On 9/27/2019 11:11 PM, Clare Snyder wrote:
On Thu, 26 Sep 2019 20:58:14 -0500, Terry Coombs
wrote:

Â* Someone posted a link to the GM shop manual , which indicates that
the radio is NOT alone on that fuse circuit . I'm sure about some items
, but don't know what/where the time delay relay and emission control
solenoid are ... I figured with your history you might be able to help
me figure it out . I'm assuming both are part of the emissions stuff -
most of which has been long since removed .
Year, engine and transmission again? Emission control solenoid
sounds like canister vent solenoid?? The only time delay relay in the
engine system I can think of was for transmission controlled spark
system in the early seventies - (70-71 without A.I.R.)

The only "time delay relay" I can thinkof in a 1986 vehicle would be
in the wiper system - intermittent wiper relay.

The evap control solenoid valve is back on the evap canister above the
back of the muffler somewhere. The wire back to the evap solenoid
could very well be chaffed through anywhere between the fuse box and
the back of the truck - again I would check the wiring harness in the
area of the replaced transmission first.
Â*Â* Thanks Clare . It's a 1986 GMC 1500 p/u with a 305 V8 and a 700R4 .
No wiper delay , and the evap canister is up by the radiator on the
driver's side . I went over the wiring in the engine compartment
yesterday AM , found no frayed or rubbed insulation (but did find a lot
of grunge). The only place I found that had any sign of damage at all
was on a bundle that crosses over the steering column , where the
ignition switch rod had rubbed a small spot , but not all the way thru
the wrap and the radio supply isn't in that harness . I've put the dash
back together enough to drive the truck but left the radio out . We'll
see if that fuse blows again w/out it installed . Since both radios have
a fuse in the power lead that hasn't blown I figure it pretty much has
to be a fault in the truck wiring . I'm just really frustrated that I
can't find anything . I'm considering pulling power from another
switched source , whether ignition or accessory isn't critical to me
since I don't listen to the radio with the motor off .

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