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'96 Bonneville Electrical Problems

Old 08-23-2005, 01:19 AM
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Default '96 Bonneville Electrical Problems

Hey all. I thought I would start a new thread as this is a different problem then the engine RPM'* and what not...

A few days ago, my Power Locks, Power Antenna and Interior Lights stopped working, all at once. I could sit in the car and hit the power lock button and it would *attempt* to lock the doors, but it was as if it was not getting enough power, and the BCM would buzz. Also, the Fog Lights were working as the Interior Lights. IE: When you opened a door, the Fog Lights would come on at around 10% brightness and when you hit the Lock button on the remote with all doors shut, the main headlights blink (it always does this as confirmation) *1* fog light blinks (usually both blink, same as the headlights) and the horn chirps. However, the locks only *try* to work. With any door open, you don't get anything from the locks at all. Not with the remote, not with the button and not by putting the car into Drive (which usually locks the doors) or shutting the car off (which usually unlocks the doors). As I said though, if the doors are closed, 9 times out of 10 they try to lock or unlock. So, I tried another BCM. No change. I then was told by someone to try checking out the BCM'* ground wire on the passenger side under the dash. I moved it around a bit and it all functions started to work properly again. The only difference was that the keyless entry remote had a much more limited range, but that could be batteries or something else. Anyhow, I decided to clean the ground wire up really well, so I took it off cleaned it up and hooked it back up. When it touched the metal of the car it sparked (normal?), but I hooked it up anyhow. Now, the same problem is back. Exactly the same as before. I tried another BCM again and the only difference this time is the BCM will occasionally beep when I press the Lock button too many times in a row and the 'Fasten Seatbelts' light will try to come on the dash board when this happens (even though the seatbelt is on). Also, if I turn the car on with the seat belt off, the 'Fasten Seatbelts' light comes on, but it goes off if I turn the headlights on with the headlight switch.

Very confusing I know, but *any* help will be very appreciated.

P.*. The only thing that has been done to the car electronically speaking was the installation of a power antenna that I got out of a Caddy. It plugged in perfectly and worked perfectly for many days before this all started.
Old 08-23-2005, 09:28 AM
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This one will require someone with a 96 FSM that knows how to read schematics. We need all the common wires and components to all your symptoms.
Old 08-23-2005, 10:31 AM
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Yikes! OK, Bill, you know I have the 97 FSMs and..............if no one chimes in, I am willing to try to help! (Electrical is NOT my strong point )
Old 08-23-2005, 11:44 AM
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This is going to be a bear. You have to trace back each of his symptoms until you find the common point. Then the problem is from there up.
Old 08-23-2005, 01:42 PM
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Originally Posted by willwren
This is going to be a bear. You have to trace back each of his symptoms until you find the common point. Then the problem is from there up.


Well, once again, if an electrical brain doesn't bail me out, I'll give it a shot (May need some handholding though) Reading the symptoms, I think most of those things run through the Remote Function Acuator (RFA) module, just a thought :?:

Even if I can't help out, I will follow the thread with FSM by my side.

Damn, I should've listened to my father when he said to study electrical engineering when I went to college
Old 08-23-2005, 03:43 PM
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Originally Posted by Echo SSEI
Originally Posted by willwren
This is going to be a bear. You have to trace back each of his symptoms until you find the common point. Then the problem is from there up.


Well, once again, if an electrical brain doesn't bail me out, I'll give it a shot (May need some handholding though) Reading the symptoms, I think most of those things run through the Remote Function Acuator (RFA) module, just a thought :?:

Even if I can't help out, I will follow the thread with FSM by my side.

Damn, I should've listened to my father when he said to study electrical engineering when I went to college
Bob..I know you said you were ready to help out and had the FSM by your side all weekend. You know how it goes.. you are still on duty.
Old 08-23-2005, 04:24 PM
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Originally Posted by BillBoost37
Bob..I know you said you were ready to help out and had the FSM by your side all weekend. You know how it goes.. you are still on duty.


Oh, good, now the two Bill'* can help you out, orbitz!

(Bob runs for the door)

...I'll be following the thread
...with the FSM by my side
...Have fun fellas
Old 08-23-2005, 05:00 PM
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Any help is appreciated!!
I went out an hour or two ago to take another look at a few things. Played the CD player for about 15 mins and tried to start the car but it wouldn't start. It tried too for about half a second then all I got was clicking. One quick boost and it started right up. I am thinking that the Fog lights stayed on all night at the 10% brightness, thus allowing the CD player to work but not leaving enough power for the engine to start. :(
Old 08-23-2005, 10:30 PM
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As Bob knows (yes you do Bob) it'* just like Bill 1 said. Most likely it'* either a faulty component or a bad ground. You checked on ground... wouldn't be a bad idea to keep going. Maybe you find some fubar'd wires somewhere while you are looking and cleaning grounds.
Old 08-23-2005, 10:36 PM
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I have been checking all of the grounds I can find, but what is this "Remote Function Acuator (RFA) module" that he spoke of? Where is it located and what does it do? If it may be causing the problem I have another '96 Bonneville at a local scrap yard that I can get parts off of to test that theory.

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