Hi. I don't post on here much, but I really have a problem I cannot solve.

 

I have an '85 300z, non-Turbo. Recently the engine harness caught fire under at the EGR. I guess it was up against the EGR mounts and over heated.

I cut out the bad section, about 3" and reinserted the same gauge wires with butt connectors. Didn't start. I then found the fusible link's box and replaced the burned fuel injector link. Didn't start. Then I replaced the fuel pump fuse, voila, it started and ran perfectly.

 

The problem now is that when I shut it off and remove the key, all the idiot lights that come on when you start the car come back on after about five seconds and don't shut off.

I rechecked the repaired harness at least three times and I am positive it is correct. I replaced the ignition and theft warning relays. Still comes on. I traced the wire all the way from the EGR solenoid valve back to the ignition switch. After removing half the console, I started the car and disconnected the ignition switch, to see if that was the problem. The engine died and the lights came on after a few seconds. The lights do turn off when I remove the ECC fuse (the wire runs through here) or when I disconnect the EGR solenoid. I replaced the solenoid with a junkyard piece and a third and fourth harness for it. The harnesses have diodes in them so I got a few just in case one was bad. I still get the same problem. When the lights come on, so does the voltage gauge. I think it has been draining the battery.

 

Does anyone know whereelse to look? Is there anoither relay I didn't find? I can here the ignition relay flip when the gauge lights come on. Is there an applied voltage to turn them off? I checked the Haynes schematics and couldn't find anything else. What am I over looking? Please respond with any suggestions because I really want to get this fixed so I can drive this car.

 

Thanks for any help.

 

Warren

Just in case anyone wanted to know, I finally fixed this after three days of testing.

 

There are two blue wires coming off the harness, identicalcolring. I checked them two or three times before with a voltmeter checking for continuity and I kept getting a beep (they were coming from the same source). Before tearing the car to shreds, I rechecked all the wires and similar color ones. I ending up checking resistance to ground. When I got to the blue wires, one read 15ohms and one read 1.3 kohms. This is when I realized there might be a problem. I cut the wires and cross connected them and everything went back to normal. So essentially the idiot light problem was due to idiot error.

Glad you got it sorted. Keep an eye on http://www.zclub.net incase of futher problems, they cater for the Z31, but we are Z32 only here.