On 9/24/2019 9:32 PM, Clare Snyder wrote:
On Tue, 24 Sep 2019 07:56:02 -0500, Terry Coombs
wrote:

Â* So when I got my truck back from our son , lots of things that he
just couldn't be bothered to fix . One thing is the radio power supply .
He did tell me that the radio had "died" , turns out the fuse (in the
fuse block) keeps blowing . I've got the dashboard apart enough to check
the wiring harness and supply wires , can't find any cuts or anything
that looks like damaged insulation ... it works just fine sittin' in the
driveway , but within a few miles driving it blows the fuse . I figured
it was the radio/CD player unit so I got a new one , does the same thing
. I'm really puzzled by this , from the way the fuse was spattered it's
got to be a dead short to ground . I think it very unlikely that the new
radio/CD unit is bad - the old one did work when I replaced the fuse ,
for a few miles same as the new unit . This is an '86 GMC pickup , I'm
hoping someone here might be aware of a known problem area that I might
check ... I gotta have tunes !
Try checking the cig lighter circuit - on a lot of Chevy trucks the
radio and lighter share the same fuse

Â* Not on this one , the lighter is always hot . That's where I pulled
the memory power for the radio from . A Chevy truck forum post I found
indicates that on this model the radio is the only thing on that fuse .
On Friday I'll be pulling the fuse block to check for damaged wires
behind it - if I don't find any problems there I'll probably be running
a new power lead from the fuse block to the radio .

--
Snag
Yes , I'm old
and crochety - and armed .
Get outta my woods !