87 5KTQ OEM Stereo Intermittent Problem

[Bernard Littau]

> Bill Rowe writes:
> > sound from rear speakers is sometimes faint or nil.  when it works
properly
> > sound is great (for a stock unit, that is).  checked wires from rear amp
to
> > rear speakers and all looks ok.  is my intermittent problem the amp,
> > speakers, or stereo.  any btdt's?  thanx.
>
> I believe your car has the "Duo sound" unit on the rear shelf?  Maybe
> the switch on that unit is not making good contact.  Try popping it out
> and have a look.

On my '88 5ktq, I had one speaker in the rear intermittent.  I checked the
"Duo sound" thingie, and found the circuit board was cracked along one of
the contacts.  As I never plan on using the "cut out the rear speakers and
pipe audio to the headphones" position, I cut the circuit board with a fine
saw, removing the switches, and then soldered the contacts for permanent
rear speaker connection.  Now my rear speakers work just fine.

You could likely effect the same repair with some paper clips or other wire
shoved down the connector for the circuit board.  As I recollect, I tested
it this way before doing the circuit board modification.

Best,

Bernard Littau
Woodinville, WA
'88 5ktq