'89 240, accessory/lighting problem

[ReaperBJJ]

I've tried this thread in acouple other sections but hardly anybody has given me any help. I have a pretty nasty electrical problem, I've glanced at the FSM wiring diagrams, but they're all big and intimidating hahaha. Here's a list of my problems and what I've done so far to try and fix it.

1)Nothing works on my Accessory setting, only my headlights work at all times.2)Nothing works right at start-up like it should, everything is the same as if the car was off, until I rev the car a few times and then the clock, heater fan, tails, brake lights, any other things I had turned on will click on.3)Dashlights work fine after I rev the car like stated above, but I've noticed that the door chime will only work while the headlights are on.4) horn and auto seatbelts don't work no matter what, not a big deal because they're stuck in the back position but still....5) I believe theres a short somewhere in the gauge cluster, My speedo, tach, seatbelt light, e-brake light, etc. Worked for awhile but one time when I was reving the engine up a little bit all the things I just listed died. I checked the fuse box and noticed that the fuse marked "meter" was blown, so I replaced it with a new one, turned the motor back on, did the rev thing, the cluster stuff worked for a second and then the fuse blew again.6) My idle is ****, it'll drop really low sometimes and then jump back up a bit.7) There are 4 cut off and bare wires coming from the harness that runs to the wiper/light lever switches, and one plug with no mate coming directly out of the ignition tumbler. The colors are red/blue stripe, blue/no stripe, yellow/red stripe(as far as I know that's supposed to be the wire for the tach, maybe I didn't see the color right), and blue/red stripe. There is also a thicker teal wire coming out of a spliced connection for the red/blue stripe wire. Also there are about 3-4 wires not connect to anything, and not taped in the audio harness.



Ignore the gaping hole in my floor panel, I just haven't gotten around to welding it as I'm busy trying to fix the electrical issue.

I have already tried putting in a brand new ACC relay and that did not work. My alternator is brand new, I just put it in this past weekend.I think I covered all the info that I have at the moment. Could somebody give me some ideas or advice? I believe that it might be a grounding problem and that I might have a short in my cluster area. I've taken the gauge cluster off and I don't see anything that looks out of the ordinary to me, but I am a noob to cars, and especially to the hell that is wiring.

ANY help would be appreciated, I want to get this wiring done so I can move on to other things

[danielsan]

this forum sucks when it comes to wiring, it seems no one knows whats up. anyways im having the no dash light/hvac problem. i went through every wire checking voltage, and checking the grounds. everything seems like should be but i get nothing when i turn the light switch.

tell you what i will take some pics of what my wiring looks like in that area.

wiring is such a pain is the ***. hell i had no ignitions signal to the stereo wiring and to the cluster. found out that the fuse was loose and had to use some xtra wire to keep it in place. now the stereo works like it should but now the clock light comes on when have the key in acc or on but shuts off when i turn the lights on WTF?? also the lights on the temp and fan slider buttons went out. uhh this wiring is killing me.

[MaximA32]

I'm not great with electrical by any means but it sounds like you have a short to ground somewhere. Your best bet would be to sit down with the electrical diagrams and try to figure out what goes where. I know it's time consuming and boring but if you want to fi the issue yourself, it's the only way.