93 300e 3.2 aux fans not working

[speednjay]

Fuse is good, when disconnecting coolant sensor they won’t come on. What’s the next thing to check? Relay? Module?

[Usaguy]

Originally Posted by speednjay

Fuse is good, when disconnecting coolant sensor they won’t come on.

I think it's supposed to come on when the overheating sensor makes connection with the block not the other way round


Also there is a pressure switch on the a/c receiver/drier that when it shorts the fans come on at low speed

EDIT: Because your car has a 93 M104 (HFM) then it may not have an overheating sensor it may just have 2 sensors (ecu and gauge) but i'm not sure

[speednjay]

Originally Posted by christuna

I think it's supposed to come on when the overheating sensor makes connection with the block not the other way round


Also there is a pressure switch on the a/c receiver/drier that when it shorts the fans come on at low speed

EDIT: Because your car has a 93 M104 (HFM) then it may not have an overheating sensor it may just have 2 sensors (ecu and gauge) but i'm not sure

I thought they were soppose to default to full speed when the coolant wire is off. Either way the ac on or high temp they don’t come on at all. Has 3 sensors. 1 2 and the 3 pin. I have zero power going to the fans at all

[Usaguy]

wiring diagrams with fans (I hate 93 and newer diagrams):


https://www.startekinfo.com/StarTek/outside/12264/Program/ETM/24832001.pdf


https://www.startekinfo.com/StarTek/outside/12264/Program/ETM/24072001.pdf