Electrical
Anything about the electrical system on a Zcar.
3,450 topics in this forum
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Hi gang, I’ve gone through 5 alternators in the past 7 years. These are all rebuilt ZX units each of which had different problems (hemispheres not lining up so couldn’t mount, squealing bearing, etc). That said, the vast majority had the internal voltage regulator die and overcharged the battery per the voltage gauge (yes I checked with a multimeter). Because oreilly lifetime warranties these, I’ve just been swapping them but I’m tired of this haha. Are there any drop-in brand new (not remaned) alternators that work? I know there’s a gm alternator that does but that requires permanently modifying the mounting bracket which I’d like to avoid… …
Last reply by chaseincats, -
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The 72 I'm working on has the usual melted fuse contact on the Parking/Tail lights circuit but as I went through the car I checked every bulb and contact points, the wires and connectors and didn't find anything concerning. The car is back together but that same fuse holder getting hot. Any ideas where I should start my hunt? Thanks
Last reply by Yarb, -
So, a little background. For my AC system control relay, I need a signal that ties into the charging circuit (D+61). On a Volvo, this would travel to the ground side of the idiot light, and ground through the alternator (D+61 terminal) when the engine is not running. As far as I can tell, there is no way to wire this to the alternator, as it doesn't have a equivalent connection 75 280Z Volvo alternator, has an additional diode pack. I don't even know if using a later internally regulated Datsun alternator would fit the bill. I read in another thread (can't quote it here) @SteveJ - That the L terminal of the V reg…
Last reply by HusseinHolland, -
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I have at least one socket with broken/dried out tabs for the HVC control panel - I'm not finding anything searching for repalcement sockets in general - has anyone found a generic / aftermarket bulb holder/ socket that will clip in place, that also has the correct bulb depth? I know the bulb socket for the low fuel light will fit here - so I will likely cut the harness on that & use it here. I'd still like to know if there are any useable options for the instrumentation.
Last reply by SteveJ, -
Nice Beepers! 1 2
by SteveJ- 3 followers
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I cracked the code on the horns. I was working on getting @Tirnipgreen's re-plated horns working. I tinkered with them some a while back, but I needed some time to focus on them to get the bugs out. Fortunately I had one of my old 260Z horns that was unmolested to use as a template. Before I go into detail, let's talk about the theory of operation. When you press the horn button, the relay sends voltage to the horn. The coil in the horn is energized, pulling the diaphragm in. The bar on the back side of the diaphragm hits a tab on a set of contacts on the negative side of the coil, de-energizing the coil. The diaphragm snaps back i…
Last reply by KenFirch, -
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I have heard and read in the archives that there is a few years where the 260z and or the 280z had a Volt/Fuel gauge that can replace the early Amp/Fuel gauge. None of the threads I found listed which years the Volt/Fuel gauge came in or really described the change over. I know I have to connect and isolate the charge wires going to the Amp meter but wondering if anyone has done this change over and could add some detail? Thanks, Chris
Last reply by Yarb, -
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Last night when I started the car (1970 240z #7951) I saw smoke coming from the steering column. I went out today and opened up the column and started the car. No smoke until I turned on the head lights. I felt the wire heating up before it started smoking. It's the two black wires coming out of the top of the switch. I do have both relay harness upgrades ordered but I don't know if that's a fix for this issue. Any ideas on how I can further investigate this. I'm trying to trace the wired out to there termination point, it's kind of difficult, but I'm working on it.
Last reply by z8987, -
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I've searched the forum on this topic but could not find exactly what I'm looking for. Here's the issue: 73 restoration. Originally an auto trans with dual points. I've converted to manual trans but I'm utilizing the original wiring harness. All the pollution equipment has been removed. The intake, carburetors, distributor, trans/clutch parts from a 72 have been installed. Since the 72 dist. has only one points wire connection and the 73 had two, I've connected the two wires from the 73 wire harness together and connected them to the single connector on the 72 points. Would this cause a problem? The car starts ok and runs ok but is currently breaks up after a few…
Last reply by Yarb, -
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Hi, does anyone know when the little red light in the speedo gauge that says "brake" on it lights up. Should it be linked to the handbrake or is it just a brake warning light. Just mine has never lit up and wondered if I needed to look behind the gauge at changing the bulb or checking the wiring to the handbrake. Thanks
Last reply by z3beemer, -
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I have put new connectors on the voltage regulator wiring. I wired the connectors exactly as they were before going to paint. One of my questions is why are there only 5 wires coming from the wiring harness, but 6 coming from the voltage regulator. The white wire with red stripe (IMG_7889.jpeg) from the voltage regulator does not connect to a wire from the harness. Also there is a single black wire with white stripe (IMG_7890.jpeg) coming from the harness that does not appear to connect to anything. Anyone know what the wires purpose is? Greg
Last reply by GregD, -
- 1 follower
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Hey, the turn signals in my 73 240z have been intermittent and I finally decided to bite the bullet and try and separate the turn signal assembly and I noticed that the little ball that's supposed to be on the end of the spring was missing. Basically #2 in this picture Anyone have any idea what size that is? It might just guess and try and buy a few small ones
Last reply by hotsho111, -
- 2 followers
- 7 replies
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The relay diagram is somewhat confusing to deal with as a reference for what's actually there. Ultimately, the one that is unknown is the 25230-89914 relay The reality top: 25230-N3000 - should be Defrost relay top right: - Horn Relay Left: - Interval relay Bottom front: 25230-89914 ? Online says interval relay, diagram says AC relay, but mine didn't have factory AC Bottom right (back): Cat hold relay (not shown) Top middle (back): 28911-89910 Seat Belt Buzzer? Interval relay wiring doesn't match the schematic - shows 10 connections but - on…
Last reply by HusseinHolland,
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