R33 Gtst Light issue

[Thomas58]

Hello,

I have an R33 skyline and I am having issues with fog lights, reverse light, dash light and tail lights all staying on constantly unless I unplug the battery,

long story short I recent bought this car and the wiring harness in the engine bay shorted out and melted most of the wiring in the harness making me lose pretty much all power to accessories and dash cluster and so on, I bought a harness from a wrecker that had been cut instead of unplugged (typical wrecker) and colour matched all the wiring back to how it was pre-melted, everything is working now apart from my left hand headlight, and other issues listed at the top, the reverse lights even stay on if I unplug the sensor from the gearbox, I have replaced the headlight relay to no avail, can anyone provide diagrams or maybe some troubleshooting ideas?

I believe the harness from the wrecker was from a later model R33 I’m not too sure if there might be a colour difference or not

thanks

[Duncan]

wow, big job to replace then repair!

So I can't remember in a 33 GTST, but in a 32 the fog light button turns on the fog lights and tail lights...sounds dumb but you'd be surprised how many times it has caught people out.

Assuming you are sure that it is not that, I don't think you can trust colour matching. But in any case you need to start by pulling every fuse until one or more of those issues are fixed, there are very few unfused circuits (eg alternator and starter) so you will be able to narrow it down. Then you need to trace the loom for those circuits, I can't think of any short cut.

Reverse lights send the positive power through the gearbox switch so that might help a little in that case. In 32 the fog lights/dash/tail lights positive all go through the dash switch but I'm not sure if that is the same in 33.

[GTSBoy]

And a big troubleshooting tip is that any circuit that is still lighting up after you have removed the correct power supply for it (wire, fuse, etc) has a short to another circuit somewhere. Crossed wire, failed component perhaps.

The R33 wiring diagrams are freely downloadable. They are almost certainly attached to a post on these very forums. Have a search.

[Thomas58]

Thank you guys,

looking at the wiring diagram it seems all of the lights I am having issues with share a common power wire, ill investigate some more and see if there may be a short in the system

 

Thanks,