Blinkers shorting

[Reggieburns]

Replace fuse drive replace again. 3 times.
87 Chevrolet short box

 

[jetman]

Replace fuse drive replace again. 3 times.
87 Chevrolet short box

Could be a short in the wiring to the blinkers. As a 1st effort to identify a short I would pull the bad fuse, insert a car horn in place of the fuse via some jumper wires & push-on terminals. Jostle wiring and see if you can locate the short..

 

[Georgeb]

Has there been any work done to the truck recently? that may give you a place to start looking. Otherwise start by checking all the sockets and tracing wiring looking for damage or a short to ground. Here is a simple scematic to look at. Sorry about the quality I am 1000 miles from home so this is the best I have.