Hello all. Rebuilt 350 in my 84 Z, no ECM, single fan. I didn't run the wiring for the fan so I'm tryng to do some troubleshooting. It wasn't turning on at all until I found the blown inline fuse. Replaced that. At the same time I replaced the fan switch in the manifold because it was provided by a shop that did poor work and I wanted to play it safe. Now the fan comes on with the ignition. Red to battery, blue to fan, white to fan switch, and I assume yellow to ignition? Any idea what I should be looking for?

 

That is aftermarket fan control-Hayden i think.The turn-on temp might be set too low- that little blue box with the white screwdriver slot is the temp adjust.The sender normally used with this type fan control is a varible resistance thermistor instead of on-off switch.

 

So I'm assuming I'd either have to go back to the other switch, or replace the relay to a more standard one? Or can it be made to work as is by adjusting the screw?

 

also make sure the sender threaded brass part is grounded to the engine-thread tape or too much sealant might prevent the sender from grounding properly. A knock sensor module is seen in your pics and that indicates your car is L69 H.O. and came with e-fan originally-there might be remains of original fan circuit still in place.Do you know if the fan itself is original or aftermarket?

 

The engine is out of an early 90s pickup. It was stripped down to the block and rebuilt from scratch. I believe the fan was pulled out of a different Camaro if I remember correctly.

The fan switch came with something on the threading when I bought it, I didn't add any tape or sealant.

 

Update. Tried using a more standard relay but no luck. When I unplugged the fan switch and tried grounding it to turn the fan on, all I get is a clicking by where the ignition wire taps in. Is that normal or is there a different issue here?

 

While you are right in the area I suggest you fix the throttle return spring. Does not look safe.