Medium and Heavy Trucks
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hi I'm alex could I get the last 8 of your vin?
OK thank you
Looks like this is a Horton drive master 2spd
I have terrible reception where I am at as well, I can call whenever it is convenient
Do you have any software to read ECM or body controller?
Coolant temp sensor? where are you getting thermal switch from?
Fan is controlled by both the ECM and body controller for a/c
It doesn't have high coolant temp I assume
Ok seems to me the body controller is probably requesting fan on for high a/c pressure
Does not mean it actually has high a/c pressure but body controller might think it does
Yeah it is possible body controllers sometimes have a mind of there own
Yeah if you have power at the solenoid something is requesting fan on. Do you have a fan status parameter on your jpro
Yeah like in servicemax we have a fan status parameter and it will say like "a/c" when fan is on because of a/c high pressure
Well its not showing high coolant temp and that's what the ECM looks at for fan control
You have 12 v at the solenoid all the time right
We can keep it open if you need more help
Was the solenoid replaced?a normally closed solenoid in place of a normally open one?
If you have it hooked up to DLB software it will tell if BCM is requesting fan on
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