First time electrical with pics.

[OG 91 LC]

Breathing....................... Breathing.................. For sure. Much better.

Hey fellas. I'd never thought I would own a truck that I could take apart like this. It's pretty fricken rad!!!!! And the support on here and of the local members SoCal 80s is bad ass!!!!! Thanks to Peter we (he) did some early Sunday morning diagnostics. I have some pics of behind the stereo and such. Stay tuned.

 

[landcrshr]

The "DOME" fuse supplies the radio and factory amp with constant 12 volts.

If your head-unit is wired-in using the two gray plugs, you will need to unplug the factory amp located behind the right dash speaker (two white plugs, accessed with the glove box removed).

Also, have you tried unplugging the head-unit to see if that keeps the dome fuse from popping?

 

[OG 91 LC]

The "DOME" fuse supplies the radio and factory amp with constant 12 volts. If your head-unit is wired-in using the two gray plugs, you will need to unplug the factory amp located behind the right dash speaker (two white plugs, accessed with the glove box removed). Also, have you tried unplugging the head-unit to see if that keeps the dome fuse from popping?

I think I have more issues than just that. I'll post more pics later. Here are pics of factory amp and sub woofer and how the stereo is connected on the back. You can see where stereo connection has 10 amp fuse. Sub woofer on the back PS rear quarter panel. Here is PS glove box kick panel. Not sure what to disconnect there. Thanks fellas.

 

[landcrshr]

Here is PS glove box kick panel. Not sure what to disconnect there. View attachment 828944

Far right of the picture: The factory amp is sandwiched between the ECU and the dash speaker. Unplug the two white connectors that are facing left (towards the glove box).

 

[OG 91 LC]

Far right of the picture: The factory amp is sandwiched between the ECU and the dash speaker. Unplug the two white connectors that are facing left (towards the glove box).

Cool. Thanks.

 

[blkprj80]

I think I have more issues than just that. View attachment 828929

I think you got RATS! Something's done some serious damage there! It actually doesn't look too bad.

Go after the non factory stuff first. That's usually the most common problem.

 

[bmw635]

Let me take this back to the basic since I was there helping Al.

Can some one let us know where the center dome wiring goes back to where? Both of the dark blue wires seem to be overloaded, burned the insulation. Both of these wires grounded to the body.

Do you know where the yellow wire with silver band / stripe (burnt insulation) goes and what it is since it seems to be over loaded and burnt right at the fuse box by the knee then goes back to the firewall, under the main fuse by the battery, then into the loom toward the engine bay?

The messy stereo connector can be left unplug until we figure out what caused the burnt yellow /silver band wire by the knee fuse box and the 2 blue wires on the center dome since there's no other wires by the center dome.

I know BMW fairly we'll but hard to understand Toyota schematic, kind like Greek to me. TIA.

Peter

 

[OG 91 LC]

Okay. Here is the latest. And just when I was starting to feel better about this "electrical enlightenment" (I'm trying to keep positive) I asked around for the "go-to electrical guy" around my neck of the woods. So I went to ask him about my situation and showed him some pics.

He was schooling me on having a "short" or "resistance" on this one wire that has lost its insulation. Of course I would have to bring the truck to him and that's ok. But he told me in order to to the job right he would have to see how far back into the wire loom the wire had lost its insulation. And he added if this wire shorted then it could have possibly burned all through out that circuit well into parts of the truck such as head liner and so on.

So this is what I did today.

First I want to ask you all if this is the factory connection for the second row dome light??? I don't think it is.









I wrapped the wires individually and then together.

As you can see I took picks of third row and drivers overhead dome light connections.










Second. I decided to to unwrap a bit of the wire loom from the fuse box to check on the status of this yellow wire with silver stripes. And if the wire burned further back.





I can tell that the wire def got hot and at places maybe sticking to some of the wires next it, but insulation still intact. And from the fuse box these wires seem to connect and T to another harness and wire loom.

Second major question. Do all of these wires from the fuse box connect at this T and may one replace wires to this T. Anything at this connection that would cause the wire not to burn or get hit that far back????

I can see that this yellow wire with silver stripping is all over the truck behind stereo, center dash, AC, and so on.

























I'm sure this wire is all over the place.

Third. Wiring to second row dome light.

Question. Does the connection for the second row dome light run along B-pillar on DS or PS?????
Or Neither.


Going back to second row dome light. When I first bought the truck it was running a DVD system that had been taken out and only dome light connection was left ( maybe. Go back to pics above).

I decided to cut this cable because we ( my cousin) and I felt it wasn't factory and we thought it was running all the wiring for DVD system. Check it.









Does this wire look like factory to you guys??? I'm afraid that may have cut the connection to my dome, but the colored wires don't look like the wire connection at second row dome.






Part of me is overwhelmed again and part of me keeps reminding me to breath and breath. This is just a truck. No body died. And all is good.

I just had major work done to this truck. HG and so on and so on. I didn't think electrical was gonna be an issue. I just want to enjoy my truck.

Thanks for reading. Any and all advice will be considered.

And no I haven't bought a multimeter yet.

 

[DSRTRDR]

again: do you have a multimeter, yet ?

