Matthew Abate Posted August 19, 2022 Author Share #49 Posted August 19, 2022 (edited) Table Number 3! This table represents half of the dashboard harness for a 1973 240z (PN 24013-M3321). It's… okay. There are three items and a missing wire I can't identify (pink cells) and I am unsure about what I marked as the heater (bright yellow cells), but it's close. The other half will be in the next table. Note: I'll post the wire lengths later. 1973 240z Dashboard Harness (24013-M3321) Inventory Position Component Connector Color Connector Style Connector Image Direction # of Pins # of Wires Diagram Wire Color Sample Wire Color Min. Feet of Wire Needed 1 Body Harness Blue Nylon 10-Prong Male 10 10 White w/ Black White w/ Black [See Speakers & Radio] Blue w/ Red Blue w/ Red [See Power Antenna Switch] White White [See Speakers & Radio] Blue w/ White Blue w/ White [See Power Antenna Switch] Yellow Yellow [See Ammeter & Fuel Gauge] Green Green [See Electric Fuel Pump] Green Green [See Engine Harness D] Green Green [See Engine Harness B] Green w/ Red Green w/ Red 4 (to Yellow Splice) Green w/ Black Green w/ Black 4 (to Gray Splice F) 2 Engine Harness B Green Nylon 10-Prong Male 10 7 Green Green 1 Green Green 4 (to Lt. Blue Splice D) Black w/ Yellow Black w/ Yellow [See Ignition Switch] Green w/ Red Green w/ Red 5 (to Lt. Blue Splice G) Green w/ Black Green w/ Black 4 (to Gray Splice E) Black – Black Black (Heavy) 1 (to Green Splice A) Yellow w/ Red Yellow w/ Red [See Switch Element] – – – – – – 3 Engine Harness D Black White Nylon 10-Prong Male 10 8 Blue w/ Red Blue w/ Red 2 (to Lt. Blue Splice B) Yellow w/ Black Yellow w/ Black [See Water Temperature & Oil Temperature Gauge] Black w/ White Black w/ White 4 (to Green Splice D) Green Green 1 Yellow w/ White Yellow w/ White [See Water Temperature & Oil Temperature Gauge] Green w/ White Green w/ White 4 (to Green Splice F) Black w/ White Black w/ White [See Tachometer] Green w/ White Green w/ White [See Hazard Switch] Blue w/ White Blue w/ White 4 (to Gray Splice C) – – – 4 Engine Harness E White Nylon Male 1 1 White w/ Red White w/ Red (Heavy) 1 (to Gray Splice A) 5 Accessory Relay White Nylon 4 3 Blue Blue 4 (to Red Splice) Blue Blue [See 30-Amp Fuse] – – – Blue Blue [See Heater] 6 Rear Window Electric Defroster Relay White Nylon 4 4 White w/ Red White w/ Red (Thick) [See 20-Amp Fuse] Blue w/ Red Blue w/ Red [See Rear Window Electric Defroster Switch] Black Black 1 (to Green Splice A) Red w/ Blue Red w/ Black (Thick) [See Junction 1A] 7 ? Clear Bullet Female 1 1 Blue w/ Red 2 (to Lt. Blue Splice B) 8 Junction 1A Clear Bullet Male 1 1 Red w/ Black (Thick) 1 Light Blue Splice A N/A N/A N/A N/A 2 Green N/A Green Green Splice A N/A N/A N/A N/A 2 Black N/A Black(Heavy) 2 (to Green Splice B) Light Blue Splice B N/A N/A N/A N/A 2 Blue w/ Red N/A Blue w/ Red Green Splice B N/A N/A N/A N/A 4 Black (Heavy) 4 (to Green Splice D) Black N/A Black Black Light Blue Splice C N/A N/A N/A N/A 4 Green N/A Green Yellow Yellow w/ Red Gray Splice A N/A N/A N/A N/A 2 White w/ Red (Heavy) N/A White w/ Red 9 Junction 1B Clear Bullet Female 1 1 Black 3 Light Blue Splice D N/A N/A N/A N/A 2 Green N/A Green 10 Speakers & Radio