Elec system going nuts, Horn honks, lights dim.. WTF! Options

[JoeyIsFunny]

I bought my 94 stx from a friend yesterday, and she conveniently failed to mention that the electrical system is kinda funky. It only happens at certain times, but what happens is that Ill hear a little click, and the horn will honk, the clock and dash lights will dim and who knows what else is goin on that I cant see when its happening. It only happens for a split second, but it will do it like 3 times in a row... stop for like 20 secs.. do it 4 times... then stop for.. like half an hour. Then repeat.

Im taking it in tomarrow to get it checked out, hopefully its just a bad fuse or something.. any advice?? This happen to anyone else?

[Coomer]

Does the car have an alarm or keyless entry?

[JoeyIsFunny]

Yes, there is an alarm. The little light for that goes on and off too. I JUST got the car yesterday, so I dont know much of the history of the car besides the papers she gave me of maintenence.

She mentioned that she doesnt think the alarm system works. Could this be affecting anything?

[Coomer]

When the interior lights dim, is it like how the lights dim when the parking lights are turned on?

[Hanyo]

i think its the keyless entry messing things up.. try removing the brian of the unit and seee if that helps..

My friends old keyless entry would unlock his doors in the middle of the night!

[JoeyIsFunny]

When the interior lights dim, is it like how the lights dim when the parking lights are turned on?
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Yes it is! Also, they installed some foglights, and only one works. This may be because the bulb burned out, but theres always a chance of faulty wiring...

  i think its the keyless entry messing things up.. try removing the brian of the unit and seee if that helps..

My friends old keyless entry would unlock his doors in the middle of the night!

No, I dont have keyless entry.

This post has been edited by JoeyIsFunny: Apr 24, 2005 - 7:33 PM

[Coomer]

OK,
I bet it's your alarm system, pulsing the siren/horn output and the parking lights output.

Find where that click is coming from...that's probably the brain of the alarm, or maybe a relay that has wires you can trace to the alarm brain. Once you find the alarm brain, search for a red wire with a fuse in it. Pull the fuse, then drive the car for a while to make sure everything still works perfectly, and see if the problem comes back.

If it doesn't and everything works, then go to work removing the alarm when you get a chance.

[JoeyIsFunny]

Thanks man, its in the shop now, and i asked them to look at it, they will get to it tomarrow. So Ill see if they come up with that, if not, Ill tell them to deactivate the alarm.