Does the intercooler pump run continuously while the car is running? or Does it run only after a certain temp is reached?
I replaced my original pump today (with a Johnson). It was bad and would not run when bench tested either.
After the swap, I started the car cold and let it run up to normal temp (radiator fan came on..low speed once). The I/C pump never came on.
I disconnected the wiring connector (harness side) from the pump and ran 12v directly to the pump ..and it does run.
I then put a meter to the harness side while the car was running to check for "turn on voltage"....nothing...
Am I looking at also a bad air charge temp sensor or does the car need to be put under a load "driven" to get it up to proper temp for the I/C pump to add cooling.

 

I'm not sure if it runs continuously but if you haven't yet check fuse #13. If it's blown the pump won't work.

 

Well I guess I've answered my own question.
After letting the car sit for a while (HEAT SOAK), I restarted it. Within a few seconds, the I/C pump began to run.
So I believe the the intake plenum must reach a pre-determined temp before it callS for cooling from the pump.

 

it has a temp sensor of it's own...

 

Innercooler pump starts at about 1300 rpm and then stays on as long as you drive it, see my posts on the topic. Woody

 

It definitely began running a few seconds after re-starting the car ...after bringing up operating temp, then sitting for about 15 minutes.
I'm satisfied that it is now repaired, since the one I removed would not even run when bench testing.
I've got a set of factory manuals coming, so hopefully I will come to fully understand how the circuits are set up.
These cars are new to me and I'm at the front of the learning curve.