White Nylon Male 3 3 White w/ Black White w/ Black 4 White White 4 Blue Blue 1 (from Red Splice) 11 Power Antenna Switch White Nylon Female 3 3 Blue w/ White Blue w/ White 4 Blue Blue 1 (from Red Splice) Blue w/ Red Blue w/ Red 4 12 Heater Clear Bullet Female 1 1 Red Blue 4 13 Buzzer White Nylon Female 3 3 Black Black [See Door Switch LH] Black 3 (to Green Splice C) Green Green 2 (from Lt. Blue Splice D) Green Splice C N/A N/A N/A N/A 2 Black N/A Black 14 30-Amp Fuse White Fuse N/A 2 2 Blue Blue 4 Red Blue X (to Gray Splice B) 15 20-Amp Fuse White Fuse N/A 2 2 White w/ Red White w/ Red 5 White w/ Red White w/ Red 3 (to Gray Splice B) 16 Choke Warning Light White Nylon Male 3 2 Black Black 2 (from Green Splice C) – – – Red w/ Blue Red w/ Blue [See Seatbelt Warning Light] 17 Rear Window Electric Defroster Switch White Nylon Female 3 3 Blue Blue 1 (from Red Splice) Blue w/ Red Blue w/ Red 5 Black Black 3 (from Green Splice C) 18 Electric Fuel Pump White Nylon T 2 2 Black Black w/ White 2 (to Green Splice D) Green Green 5 19 Seatbelt Warning Light White Nylon 4 4 Red Red 2 (to Lt. Blue Splice E) Green Green 3 (from Lt. Blue Splice D) Black Black 3 (from Green Splice C) – Red w/ Blue 5 Red Splice N/A N/A N/A N/A 4 Blue N/A Blue Blue Blue Gray Splice B N/A N/A N/A N/A 3 White w/ Red (Heavy) N/A White w/ Red (Thi)ck Blue Light Blue Splice E N/A N/A N/A N/A 2 Red N/A Green 20 Fuse Box A White Nylon 6 6 Green w/ Yellow Green w/ Yellow 3 (to Gray Splice C) Green w/ White Black w/ White (Thick) 4 (to Green Splice D) Blue w/ Red Blue w/ Red [See Ignition Switch] Blue Blue 1 (to Red Splice) Blue w/ Red Blue w/ Red 3 (from Lt. Blue Splice B) Green Green 2 (from Lt. Blue Splice E) 21 Fuse Box B Black Ring w/ Cap (Nylon in FSM) N/A 1 1 White w/ Red (Heavy) White w/ Red (Heavy) 3 (from Gray Splice B) 22 Fuse Box C Clear Bullet Male 1 1 Blue w/ White Blue w/ White [See Cigar Lighter] Green Splice D N/A N/A N/A N/A 3 Black w/ White N/A Black w/ White Black w/ White (Heavy) 3 (to Green Splice G) Gray Splice C N/A N/A N/A N/A 2 Blue w/ White N/A Green w/ Yellow 23 Clock Clear Bullet Male 1 1 Black Black 1 (to Green Splice E) 24 Map Light Clear Bullet Male 1 1 Black Black 3 (from Green Splice B) 25 Ammeter & Fuel Gauge White Nylon Female 4 3 Black Black 1 (to Green Splice E) – – – Yellow Yellow 4 Yellow w/ Red Yellow w/ Red 3 (from Lt. Blue Splice C) 26 Ammeter Black Ring w/ Cap (Nylon in FSM) N/A 1 1 White w/ Red (Heavy) White w/ Red (Heavy) 2 (from Gray Splice D) Gray Splice D N/A N/A N/A N/A 3 White w/ Red (Heavy) 3 (from Gray Splice A) White w/ Red (Heavy) N/A White w/ Red (Heavy) Gray Splice E N/A N/A N/A N/A 3 Green w/ Black N/A Green w/ Black Green w/ Black Green Splice E N/A N/A N/A N/A 2 Black (Heavy) N/A Black Light Blue Splice F N/A N/A N/A N/A 3 Green w/ Red N/A Green w/ Red Green w/ Red 27 Water Temperature & Oil Temperature Gauge White Nylon Female 4 4 Yellow w/ Black Yellow w/ Black 4 Black Black 4 (from Green Splice E) Yellow w/ White Yellow w/ White 4 Yellow Yellow X (from Lt. Blue Splice C) Light Blue Splice G N/A N/A N/A N/A 3 Green N/A Green Green w/ Yellow 28 Cigar Lighter Black Spade Male 1 1 Black Black 2 (to Green Splice G) Clear Bullet