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1998 GMC Sierra 350

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Man of Steel
New User

Jul 3, 2016, 10:09 AM

Post #1 of 3 (1043 views)
1998 GMC Sierra 350 Sign In

Signal (left only) goes solid when brake light applied.
Pulled all lamps swapped exchanged sides replaced, cleaned tested sockets.
Fully inspected rear trailer hook up, pulled apart harness, also inspected harness at other locations.
Still occurs ( on dash indicators) when rear harness detached, and all front lamps removed.
Replaced the signal light switch on column, and blinker relay, lamps.
Cleaned and added grounds to front and rear.

Brake light switch has not been replaced but works fine on the right side, i dont suspect it the culprit.

Please weigh in. I am a little challenged on this one.

Ultimate Carjunky / Moderator
Discretesignals profile image

Jul 3, 2016, 10:47 AM

Post #2 of 3 (1016 views)
Re: 1998 GMC Sierra 350 Sign In

If you take the right tail lamp assembly and plug it into the left tail lamp connector, does it do the same thing?

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

Man of Steel
New User

Jul 4, 2016, 7:25 AM

Post #3 of 3 (995 views)
Re: 1998 GMC Sierra 350 Sign In

Yes swapped everything. I have thrown in the towel its at the mechanic.

(This post was edited by Man of Steel on Jul 4, 2016, 7:27 AM)

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