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I have a 1990 Cadillac Seville and I am having trouble with my headlights and electronic dash. Periodically my automatic headlights will flash on and off and there is no consistency to this; very random. I also have this issue with my electronic dash getting very bright and then dim. When my headlights go off I typically turn my headlight selector to off then back on, this typically gets the lights to come back on; however they still randomly turn on and off after this. The time between on and off can be 10 minutes or they'll actually start to flash.

Submitted: 390 days and 10 hours ago.

Category: Car

Value: $15

Status: CLOSED

1990 Cadillac Seville V8

Already Tried:
I have not done anything so far. The lights go off randomly when the headlight selector switch is set to automatic. When I turn the switch to off then on the lights come back on and typically don't flash for a little while. This has been happening for the past 2 years but has gotten much more consistent over the past month.

Posted by John 390 days and 3 hours ago.

Answer

Hello XXXXXXXXX,
Most likely this problem is caused by a faulty Body Control Module with an intermitten internal fault on one of the circuit boards.One thing to check first is the ambient light control sensor for the BCM.Turning the lights off manually overrides the computer control.When you turn the lights back on the computer goes into a timer set for automatic operations.

389 days and 14 hours ago.

Reply

So do you think replacing the light control switch will help? If it is a short somewhere then there will need to be an electrical test to find it. I typically fix this car on my own and in this case I'm not exactly sure what to replace; with electrical I think a certified mechanic may be better suited. Please let me know if you think replacing the switch will help or if further diognostics need to be done.

Accepted Answer

I think in this case further diagnostics are needed.To find a problem such as this,the problem will need to show itself for a proper diagnosis.I do not believe the light control switch is the problem.

Accepts:
Expert:	John
Pos. Feedback:	97.7 %
Answered:	10/28/2008

Master Automotive Technician

ASE A1-A8 & L1 Master GM Tech 40 years experience

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Accepted Answer

I think in this case further diagnostics are needed.To find a problem such as this,the problem will need to show itself for a proper diagnosis.I do not believe the light control switch is the problem.

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I think in this case further diagnostics are needed.To find a problem such as this,the problem will need to show itself for a proper diagnosis.I do not believe the light control switch is the problem.

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