Female 1 1 Blue w/ White Blue w/ White 4 29 Hazard Switch A White Nylon Female 3 3 Green w/ Yellow Green w/ Yellow [See Brake Light Switch] White w/ Black White w/ Black 2 (from Gray Splice F) White w/ Red White w/ Red 1 (to Yellow Splice) 30 Hazard Switch B White Nylon Female 6 6 Green Green 1 (from Lt. Blue Splice G) Green Green [See Turn Signal Flasher Switch] Green w/ Yellow Green w/ Yellow 3 (from Gray Splice C) Green w/ Black Green w/ Black 2 (from Gray Splice E) Green w/ Red Green w/ Red 3 (from Lt. Blue Splice F) Green w/ White Green w/ White 4 31 Hazard Switch C Clear Bullet Female 1 1 Black Black 2 (to Green Splice G) Gray Splice F N/A N/A N/A N/A 2 Green w/ Black N/A White w/ Black Yellow Splice N/A N/A N/A N/A 2 Green w/ Red N/A White w/ Red 32 Tachometer White Nylon Female 4 4 Black Black 2 (to Green Splice G) Black w/ White Black w/ White 5 Green w/ White Green w/ White 2 (to Green Splice F) Green Green (Spliced to Red w/ Blue) 3 (from Lt. Blue Splice G) 33 Turn Signal Indicator Light LH Black Blulb N/A 1 1 Green w/ Red Green w/ Red 2 (from Lt. Blue Splice F) 34 Turn Signal Indicator Light RH Black Blulb N/A 1 1 Green w/ Black Green w/ Black 2 (from Gray Splice E) 35 Switch Element White Nylon Female 3 2 Yellow Yellow 2 (to Green Splice H) – – – Yellow w/ Red Yellow w/ Red 5 Green Splice F N/A N/A N/A N/A 2 Green w/ White N/A Green w/ White Green Splice G N/A N/A N/A N/A 4 Black (Heavy) N/A Black Black Black Green Splice H N/A N/A N/A N/A 2 Black w/ White (Thick) N/A Yellow 36 Brake Indicator Light Black Bulb N/A 2 2 – Green w/ Yellow 2 (from Lt. Blue Splice G) Yellow w/ Blue Yellow w/ Green [See Hand Brake Junction] 37 Hand Brake Junction Clear Bullet Female 1 1 Yellow w/ Green 1 38 Door Switch LH Clear Bullet Female 1 1 Black Black 6 39 Turn Signal Flasher Switch White Nylon Female 2 2 Green Green 6 White White [See Combination Switch B] 40 Brake Light Switch Clear Bullet Female 1 1 Green w/ Yellow Green w/ Yellow 6 Clear Bullet Female 1 1 Green w/ Yellow Green w/ Yellow [See Turn Signal Switch] 41 Turn Signal Switch White Nylon Female 6 5 Green w/ Yellow Green w/ Yellow 6 Green w/ Red Green w/ Red 2 (from Lt. Blue Splice G) Green w/ Black Green w/ Black 3 (from Gray Splice E) – – – Green w/ Black Green w/ Black 3 (from Gray Splice F) Green w/ Red Green w/ Red 3 (from Yellow Splice) Gray Splice G N/A N/A N/A N/A 3 White w/ Red (Heavy) 3 (from Gray Splice D) White w/ Red (Heavy) N/A White w/ Red (Heavy) 42 Ignition Switch White Nylon Female 6 5 – – – Blue w/ Red Blue w/ Red 6 White w/ Red White w/ Red (Double Thick) 2 (from Gray Splice G) Black w/ Yellow Black w/ Yellow (Thick) 6 Black w/ White Black w/ White (Thick) 3 (from Green Splice H) Green w/ White Green w/ White 3 (from Green Splice F) 43 Junction 1C Clear Bullet Female 1 1 Blue w/ Red 6 (from Lt. Blue Splice B) 44 Combination Switch A Black Spade (Large) Male 1 1 Black Black (Heavy) 2 (from Green Splice G) 45 Combination Switch B Black Spade Male 1 1 White White 6 46 Combination Switch C Clear Bullet Female 1 1 White w/ Red White w/ Red (Thick) 2 (from Gray Splice G) Edited August 24, 2022 by Matthew Abate Link to comment Share on other sites More sharing options...
