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Old 11-19-2015, 11:21 AM   #1
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Default 1990 Drivers side fan running all the time

I have been trying to figure out why my drivers side main fan runs all the time.
I have a DIYPNP but it is not controlling the fan. I swapped engines but the thermostat at the front water neck was still controlling the fan. It used to work fine now its on all the time.
I have checked the relay and it is getting a signal to turn on (small terminals getting 12v to turn on relay).
I don't have the a/c on.
I tested disconnecting the front thermostat completely and grounding it?

What else could be telling the fan to run all the time?

Last edited by 90 Turbo; 11-19-2015 at 12:10 PM.
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