Welcome Guest! Please read more information about our club!

Electrical

Anything about the electrical system on a Zcar.

Followers 10

3,450 topics in this forum

Sort By

Flasher on a late 73

July 17, 2011 by 240ZGL
4 replies

1.7k views
Ok, so the turn signals are not working on my 73. The electrical system is in good shape, everything lighting wise is working great but no turn signals. I have seen in other posts where the flasher unit is up under the streering colume and under the dash on the left side but I can't seen to find mine. When I hit the emergency flashers I'm getting the normal clicking but from the relay panel on the passenger side under the dash, just can't figure out which relay it is. Maybe it's a late design change that they did on the 260's, I'm not sure. I do know I don't see anything that looks like a regulare round flasher unit. Anyone out there seen this or knows where I can find it…

Last reply by Bonzi Lon, July 18, 2011
Blue Wires with in-line fuses

July 16, 2011 by coopdog240
11 replies

1.8k views
I have two blue wire coming out of the dash harness, both with in-line fuses. Both test cold with ignition off or ignition on. (Yes, the fuses are good and I tested behind the fuse too.) What are these wires for??? Car is a 10/70 build date

Last reply by coopdog240, July 17, 2011
240 Tail light patterns, bulb configurations?

July 16, 2011 by 71ZZZZZ
2 replies

1.7k views
...been troubleshooting my lighting and haven't found this information in one place, anyone have a link to something similar? It seems that tail light patterns and bulb wiring configurations are different for 240s (obvious, right...) but subtle. I was searching for info that documented this. Found some interesting info... #1 - 4/71 (mine): L B/T/R (1034) | T/B/Haz (1073) R (1034) | Rev (1073) #2 - ebay set Unknown year (need to confirm lighting pattern): L B/T/R (1157) | T/B/Haz (1073) …

Last reply by 71ZZZZZ, July 16, 2011
? for the water temp switch

July 12, 2011 by mjr45
5 replies

2k views
Yesterday I pulled out the water temp switch with the intent of replacing the 2 wires on it. The ground wire broke off right as it goes into the fitting (not wire to solder). Since its basically just a ground, if I fabed a washer with a ground wire and put it on the fitting as it goes into the thermo housing would this work? I'm not sure if the ground has to be intergral to the switch or if an external ground would work. Or should I just leave it non functional since it basically only affects cold starts. I have removed the EGR system from the intake by replacing the intake with a non EGR type.

Last reply by mjr45, July 13, 2011
Voltage regulator wiring dilemma

June 24, 2011 by greentrees
4 replies

2.1k views
Had to jump my car the other day but prior to that the lights would brighten as I give the car gas. I'm goin to try and replace the VR before replacing the whole ALT. The problem is that the orig VR has a wire spliced, it's a white/red wire from the middle column of the harness. Is this a common thing to do and do I have to splice the wire for the new VR. BTW looks like the wiring on the car has been fiddled with quite a bit. I really want to go with the MSA ALT upgrade but will the VR adapter still be a PNP set up because of this wire splice and how can I fix it? Here's a couple pics to better illustrate... the circles are where the spliced wire connects on the VR…

Last reply by Zs-ondabrain, July 13, 2011
Wiring Harness: A few questions

July 12, 2011 by ksbeta
10 replies

2.1k views
I've thanked you guys plenty for all your help, but I should also take a minute to thank Mike for maintaining the site, the means by which I'm able to rack your brains. So I pulled my dash harness, repaired the oddities, and with the Factory Service Manual in-hand, I've gone about the task of re-attaching it. In this process, a few questions have arisen: 1) What is this 2-prong connector? I'd normally assume Power/Ground, but it's the only T-type I found on the dash. I located it in the FSM, but it doesn't identify where it connects to. I'm having trouble attaching photos via the URL, so I'm going to have to do them by uploading... not sure what order they'll come…

Last reply by Zs-ondabrain, July 13, 2011
Blower fan sub harness

July 12, 2011 by coopdog240
0 replies

1.3k views
Can anyone tell me what the heavy red wire and the blue wire on the blower sub-harnes go to. 10/70 build date

Last reply by coopdog240, July 12, 2011
Electrical insanity

July 12, 2011 by GIchiro
5 replies

1.4k views
Wow I am going crazy. I have a '73 z 4 spd(02/73 mfg date) with the elec fuel pump and 9 pin combo (headlight/wiper/washer) switch. -MSA alt upgrade killed my battery so after research realized that it keeps the fp relay on so I disconnected it. -MSA headlight relay harness. Lights don't go on but they did prior to my son installing a refurbished turn signal switch. Read Mike W's pdf and am going to try that. -I have a few relays on the passenger side and was wondering what is what. a. I realized the FP was the warm to touch relay. b. I have another relay that has 6 pins (2 rows of 3) with wires grn-grn-blk/ylw-2 blk in same spade. c.The pigtail also conne…

Last reply by Zs-ondabrain, July 12, 2011
Turn Signal Went Up In SMoke

June 28, 2011 by Marty Rogan
10 replies

3.9k views
I finally got time to get the blue '70 out of storage and went for a drive on Sunday. On the way back, I turned on the left turn signal and smoke started coming out of the steering column. I shut everything off right away and it stopped smoking. Last night I took the cover off the steering column. None of the wires looked melted. I am guessing something inside must have fried. Anybody have that happen to them? I remembered that I bought a brand new turn signal and headlight combo switch years ago as spares. After I dug out the spare and removed the original, I started noticing that they were different. The original has two large plugs, one with 3 prongs, the other has…

Last reply by grantf, July 12, 2011
Amp meter pegs all the way right 1 2

July 9, 2011 by Diseazd
12 replies

2.1k views
I just fired up the new engine in my 71. The amp meter pegs all the way right a nd the alternator heats up. I changed the voltage regulator.....same result. Any ideas where to go next? Guy

Last reply by FastWoman, July 11, 2011
Tachometer jumps when ignition is turned but drops back to zero once car starts.

July 8, 2011 by Ptero
5 replies

2.6k views
A few details on the car. 1973 240z /w electronic ignition. Using ignition module E12-80. Exactly as the title says. When starting the car the tach will bounce a bit but then drops back down to zero once the car has started. When driving the tach stays at zero. Today the tach slowly crawled up to 8k and stayed there until I turned the car off. I did however read that this happens when it's hot outside and today was one of those days. So that one makes sense (to an extent). I searched but didn't find another issue like this one. Is my tach fubar'd or do I still have a hope of getting this thing working? What I found on the tach going up due to hot weather.

Last reply by beermanpete, July 10, 2011
Zs-ondabrain I need your help

July 9, 2011 by 240ZGL
4 replies

2.2k views
The alternator conversion works great, but I have a 73 with the fuel pump relay that stays on. I have done a toggle switch on the yellow power wire but this is not a great solution. I want to do a Bosch relay, that uses a switching wire from the on side of the ignition switch. I just can't figure out the Bosch relay. I think the yellow wire that feeds power to the FP relay should be wired 30 in and 87 out to the relay. Do I switch the Bosch on with 85 and ground 86 or the other way around.

Last reply by 240ZGL, July 10, 2011