SteveJ Posted August 23, 2022 Share #50 Posted August 23, 2022 This may help you with identification Link to comment Share on other sites More sharing options...
Matthew Abate Posted August 24, 2022 Author Share #51 Posted August 24, 2022 (edited) 15 hours ago, SteveJ said: This may help you with identification Oh man, this is so helpful! Thank you. I keep forgetting about the speakers. I'll make these updates in my previous post. The position of the blue with red stripe wire at position #7 is right out the big colored connectors. It is spliced to a blue / red wire that goes to the fuse box and another one of the same color for the junction connector that comes out at the ignition switch. It has something to do with the wipers. The wiring diagram shows 3 blue w/ red wires: one going from the ignition switch to the fuse box, one out of the fuse box to the wiper motor, and one from the combination switch and connecting to a yellow / white wire that goes to the wiper fluid bottle. Edited August 24, 2022 by Matthew Abate Link to comment Share on other sites More sharing options...
SteveJ Posted August 24, 2022 Share #52 Posted August 24, 2022 So for #7, the LR wire coming off the fuse box goes in several directions. It turns into BY and goes out to the washer It goes to the Intermittent Relay for the wipers as LR It turns into R and goes out to the reverse switch (and inhibitor switch on the automatic). There is another LR wire that goes from the defroster switch to the defroster relay. I think there is a mistake on the wiring diagram for the intermittent relay. It shows the LR wire from the fuse box turning into BY when it gets to the intermittent relay, and another LR wire on the intermittent relay that goes to the wiper motor as BY. My guess is that BY and LR are swapped on the intermittent relay. Can you post a photo of #7 with a little more context in the wire bundle? That may help narrow it down. Link to comment Share on other sites More sharing options...
Matthew Abate Posted August 24, 2022 Author Share #53 Posted August 24, 2022 (edited) 2 hours ago, SteveJ said: Can you post a photo of #7 with a little more context in the wire bundle? That may help narrow it down. Here you go. It's the one in the black sheath with a female bullet connector pointing to the top of the photo (between the blue wires and the white wire w/ the red stripe). Edited August 24, 2022 by Matthew Abate Link to comment Share on other sites More sharing options...
SteveJ Posted August 24, 2022 Share #54 Posted August 24, 2022 9 minutes ago, Matthew Abate said: Here you go. It's the one in the black sheath with a female bullet connector pointing to the top of the photo (between the blue wires and the white wire w/ the red stripe). Perfect. Now I can look for it in my car. Link to comment Share on other sites More sharing options...
SteveJ Posted August 24, 2022 Share #55 Posted August 24, 2022 Found it Here are wires going to the intermittent relay: Obviously, the wiring diagram in the FSM isn't quite right for the intermittent relay as it shows 9 wires. There isn't a BY wire going to the relay, and there is only one ground wire. Link to comment Share on other sites More sharing options...
Matthew Abate Posted August 25, 2022 Author Share #56 Posted August 25, 2022 (edited) Amazing! So not only does that solve #7 in harness #1, it solves for position #5 in harness #2, which you would not know because I have not posted the table for yet. The only mysteries I will have left are the 4 wires that are missing (2 from the dash and 2 from the engine) and a blue connector on this harness I am chasing now, which might be to the radio lights. Maybe I can find those using the diagrams. Edited August 25, 2022 by Matthew Abate Link to comment Share on other sites More sharing options...
