This Suburban came in with the complaint that the turn signal fuse blows. The customer could not relate when the fuse would blow and it would not blow when it came in the shop. I first went to the rear and and inspected the wiring there and found no problems. Next I turned my attention to the front of the Suburban.
I removed the front turn signal / park light assemblies and there it was. I did not really surprise me though because it is such a common problem in this series of trucks. Although normally the park light fuse is the one that has the problem. The following picture shows where the wires had been rubbing (rust spot).
You can see the rust transfer onto the wires in the following picture.
After cleaning the wires it is very clear where the light blue turn signal wire was shorting to ground. The brown park light wire was undamaged and the black ground wire was slightly rubbed but not shorting. I cut and spliced the wire back together using a piece of dual wall heat shrink tubing to cover the splice.
I was experiencing a similar issue on my ’97. When I turned the left signal, it was extremely dim, but not the right and would not power my trailer lights at all. I saw this so I pulled out the front signal lens and boom, the same wire shorting in the same spot.
Thanks for posting this, it saved me potentially hours of wire chasing.