Cooling Fan Question

[Ruffiano]

So to give you some background, I recently finished my engine swap, CQ with a standard 7A engine, now has an ABY/AAN hybrid engine installed. I used the ABY Engine harness.

Now my current problem is an over heating problem. The engine fan is not coming on. I tried jumpering the temperature sensor at the bottom of the radiator and sure enough it kicked right on... So I assumed that the problem was the sensor, I had a spare known working on that I swapped on. Now similar problem, the fan will kick on to the low speed but it won't kick on to the higher speeds, it also doesn't seem to run after the car is shut down like it used to. My temperature gauge in the instrument cluster is working fine and that is what I'm basing the temperature settings off of. The car is getting too hot and I need to find the source of this problem.

So my main question is what triggers this fan to come on? is it simply this switch that I have replaced, or does this switch somehow integrate into the main wiring harness and i have failed to hook something together?

[mcandmar]

The after run fan on a 7A is triggered by a small temp sensor mounted to the cam cover (measures ambient temp, triggers ~85c). It always come on with a warm engine. On an ABY/AAN the sensor is on the water manifold and dosent come on every time, there is a thread on here discussing various replacement sensors as the stock unit has a very high temp rating, something close to 100c from memory.

Also worth noting is the elecy water pump should kick in with the after run fan. It should also run for a few seconds every time the ignition is turned on.

There is a different fan and resistor pack on ABYs, and as far as i know they are three speed fan where as the 7A fan is only a two speed. How they are triggered and wired i dont know, S2central would be the best person to help you with that...

Mark