I NEED HELP PLEASE

[juggalo300zx]

ok i have a 1985 nissan 300zx and dont get me wrong i love this car but i need help ok the problem is every time i drive the car i have to drive with my lights on if i turn them off the car dies. i have checked most of the wiring and i cant seem to find it i just want to know if any one else in the world happened to have a simmialar problem or if its just this car f***ing with me please help

[sharjt]

I've never heard of anything like that in my life. but I guess the solution is to drive with your headlights on, LOL.

[evildky]

wow that is weird, I'd suspect some sort of ground issue from the ignition sircuit, I suspect it's somehow shorted by the light circuit, might be easier to find a donor car and swap the dash/chassis harness

[juggalo300zx]

thats pretty funny i tried checking all the wiring and nothing seem to be wrong i took it to nissan and they couldnt tell me why either but thanks for makin me laugh about the whole situation

[evildky]

yeah welltahts the problem when trying to fix intermitant problems, if it won't stay broke you can't diagnose ti to fix it, which is shy I'd say pull the harnesses and swap in new/used ones, had a guy in out local club unwrapped his whole harness and visually inspected every wire and fixed all the problems, now has a good working harness, of course in the S30 chassis there are a lot! less wires

[Glorywagon]

Maybe a Canada Car the head lights has to say on.

[ScottJackson]

does it have a single ignition coil or multiple? Anyway, I'd check the + wire for the coil(s) for voltage with the headlights on and headlights off. If it loses juice when the lights are off, you need to just find a good power wire that comes on with ignition switch and hook it to that. I had a problem in my jerry-rigged '89 camaro where the engine would lose power when I had the windshield wipers going. Turns out the wire I used to power my fuel pump would lose power whenever the wipers would move.

[AZ-ZBum]

How is the idle? The Z31 is supposed to have an idle up sensor that detects when a load is drawn (lights, AC, etc). The car should idle at about 800 rpms with nothing on and 1100 rpms with something drawing a load.

[juggalo300zx]

thanks for all the help ppl