In Reply to: Re: Foglight check control - Help (more) posted by Jim Cash on January 27, 2000 at 17:04:33:
: : My foglight check control (CHECK FRONT FOGLAMPS) comes
: : on for no reason. Then, I turn on my foglights and
: : the check control goes off????????
: : This has been going on for two weeks, every time I
: : start or turnoff the car - "CHECK FRONT FOGLAMPS"
: : always come on - the only way to shut it off is
: : to turn on my foglights (which of course work).
: : My dealership has no idea.
: : Anyone with a solutio? Thanks in advance.
: I would suspect a high resistance in the bulb connector, or a partially deteriorated filament in one of the bulbs.
: The system checks the bulb circuits when they are on, and whenthey are off. It does it whenthey are off by sending a very brief 12v pulse to the bulbs every 2 seconds - does not light the lights because the pulse is just a few milliseconds in duration. This is enough to check that the circuit is within resistance specifications.
: So if there is any corrosion in the connection,or the bulb is now beyond tolerances the system will report a fault.
: Applying fulkl voltage by turning on the lights will often overcome any small extra resistance in the circuit and your lights will seem to operate properly - but there will be a reduction in current and light due to the extra resistance in the circuit.
: Try cleaning the connections at the bulb, or replacing the bulbs.
: You have to pull off the small grill beside the foglight to get access. Remove small plastic rivits under top lip of grill piece and then just pull it out - pull hard.
: Jim Cash