testing heater blower, remember no dumb questions Options

[qa1142]

Ok
I get great heat when driving. But I dont think the blower is running at all.

If I start the car and pull the heat lever should it run? or only at speed? I think the j tubes and main engine cooling fan is the only one pushing air.

Thanks
W

[dmenche914]

There is a switch under the lever, the switch is only on when the lever is fully up. i recall this switch make ground to the heater blower relay (on the relay plate in engine bay behind driver seat) When the relay is energized, the fan should turn on.


Check the fan first, by using a jumper wire to connect your battery directly to the fan (positive and ground) If fan works, then move ontot eh relay, make sure it is working (try swapping with your fuel pump relay, it works cuase your car runs)

Failing that, make sure the lever switch is making good contact. If all that checks out ok, then there could be a defect in the wiring or the relay plate.


good luck, the heater blower is great to have.