[trailblazer]

Does any no where this sEnsor is located? Fan is intermittent from the min u turn the key on. All connections look good at radiator. I'm sure I got something jacked up at sensor. Need help locating

 

[milosusa]

On the engine is only one temperature sensor, one next to thermostat housing
I think this sensor send temperature reading to ECU which control the fan on/off operation. IMHO
milos

 

[allcool]

Temp sensor is on the head.

As a fail safe, if the plug gets disconnected the fan will run continuously.

If the the plug comes loose intermitantly making/breaking connection the fan operation will be erratic/intermittent also.

 

[trailblazer]

Allcool, that is exactly what I'm experiencing. Thank u both. Ill check it out tonight

 

[trailblazer]

wanted to let you guys know, i found the issue, wire loom chaffed and grounding out on the frame.
thanks for the help. the info was spot on.

 

[Kr211v]

My fan won't come on unless I hard wire it