Matthew Abate Posted August 26, 2022 Author Share #57 Posted August 26, 2022 (edited) Table Number 4! This table represents the other half of the dashboard harness for a 1973 240z (PN 24013-M3322). It was much easier than the other half. There only two items I couldn't figure out: a missing wire in the blue 10-pin connector to the engine harnes and a blue wire near the fuse box branch what might be power to the Radio (pink cells). Pretty close to done with this inventory now. I have some small harnesses to capture still (fuel pump harnesses and the heater controls harness), but I don't think I need them for my final build so I may do that later. 1973 240z Dashboard Harness (24013-M3322) Inventory Position Component Connector Color Connector Style Connector Image Direction # of Pins # of Wires Diagram Wire Color Sample Wire Color Min. Feet of Wire Needed 1 Engine Harness A Blue Nylon 10-Prong Male 10 9 Blue w/ White Blue w/ White 1 (to Lt. Blue Splice D) Red Red [See Fog Light Switch] Black w/ Yellow – Red w/ Black Red w/ Black [See Body Harness Aux] Yellow w/ Green Yellow w/ Green 1 (to Lt. Blue Splice A) Red w/ Black Red w/ Black [See Light & Horn Switch] Red w/ White Red w/ White (Thick) 5 (to Gray Splice) Green w/ Black Green w/ Black [See Light & Horn Switch] Green w/ Red Green w/ Red [See Fuse Box D] – – – 2 Engine Harness C White Black Nylon 10-Prong Male 10 8 Red w/ Blue Red w/ Blue [See Combinations Switch E] Red Red (Thick) 3 (to Brown Splice) Green w/ Blue Green w/ Blue 1 (to White Splice A) Red w/ Blue Red w/ Blue [See Fuse Box D] Red w/ Yellow Red w/ Yellow (Thick) [See Fuse Box D] Blue w/ Yellow Blue w/ Yellow [See Combinations Switch E] Yellow w/ Black Yellow w/ Black [See Combinations Switch E] Black Black 2 (to Lt. Blue Splice C) – – – – – – 3 Engine Harness F White Nylon Female 1 1 White White (Heavy) 2 (to Yellow Splice A) 4 Intermittent Relay White Nylon Female 6 4 Blue w/ White Blue w/ White 2 (to Lt. Blue Splice C) Blue Blue [See Combinations Switch E] Blue w/ Red Blue w/ Red [See Intermittent Relay Junction 2] Blue w/ White Blue w/ White 2 (to Lt. Blue Splice B) – – – – – – 5 Intermittent Relay Junction 2 Clear Bullet Male 1 1 Blue w/ Red 1 6 Body Harness Aux White Nylon Female 6 6 Red w/ Black Red w/ Black 1 Red w/ Blue Red w/ Blue 3 (to Yellow Splice B) Yellow w/ Green Yellow w/ Green 1 (to Lt. Blue Splice A) Black Black 6 (to Yellow Splice F) Red w/ Black Red w/ Black [See Junction 2A] Green w/ White Green w/ White 2 (to White Splice A) 7 Junction 2A Clear Bullet Male 1 1 Red w/ Black 1 Light Blue Splice A N/A N/A N/A N/A 2 Yellow w/ Green N/A Yellow w/ Green White Splice A N/A N/A N/A N/A 2 Green w/ Blue N/A Green w/ White 3 (to White Splice C) Light Blue Splice B N/A N/A N/A N/A 2 Blue w/ White N/A Blue w/ White Light Blue Splice C N/A N/A N/A N/A 2 Black N/A Blue w/ White Brown Splice N/A N/A N/A N/A 2 Red (Thick) N/A Red Yellow Splice A N/A N/A N/A N/A 2 White (Heavy) N/A White Yellow Splice B N/A N/A N/A N/A 3 Red w/ Blue N/A Red w/ Blue Red w/ Blue White Splice B N/A N/A N/A N/A 2 Red w/ Blue N/A Green w/ White 8 Radio White Nylon Female 3 2 Red w/ Blue Red w/ Blue 1 (from White Splice B) Black Black [See Junction 2B] 9 Junction 2B Clear Bullet Male 1 1 Black 1 10 Radio Illumination / Power - ? Clear Bullet Female 1 1 Blue Blue 3 (to Yellow Splice D) 11 Fog Light Switch White Nylon "T" Male 2 2 Red Red 4 Red w/ Green Green w/ White 2 (from White Splice B) 12 Fuse Box D White Nylon Male 6 7 Red Red (Thick) 2 (from Brown Splice) Red w/ Yellow Red w/ Yellow (Thick) 4 Green w/ Red