[V6-12v] Testing the cruise control vacuum pump (figured it out)

[Tom Christiansen]

Folks,

Here's how you test the vacuum pump:

There are three terminals on the connector for the pump:
#1) "Left" terminal with blue/red wire
#2) "Top" terminal with brown/red wire
#3) "Right" terminal with green/black wire

Test procedure:

1) Connect Mity-Vac or pressure/vacuum gauge to the hose connection of the
pump.
2) Connect the Ground/Minus connection of a 12 V power supply to terminal #1
3) Connect the Plus connection of the 12 V power supply to terminal #3
3a) There should be an audible click from the pump
4) Connect the Plus connection of the 12 V power supply to terminals #2 and
#3 simultaneously.
4a) The pump should start running and vacuum should be indicated on the
vacuum gauge.
4b) If the 12 V to terminal #3 is disconnected, the vacuum should drop to
zero. The pump should keep running.


Tom