no break lights on 86 740 gle

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Old 12-03-2007, 11:02 AM
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Default no break lights on 86 740 gle

With lights on no break lights . With lights offno break lights. I've changed all bulbs and cleaned the contacts, even replaced the brake switch. The fuse is OK. Tried wiggling the ignition switch. Still no break lights. All the tail lights work just not the break lights. Need help!![sm=WTFsgign.gif]
 
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Old 12-03-2007, 09:09 PM
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Default RE: no break lights on 86 740 gle

Next thing to check is the bulb failure warning relay, the big red circular one on the driver's side.

 
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Old 12-04-2007, 07:49 PM
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Default RE: no break lights on 86 740 gle

Hello!
I checked out the relay today and it functions, I put it to work on my test bench (I'm an electronic and pnumatics tech for a medical device company). My relay tester indicated that electricly nothing is wrong.
I did order some new circuit boards and when they arive I'll give them a try.
Just totaly stumped on this.
 
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Old 12-05-2007, 09:48 AM
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Default RE: no break lights on 86 740 gle

how about the pedal switch? That button could have gone bad.
 
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