hellp i got a 87 s-15 gmc jimmy that keeps blowing lower right fuse in the fuse box truck will start and run for 1 min that puff i see no visible frayed wires could it be something else than the ECM???

I have a question, why are you in the Fbody off topic section asking this question? :smh:

What does this fuse control?

the ecm is possibly fried