Green w/ Red 4 Green w/ Blue Green w/ Blue [See Combinations Switch E] Red w/ Blue 4 Red w/ Blue Red w/ Blue 2 (from Yellow Splice A) Red Red (Thick) [See Combinations Switch D] 13 Fuse Box E Clear Bullet Female 1 1 White White (Thick) 3 (from Yellow Splice A) 14 Glove Box Light Clear Bullet Female 1 1 Red w/ Blue Red w/ Blue 1 (from Yellow Splice B) 15 Clock Power Clear Bullet Female 1 1 Blue Blue 1 (to Yellow Splice C) 16 Clock Illumination Black Bulb N/A 1 1 Red w/ Blue Red w/ Blue 2 (to Yellow Splice D) 17 Map Light Clear Bullet Female 1 1 Red w/ Blue Red w/ Blue 1 (to Yellow Splice C) White Splice C N/A N/A N/A N/A 3 Green w/ White 2 (from White Splice B) Green w/ White 3 (to White Splice D) 18 Ammeter Black Ring w/ Cap (Nylon in FSM) N/A 1 1 White White (Heavy) 2 (from Yellow Splice A) 19 Ammeter & Fuel Gauge Illumination Black Bulb N/A 1 1 Red w/ Blue Red w/ Blue 2 (to Yellow Splice D) Yellow Splice C N/A N/A N/A N/A 3 Blue N/A Red w/ Blue Red w/ Blue 20 Water Temperature & Oil Temperature Gauge Illumination Black Bulb N/A 1 1 Red w/ Blue Red w/ Blue 1 (from Yellow Splice D) Yellow Splice D N/A N/A N/A N/A 3 Blue N/A Red w/ Blue Red w/ Blue Red w/ Blue 21 Tachometer Illumination A Black Bulb N/A 1 1 Red w/ Blue Red w/ Blue 2 (to Yellow Splice E) 22 Tachometer Illumination B Black Bulb N/A 1 1 Red w/ Blue Red w/ Blue 2 (to Yellow Splice E) 23 Illumination Dimmer (Rheostat) Black Spade Male 1 2 Red w/ Blue Red w/ Blue 2 (from Yellow Splice D) Red w/ Blue 2 (to Yellow Splice E) Clear Spade Female 1 1 Red w/ Blue Red w/ Blue 1 (to White Splice D) 24 Cigar & Hazard Fiber Optic Light Source White Nylon Female 2 1 Red w/ Blue 1 (to White Splice D) – – Male 1 1 Black 1 (to Cigar Lighter) Gray Splice N/A N/A N/A N/A 3 N/A White Splice D N/A N/A N/A N/A 3 Red w/ Blue N/A Red w/ Blue Green w/ White 25 Steering Lock Switch Clear Spade Male 1 1 Black Black 3 (from Yellow Splice F) Clear Spade Female 1 1 Red Red [See Step Light Harness] 26 Light & Horn Switch White Nylon Female 3 3 Red w/ White Red w/ White (Thick) 2 (from Gray Splice) Red w/ Black Red w/ Black 6 Green w/ Black Green w/ Black 6 27 Combinations Switch D Clear Bullet Male 1 1 Red Red (Thick) 6 28 Combinations Switch E White Nylon Female 9 9 Blue w/ Yellow Blue w/ Yellow 6 Blue Blue 7 Blue w/ Red Blue w/ Red [See Junction 2C] Yellow w/ Black Yellow w/ Black 6 Red w/ Blue Red w/ Blue 6 Blue w/ White Blue w/ White 6 (from Lt. Blue Splice C) Blue w/ White Blue w/ White 6 (from Lt. Blue Splice B) Green w/ Blue Green w/ Blue 6 Green w/ White Green w/ White 2 29 Junction 2C Clear Bullet Male 1 1 Blue w/ Red 1 Yellow Splice E N/A N/A N/A N/A 3 Red w/ Blue N/A Red w/ Blue Red w/ Blue Yellow Splice F N/A N/A N/A N/A 2 Red w/ Blue N/A Red Yellow Splice G N/A N/A N/A N/A 2 Black N/A Black 30 Speedometer Illumination Top Black Bulb N/A 1 1 Red w/ Blue Red w/ Blue 1 (from Yellow Splice F) 31 High Beam Indicator Light Black Bulb N/A 1 2 Red Red 4 (to Brown Splice) Red w/ White Red w/ White 2 (from Gray Splice) 32 Speedometer Illumination Bottom Black Bulb N/A 1 1 Red w/ Blue Red w/ Blue 2 (from Yellow Splice E) 33 Hand Brake Junction Clear Bullet Male 1 1 Yellow w/ Green 6 (from Lt. Blue Splice A) 34 Step Light Harness Clear Bullet Male 1 1 Black Black 1 (from Yellow Splice G) Clear Bullet Female 1 1 Red w/ Blue Red w/ Blue 1 (from Yellow Splice F) 35 Door Switch LH Clear Bullet Female 1 1 Black Black 1 (from Yellow Splice G) Clear Spade Female 1 1 Black Black 3 Edited August 26, 2022 by Matthew Abate Link to comment Share on other sites More sharing options...
