Braking makes my headlights pop up!

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Braking makes my headlights pop up!

Postby mark165 » Fri Aug 22, 2014 3:17 pm

I was wondering if anyone could help me here, I'm a bit (completely) stuck on this one...

ST165 - Ignition on or car running - No stoplights, tail lights, instrument gauge lights.

Indicators ok.

Press the brake pedal - headlights pop up with lights on. Can't get them back down unless the key is removed.

Turn the heater blower to one mark past low - headlights pop up with lights on. Can't get them back down unless the key is removed.

Can anyone shed any light? Any suggestions gratefully received.
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Re: Braking makes my headlights pop up!

Postby underscore » Fri Aug 22, 2014 3:26 pm

Sounds like you have a short or backfeeding somewhere, is it braking while moving, or just pressing the pedal in general?
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Re: Braking makes my headlights pop up!

Postby mark165 » Fri Aug 22, 2014 3:32 pm

Can make it do it regardless of stationary engine off or driving along.
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Re: Braking makes my headlights pop up!

Postby monkracing29 » Fri Aug 22, 2014 3:41 pm

interesting. I just fixed my tail light wiring when i hit brakes the parking lights would turn on. i had a short in one of the brake light wires that would backfeed power on the brakes to the parking light circuit
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Re: Braking makes my headlights pop up!

Postby MWP » Fri Aug 22, 2014 3:47 pm

It'll be a bad grounding.

Check all the grounding bolts to the chassis under the dash, center console and the kick panels.
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Re: Braking makes my headlights pop up!

Postby mark165 » Fri Aug 22, 2014 3:56 pm

Thanks for all the suggestions and help so far.

Where are the grounding points inside the car?
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Re: Braking makes my headlights pop up!

Postby MWP » Sat Aug 23, 2014 5:00 am

Not sure for a 165.
Start pulling off the plastic panels and see what you find.
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Re: Braking makes my headlights pop up!

Postby mark165 » Sat Aug 23, 2014 5:10 pm

Spent far too long on this today, sad to report it was self inflicted.

Those fuses in the board by the kick panel, where they say no fuse, turns out actually one of them needed a link. Problem solved.
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Re: Braking makes my headlights pop up!

Postby MWP » Sun Aug 24, 2014 2:34 am

Very strange that lack of a fuse would cause that.
Oh well, nice work finding the problem.
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