Question about 1994 GMC Sierra
Hi, you could have a bad ground, at the rear of the truck, or a bulb, with a crossed filiment, causing the issue. Make sure there is no corrosion at the sockets, and both rear bulbs are visibly in tact. Then make sure the ground is good at both sides. Make sure the circuit boards are good, The actual socket board, as these can corrode internally, and finally, if you have a trailer plug, make sure this is not corroded, or shorting. I feel your issue lies in one of these areas. Good luck...Coop
Posted on Oct 16, 2010
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Posted on Jan 02, 2017
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