Having a fan issue on my 2012 maxxforce 13, fan runs constantly on one speed. I'm going through the diag procedure and my truck has the epa 07 plug so no fan test is available. Has anyone dealt with this issue before?
Update I applied 12 volts to pin 3 and ground to pin 1. Fan does not turn off. Resistance between pin 1 and 3 is 9.6 ohms which is within spec.
That leads me to believe the fan clutch is bad. Any insight?