Re: Headlights come on when braking!-failed 1157 bulb - Saab 9-5 Bulletin Board - Saabnet.com
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Re: Headlights come on when braking!-failed 1157 bulb
Posted by Whirligigmike [Email] (more from Whirligigmike) on Mon, 18 Jan 2016 13:24:22
In Reply to: Re: Headlights come on when braking!, Dean, Mon, 18 Jan 2016 08:56:23
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Thanx to all for the quick replies!
I was sceptical that the cause could be bulb related. I really expected to be doing circuit board repair to the headlight relay. But, checking the bulbs was the quickest and easiest thing to do first.
I removed both bulbs, and checked for the problem. Problem solved, no headlights with brake activation. Replaced both with new 1157 bulbs, normal function. That was Waaay Tooo simple!
Close inspection of one bulb found one filament and filament support wire melted/fused/shorted to the other support, effectively joining the running lights and the brake light circuits.
Hopefully the photo will post below!
Thanx, one and all,
mike
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