Well, I've got the one with the round connector, the "steaming POS,"
but
(They both have the same round connector, but the better design also
has a 2-pin rectangular connector. The wiring of these two round
connectors is of course quite different.)
hey, it actually works when it's plugged in! It functions properly
when the
driver's door is locked and unlocked. However, there must be a leak
somewhere because the pump never cycles off when it's hooked into the
system. I'm assuming that it must sense vacuum/pressure and cycle off
once
the doors are locked/unlocked.
It has not one, but _two_ long-throw small-diameter snap-action
diaphragm switch/valves inside. Huge wear points. Non-replaceable
parts. Also an electronics board to time-out the motor if it doesn't
shut off after awhile. Made by Hella, IIRC.
The superior replacement design has a small short-throw bidirectional
pressure switch, signal size not power size, and electronics to operate
it. Its motor runs one way for pressure, the other for vacuum. The
POS has moving valves to make the switch, and the motor only runs one
way. (It's a piston pump, actually that part looks pretty good. It
wouldn't matter which way the motor ran.) The new design has a rotary
pump of some sort.
The only way I could get it to stop running was either plugging the
outlet
with my finger (big nono according to Jim C), or by unplugging it. The
No, that's perfectly fine and the way you test the pump itself. If
yours
snapped (when both sucking and blowing) and shut off right away when
corked off rather than running on for awhile then it's (still) good.
In which case you have a leaking line or actuator. I recommend looking
in the trunk area first, those seem to be, for whatever reason, more
fragile than what's in the doors. You can cork off the line where
it goes to the filler flap door lock and trunk, if you re-plumb as
required to get the doors hooked to the pump. For that you'll just
have to work it out 'by eye', I no longer remember exactly how mine
was plumbed and yours might be a little different anyway. But it
ain't rocket science, it's just a single pipe that goes (eventually)
to six places. Seven, if you count the pump itself.
Another question is where the heck does the pump mount? Mine was just
lying
on the right side of the spare tire well with a foamy cover around it
and a
The SDL's (new-style) pump is mounted inside a foam football that's
attached in the RR corner of the spare tire well with a plastic bracket
and two plastic expand-o-screws. I'd expect the older car to have
something very similar.
If your old-style pump dies I believe it is possible to retrofit a
new-style pump to it, but I have never done so.
-- Jim