Matthew Abate Posted September 4, 2022 Author Share #58 Posted September 4, 2022 (edited) I did a quick tally of which wires need to be which gauge and this is what I ended up with: Components Gauge Wire Color Starter Ground, Combination Switch 10 Black Black w/ White Fuel Pump Green Headlights Red w/ White Starter, Ammeter White Alternator, Ammeter White w/ Red 12 Black w/ White Ignition Switch Black w/ Yellow Ignition Switch Green w/ White Headlights, Combination Switch Red Rear Glass Defroster Red w/ Black Light & Horn Switch Red w/ White Headlights Red w/ Yellow Fuse Box White Ignition Switch, Combination Switch White w/ Red All others would be 14 AWG. There may be some 16 or 18 AWG in the car originally, but I don't see a reason to go that light. Please let me know if you think I have any errors here. I'm also wondering if it would be worthwhile to step everything up one level, or if that would be a waste of money and weight. Edited September 4, 2022 by Matthew Abate Link to comment Share on other sites More sharing options...
SteveJ Posted September 4, 2022 Share #59 Posted September 4, 2022 (edited) Just be aware of what gauge wires your terminals are designed to take. Doing some quick resistance calculations, you are upsizing a lot of wires with little to no benefit. You may end up with an issue getting your engine harness through the hole in the firewall. (Keep in mind that it will probably be easier if you put the pins in the connectors after you get the harness through the firewall.) You may want to check out a voltage drop calculator like this: https://www.calculator.net/voltage-drop-calculator.html Choose estimated resistance. I did a quick calculation for the headlights with a swag for the distance and used incandescent sealed beam ratings. The voltage is 13.8 because that is toward the low end of operating voltage while the car is driving. Many of your circuits for the engine harness are grounded close to the load, so this calculator would overestimate the voltage drop. The battery/charging system are your highest current circuits, so the larger gauge can easily be justified. No other circuit comes close especially if you change the parking light circuit to LEDs, as that is probably the biggest continuous draw you would see. Other high draw circuits: Fan (14 AWG is fine, but you might be better off with 12 AWG) Fuel pump (This is about 10 A or less. 14 AWG would work.) Headlights (depending upon whether or not you switch to LEDs. LEDs would drop this circuit to about 3 A.) Edited September 4, 2022 by SteveJ Fixing grammar 2 Link to comment Share on other sites More sharing options...
Matthew Abate Posted September 4, 2022 Author Share #60 Posted September 4, 2022 (edited) I plan to use LEDs but I want to wire the car so that I don’t HAVE to use LEDs, particularly for the headlights. My thoughts on having 14 AWG be my smallest wire was coming from a few things: First, the amount of fried wiring I found. It’s possible the heat came from outside but in places like under the dash I don’t know what would cause that, so I was assuming that it was overload on the wiring. Second, the general use of 10-amp fuses for everything that wasn’t one of the fatter wires, plus the gauge charts I’ve been using. However, I suspect the dash maybe could come down a notch for all the instruments and save me some headaches with fitting all that stuff in there. Third, just eyeballing stuff looks like a lot of 14 AWG. Maybe I’m off base and It's smaller than that. Tough to tell since it's actually Japanese (square millimeter?) wire and not AWG. need to go back over it more carefully. I would love to plug all the numbers for everything in the car into a calculator, but I just don’t know where to find that information. Edited September 4, 2022 by Matthew Abate Link to comment Share on other sites More sharing options...
Yarb
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now