On 9/28/2019 1:05 PM, Clare Snyder wrote:
On Sat, 28 Sep 2019 00:11:39 -0400, 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.
The 700R has a lockupo converter.
The lockup power comes from an Acc power plug right above the RDO fuse
(radio) and is a brown and white wire in a brown plug. Disconnect that
brown plug and see what happens. Not an uncommon problem -
particularly if some hamfisted hillbilly wrench changed the
transmission - - - - - - That "acc" plug is powered by the 15 amp
radio fuse.

Â* Well , it's definite now that the fault is in the wiring . I left the
radio out , the fuse was blown when I got to town . That lockup wire
will be on the connector that hooks to the trams along with the backup
light switch etc ? FWIW the hamfisted HACK that installed it is my son .
He definitely ain't a hillbilly ... he's a flat-lander ! And he's for
sure a hack , couldn't be bothered to actually finish the installation
by changing out the speedo drive . I wonder if I can check that with my
digital meter . Leave the fuse out , set it on beep and run the truck up
to highway speed . If that's it it should start beeping when the trans
lockup is supposed to engage . That would also explain (at least
partially) the lousy mileage it's getting and the fuse not blowing until
I'm on the highway . Is there a cure for this problem that will keep the
lockup functional ?
Â*I really appreciate your help with this , it's been running me in
circles . Gettin' nothing but dizzy trying to figure it out .

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