can ya show me how to test a wiring connector?

[sunliner]

I'm trying to Dx a P0526 error...pretty sure the relay is ok, now moving on to the wiring harness. this is where I'm inexperienced....I have a meter, but the only thing I really know how to do with it is check a battery for voltage...so can someone walk me through setting the meter and where to probe?

 

[mrrsm]

Sure... That Code defaults to an A/C Evap Temp Sensor. This is a Generic R&R Video for the AC Evap Temperature Sensor ...AND... it shows How To Test that Unit:

 

[sunliner]

my mistype...0526 for fan clutch. I do thank ya

 

[mrrsm]

Ooops... Right Church (Wrong Pew)

Our Hispanic Friend Here does a Great Job at explaining THIS EVFC Wiring Harness Diagnostic and Ground Wire Solder Repair at the EVFC Connector ...while using an External Bulb in the PCM PWM (Pulse Width Modulation) Circuit:

 

[Mooseman]

That's easy. Most likely suspect is the clutch wiring getting chafed or broken.

P1481 error code clutch fan speed sensor fault

Hi all GMTNation. .I have a 03 gmc envoy 4.2 and I am getting a P1481 error code which is to due with the clutch fan speed sensor circuit malfunction. I had replaced my clutch fan a few years ago and everything was fine until recently I got this P1481 code but my clutch fan is still operating...

gmtnation.com

If it's OK, the next likely suspect is a defective fan clutch.