 

[OG 91 LC]

Let me take this back to the basic since I was there helping Al. Can some one let us know where the center dome wiring goes back to where? Both of the dark blue wires seem to be overloaded, burned the insulation. Is this correct OE color and wires since the aftermarket DVD was installed there? Do you know where the yellow wire with silver band / stripe (burnt insulation) goes and what is is since it seems to be over loaded and burnt right at the fuse box by the knee then goes back to the firewall, under the main fuse by the battery, then into the loom toward the engine bay? The messy stereo connector can be left unplug until we figure out what cause the burnt yellow /silver band wire by the knee fuse box and the 2 blue wires on the center dome since there's no other wires by the center dome. I know BMW fairly we'll but hard to understand Toyota schematic, kind like Greek to me. TIA. Peter

Thanks Pete for following this thread and helping out a bunch!!!!!

Those last pics are of third row dome.

 

[bmw635]

Al,

Looks like the 2 blue wires that was burnt, exposed insulation might be OE for center dome because the plugs looks the same as rear/3rd dome AND the foam insulation in the roof where the 2 blue wires come out must be factory because it looks like clean and neat. Aftermarket wires wouldn't come out clean like that.

We'll wait to see if the guys can answer my question on the 2 wires and where it goes.

 

[OG 91 LC]

again: do you have a multimeter, yet ? and: which wires look factory according to the electrical wiring diagrams (EWD) for your year truck and which don't ? and, cutting wires because your cousin suggests so is sooo that it indicates you have no idea what your are doing

No multimeter. But will get one soon for sure

My cousin works for Toyota. He came over to uninstall viper and factory alarm that were on the truck. I think he knows his stuff.





And this wire coming down the B Pillar on DS connected at the bottom near my seat under carpet. And it looked like a connection for video/audio. So I cut.

And yes. As the title states. First time electrical. Please go easy on me.

 

[bmw635]

again: do you have a multimeter, yet ?

I checked the yellow wire with silver band and it's clean BUT the 2 blue wires in the center dome grounded to the body with my ohm meter.

 

[OG 91 LC]

I checked the yellow wire with silver band and it's clean BUT the 2 blue wires in the center dome grounded to the body with my ohm meter.

Thanks Peter.

 

[blkprj80]

If you cut that ugly wire you thought was DVD and two of the conductors are shorted together due to the way it was cut, you could easily have enough of a short circuit to pop a fuse. Or, if the end of a still hot wire was to contact the body, pop goes the fuse.

You have a wire that got so hot it melted the insulation. Sounds like someone replaced the fuse with a direct short and smoked that wire all the way through the harness. If that wire melted to ground (chassis) in one place it would continue to pop fuses. It may have also melted enough to contact other wires in your harness. You may have to follow it all the way through and pull it apart and tape up any bad spots.

I hope it isn't too bad. Make a list of things that do and don't work. The factory wiring diagram shows the location of every connector and splice. It also shows harness routing. When you "ohm to ground" if you happen to be measuring across a bulb, you may think it's shorted. Bulbs are only a few ohms sometimes.

 

[landcrshr]

Wow, alot of Q's there. I'll try to supply some A's

1st: The yellow wire distributed throughout the truck is the gauge circuit wiring (that's not a silver trace, just insignificant dots). From the fuse, that burnt wire should go to a junction point that it sounds like you found. That is the gauge circuit distribution point. You may be able to get factory replacement contacts for this (PM me for this info).

2nd: The dome circuit. I think that is the factory connector (also repairable), if you have the moon roof, the 2 wires should be black and black/white. The harness runs down the DS A-pillar.

 

[bmw635]

Wow, alot of Q's there. I'll try to supply some A's

1st: The yellow wire distributed throughout the truck is the gauge circuit wiring (that's not a silver trace, just insignificant dots). From the fuse, that burnt wire should go to a junction point that it sounds like you found. That is the gauge circuit distribution point. You may be able to get factory replacement contacts for this (PM me for this info).

2nd: The dome circuit. I think that is the factory connector (also repairable), if you have the moon roof, the 2 wires should be black and black/white. The harness runs down the DS A-pillar.

Perfect! All we need are these 2 answers. We will trace the yellow wire to see what else is tapped in. I suspect the 2 black or dark blue wires for center dome are shorted by the DS A pillar as it was the cause for no dome light symptom as reported by other Mudders- we'll trace this back to the knee fuse box and DS kick panel. Thanks for the answers.

 

[OG 91 LC]

From the fuse, that burnt wire should go to a junction point that it sounds like you found. That is the gauge circuit distribution point. You may be able to get factory replacement contacts for this (PM me for this info). So this junction uses particular contacts that may need replacing??? 2nd: The dome circuit. I think that is the factory connector (also repairable), if you have the moon roof, the 2 wires should be black and black/white. The harness runs down the DS A-pillar.

Yes. The two wires are black and black and white. Do these wires wrap around the moon roof towards the DS and connect with moonroof wiring or do they go straight across towards B pillar and then 90 toward DS A pillar??

This confirms that the big wire going down B Pillar





Was not dome connection. Makes me feel better.

Thanks landcrshr!!!!

 

[landcrshr]

You're welcome, you seem committed and I want you to succeed.

According to the diagram in the EWD, the center dome light wires go out towards the B-pillar, then make a 90 forward to the A-pillar where they are spliced together with the vanity light wiring before going down the pillar.

 

[OG 91 LC]

You're welcome, you seem committed and I want you to succeed. According to the diagram in the EWD, the center dome light wires go out towards the B-pillar, then make a 90 forward to the A-pillar where they are spliced together with the vanity light wiring before going down the pillar.

SOLID!!!!