Electrical
Anything about the electrical system on a Zcar.
3,450 topics in this forum
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- 11 replies
- 6.8k views
Hello all, After finishing my valvework on my 1971 240z, I went to start it up only to find that the coil was not sparking. Although the coil was recieving a full 9v when the key was turned to the 'on' position, when it was turned to the 'start' position, the voltage would fluctuate between 6 and 7 volts. After replacing the coil to no avail, I attempted bypassing the ballast resistor (I have been told it is not needed with an electronic ignition setup) and still do not see any improvement. At this point I have hit a brick wall, I've tried everything I've read online yet I still fail to recieve a full 12v while starting. What else could be the culprit besides a coil? I'…
Last reply by Zed Head, -
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- 4 replies
- 4.5k views
Hello all, I'm a new Z owner from Norway and this is my first post. I have a '71 Z that arrived from the US recently, and I'm having trouble getting the following lights to work: - Side marker lights (both) - Park lights (both) - Rear lights (both) - Dash backlights - Rear indicator (both) These lights work: - Head lights - Backup lights - Indicators front - Emergency blink (all four) - Break lights I haven't checked the bulbs, but it feels like something else is wrong. All fuses in the fuse box are replaced with new ones. After reading a couple of older threads describing similar problems, I checked the rear side of the fuse box (looks ok), and the soldering points and t…
Last reply by Nils, -
73 240Z Wiring 1 2 3
by Tiny Z- 24 replies
- 13.9k views
I have no intent of buying any of the original wiring and i am trying to figure out how to get power to and from the coil to the distributor and how it should be wired. i have seen a couple of diagrams but they do not specify what cable goes where. I'm planning of having flip switches and that kind of stuff. Seems easier than investing on a expensive harness. Thanks all help is Appreciated.
Last reply by SteveJ, -
- 5 replies
- 5k views
I'm new to the forum and 240z in general (actually any kind of working on cars in general), so when I was generously given this pdf of a wiring diagram, I made it a little more readable for people like me who are new to electronics (should be able to be printed up big and in color so you can stick it on the wall. there are one or two wires that start up as one color and end another even though it didn't go through a switch or junction, so I'm not sure if the original plan was wrong or if I messed anything up. Hopefully I can help someone out as I'm sure I'll be asking a lot of questions as I get started in my project.
Last reply by EhlersRS, -
- 9 replies
- 2.6k views
the a/c compressor relay for a 260z is no longer available from anyone. anywhere. it was suggested by a mechanic that i could substitute in any 3-blade relay provided it was rated for the correct amperage. he added that most old horn relays would probably work. anyone have any experience or thoughts on this? thanks, tony, richmond, va
Last reply by SteveJ, -
- 5 replies
- 1.7k views
Gentlemen; when I turn my key to the lock position my starter engages. I've replaced the switch with a used unit and a new unit with no change. Other than that little issue the wiring seems to be fine. Has this happened to anyone before? I'm going to dig into the wiring next week, but I can't see how the ignition switch can't be the culprit.
Last reply by Bernardd, -
- 1 follower
- 20 replies
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So after reading for a couple hours now (including some threads just like this one), I'm exasperated. I can't get my stock '71 Tach to work with the MSD setup. Setup: '71 240z. 280ZX Electronic Distributor w/ E80-12 Module. MSD 6A (Digital). Blaster 2 Coil. I found this thread that talked about the 8920 Install: http://www.classiczcars.com/forums/articles-our-members/13085-msd-6a-installation-280zx-distributor-240z-tach.html That didn't seem to work. The tach would jump when the engine turned over, but then nothing. Then I found this one, which exuded so much confidence I figured, 'that must be it' and purchased the 8910. Getting your early 240Z tachometer wo…
Last reply by ksbeta, -
- 1 reply
- 1.2k views
I've got a 77 280 and I'm planning the mounting of some relays for various improvements to the electricals, but I haven't yet decided where to physically mount the relays. Problem is that my car doesn't have A/C, but I would like to add it someday, so I don't want to mount anything in a location that would be taken by an A/C component, so... I'm looking for some good engine bay pics of a 77 with A/C that is mostly stock. I'm primarily interested in the passenger side of the engine bay and/or the firewall on the same side since that's where I think I want mount my relay block. Anyone help me out with some pics?
Last reply by 240260280z, -
- 5 replies
- 2.5k views
Just a quick sanity check on harness 27155-e4400: In the photo below: 1. The black ground is obviously tied to chassis ground at the top of the photo. 2. The top 6 pin connector plugs into the back of the fan switch. 3. The bottom 6 pin connector plugs into the blower assembly. Questions: 4. but where does the red power cable with inline fuse plug in/ draw power from? 5. and what about the 3 pin connector tied back at the top? Is it for AC option?
Last reply by jfa.series1, -
- 1 reply
- 1.2k views
I got a wind shield wiper motor off another z and it worked great, until about 10 minutes when the relay broke. I've spent some time surfing the web and can't find it. If anyone knows the part number for this relay it could really help me out. Thank you for reading.
Last reply by Mikes Z car, -
- 6 replies
- 1.4k views
I don't know if this idea is worth pursuing but I would like to have a blinking LED to remind me to pull the choke off when the car is warmed up. For those who have worked with electronic circuits (I gather some here have) what is the easiest way to do this? I was thinking about connecting an op amp up as a comparator with one input going to the thermostat and the other input wire going to an adjustable resistor so that when a certain resistance is reached the LED that is one of those blinking types is turned on. Where can the LED be hidden so it can't normally be seen? I would assume a switch connected to the choke control would be needed to turn off power to the op …
Last reply by djwarner, -
- 11 replies
- 3k views
Have been running the AC on my 78280Z blowing cold for a couple of months now. Yesterday it worked all day. Today I turn it on and nothing. Even with just fan only I get no air blowing. I have checked the fuse box. No blown fuse . With the key and switch on, I do not see any current coming across the fuse connectors. I have new vacuum lines on the Magnet valves. I don't believe (yet) that the entire fan switch went bad. Can anyone id these Relay switches for me? I cannot match up the wires from the FSM . Would one of them be a likely culprit? AND There is no way the ignition switch could be involved could there? From page AC-15 I am guessing there is not a dedicate…
Last reply by txvepr,
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