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Old 05-15-2010, 01:33 AM   #1
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Default Electrical Issues - all of them 2000 Bonn

Hey,

Thanks to some very helpful members I've stripped the interior of my 2000 Bonneville (clogged AC drain, soaked everything)

My car has had electrical issues for the past 3 years. It started with just the front passenger window stuttering until it refused to work. Like a spreading virus, everything in the cab failed one by one until now all I have is the Driver side power window which stutters when its humid (lorida) but works fine when the weather is bone dry warm.

I've stripped the interior out and have access to all the wires, harnesses etc. I really need help/advice on what to test.

Symptoms (in order of failure);

- Central locking stopped working
- Power mirrors stopped working
- Power windows stopped working except for Driver side which stutters (relay?)
- Cab lights sometimes stay on
- Door ajar light stays on if the engine is running and someone opens a door.
- Door ajar light turns off if all the doors are shut prior to starting the engine.
- Intermittently get the "Security" light
- Intermittently get the "Air Bag" light
- High Beam indicator light (dash board) stays on when high beams are turned off. Toggling the light switch or flashing the beams turns the indicator off.
- Shifter backlight stopped working (P-R-N-D-etc) is not lit up.
- Dashboard backlight surges bright - dim - bright - normal.
- Drivers door only activates the interior light and key-in-ignition alarm (door open).



I pried open the passenger and driver side wire buses (plastic cover things sitting on the floor). Drivers side had water, passenger was dry. Drivers side had a terminal with 8 yellow wires going in. This was wet and looked like it shorted out at one point. I cleaned this up and greased/reassembled.

I went and wiped out and greased all the grounding connections that are under the seats and screwed into the floor chassis.

Battery terminals are clean. Battery ground to chassis cleaned and greased too. Hooked up the battery and tested the windows. Same problem. From a visual inspection, all the wires are good and anything that could be wet has been cleaned up (I think).

Any ideas where and what to look for? What are my options now? Bad driver side switch center? Control Module?

Thanks for reading and appologies for a long winded post.

Last edited by bonnevillefl; 05-15-2010 at 02:47 PM.
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Old 05-15-2010, 01:36 AM   #2
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check out under the rear seat fuse box. had another member that was plagued by electrical issues and that was the issue his car looked like the titanic before it was all cleaned up. but it works perfect now
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Old 05-15-2010, 02:51 AM   #3
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Quote:
Originally Posted by sawgunner View Post
check out under the rear seat fuse box. had another member that was plagued by electrical issues and that was the issue his car looked like the titanic before it was all cleaned up. but it works perfect now
titanic? now that is funny

the fuse box looked ok earlier today. i'll take another look tomorrow. i know the water did not get that high, stayed low around the battery.

thanks!
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Old 05-15-2010, 04:03 AM   #4
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pop the entire fuse box up and look underneath. ususally the top will look fine but all the corrosion is underneath
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Old 05-15-2010, 08:52 AM   #5
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I'm with Steve here, look at the under side of the fuse box. What you describe sounds like corrosion. As it spread it took more systems with it. Look for a whitish powder, then start cleaning.
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Old 05-15-2010, 11:15 AM   #6
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Thanks for the suggestion! I agree, progressive failure sounds like corrosion of some sort but it doesn't appear to be the back seat fuse box.

I pulled the fuse box out of the mounting bracket and inspected all the wires feeding into the grid of grey/black square sockets. It'* completely clean. No white or green powder. Bare clean metal. I pulled fuses and they were all clean too.

The fuse housing bracket was bone dry. No water nor signs there ever was. I opened the plastic wiring bus running along the back seat and it was bone dry/clean too. Wires looked good.

I went back over all the wiring on the floor and checked the wiring at the drivers door hinge - everything looks new. No cracks or worn insulation.

One time a bit of rain water got into the Drivers side window switches. The door was open long enough to get in and sit down, but it was a Florida storm. About a month later I lost control of the passenger window. I tried to pull that apart once but it was sealed tight.

Last edited by bonnevillefl; 05-15-2010 at 02:38 PM.
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Old 05-15-2010, 12:19 PM   #7
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I will try to get some info on the drivers door module and the dash integration module too, most of that seems to have something to do with that if you don't find any corrosion.
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Old 05-15-2010, 01:04 PM   #8
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We've had members with similiar issues, as noted in the thread; and it might require the seats to be removed and the carpet to be pulled. Several wires and junctions are under the floor and if you had any water sloshing under the carpet, those wire may have corrosion as well. Worth a look!
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Old 05-15-2010, 02:46 PM   #9
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Quote:
Originally Posted by Purplehazeir View Post
We've had members with similiar issues, as noted in the thread; and it might require the seats to be removed and the carpet to be pulled. Several wires and junctions are under the floor and if you had any water sloshing under the carpet, those wire may have corrosion as well. Worth a look!
Hi Purplehazeir - yeah that'* where I am now. Everything is stripped out, carpet drying in the sun as we speak. I found only one junction on the driver side soaked. 2 of the pins had black arc and green powder. I cleaned all that up. A few grounding junctions had a bit of water but were all clean.

So I've inspected all the wiring I could find. Opened up all the junctions I could find. Re-seated the grounds and cleaned/greased everything along the way. Absolutely no change in the electrical situation.

Another symptom;

- only the drivers door activates the interior light and key-in-ignition alarm (door open).
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Old 05-15-2010, 02:51 PM   #10
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That'* sounding more and more like a problem with the data communication between the door modules and the dash integration module.
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