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Cadillac Repair/1991 Cadillac Brougham - 5.7L V8


1991 cadillac brougham
1991 cadillac brougham  
hey I have a 1991 Cadillac Brougham 5.7L V8. I am having a few problems with it. when i bought it i was told it only needed a battery and fuses. I have put in a new battery and fuses,but the car wont start without a boost. and the power seat and windows on the drivers side do not work, as well as the digital dash, and the exterior limo light on the driver side. Everything on the right side of the car works, and i cannot seem to locate the fuse panel that is under the hood of the car. can you be of assistance?


I would make sure that new battery is good first. New batteries can be bad too. Remove the battery ground from the frame. Scrape or grind frame and replace cable.
If still having problems, you can buy a little ammeter that just fits on the positive cable. Have someone crank the engine and see how many amps the starter is drawing. You can consult with a parts store to see what the acceptable amperage is. You could possibly have a bad starter, or battery cable connection at the starter.

The location of the fuse panels should be in the owners manual. The power seat should not have a fuse, but a circuit breaker that could be missing.
I get suspicious as to why fuses are missing. The windows also should have a cb. I would be looking for missing circuit breakers for the windows and seat and they may be located in tha fuse box under the hood you are trying to find.

Here is the answer I got on an Internet search--"it might also be under the hood on the fire wall. there are 2 black boxes labeled fuses open those up and it should be labeled"

Find that and that might be te source of your problems. If not, get back to me.

As for the opera light. You can pull off some trim panels, turn the lights on an see if you have power going from the harness with a test light, If you do, the light is bad. If I remember right, these may have had a printed circuit board on it and they did fail.

The absolute best tool for you I could recommend and you will find it priceless, is to go on Ebay and get a 1991 Cadillac Fleetwood brougham service manual.
This will guide you through the diagnoses of any problem you have with the car for years to come and save you lots of money, doing your own repairs.

Good Luck!  

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Rob Painter


Alarm system questions cannot be answered on this forum. These systems are not what I can answer. Without being physically at the vehicle and not knowing what kind of electrical service has been done on the vehicle, there is no possible way to give an accurate answer over the internet. My expertise is in Ignition/key based anti-theft systems. These issues include GM VATS (resistor chip in key blade) PASSLOCK (MRD)-ignition lock rotation based, no special ignition key and the PKIII Transponder (computer chip in key) systems. These systems are not alarm based and are integral with the starting of the engine. This is why I cannot diagnose alarm problems without physically looking at the vehicle: Alarm systems are a completely different annimal than ignition key/lock based anti-theft system. Many alarm questions come from vehicles 10 years old, and since older, many hands that had been involved over the years.I am an expert in all GM factory (ignition/key based)systems. Alarm system questions pose to many situations beyond my knowledge as to what has been done to the vehicle over the years. Some guy may have actually wired the stereo into the alarm system. Who knows? Over my past 30 years in vehicle wiring repair, I have seen unbelievable wiring disaters done by guys that consider themselves "mechanics." I have seen stereos and alarms intalled using surgical tape. I have seen modules burn up, un-fused circuits, wiring jambed between the doors and even lamp cord used for a starter kill. To answer alarm questions over the internet without examining the vehicle is like asking; What does it take to remove a dent?


Education/Credentials-ASE certified. 11 years with a GM dealer and 17 years with a repair facility dealing with only the repair of theft recovered vehicles.

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