2004 Chevy Trailblazer Cooling Fan Speed Sensor Circuit

Where is the cooling fan speed sensor located on 2004 chevy trailblazer some where iin your cylinder head go to your local autozone or orilleys and ask them for a print out.

2004 chevy trailblazer cooling fan speed sensor circuit.

Check that wiring has continuity the wire to sensor must have 5v. 2004 05 buick rainiers and gmc envoy xuvs 2005 gmc envoy denalis envoy xl denalis the p0526 cooling fan speed sensor circuit problem appears because of damaged wires in the cooling fan harness. The damage occurs because the harness pulls out of its plastic protective sleeve exposing the insulation to the sharp edges of the sleeve. Here an interesting website on trailblazer fan system.

If the code returns they have successfully diagnosed a larger issue with the fan speed sensor circuit and should move on to other repairs. I have a 2004 gmc envoy po526 fan speed sensor circut is in. Common mistakes when diagnosing the p0526 code in some cases a reoccurring p0526 code is due to a mechanic replacing the cooling fan motors without performing a more thorough diagnosis. And also 4wd service light is on and when i move the selector switch to 4wd hi awd or 4wlo the lights are all out.