stoopideric Posted October 22, 2014 Report Share Posted October 22, 2014 I am going to go through my fan wiring system tomorrow to hunt down why they won't come on. Can anyone tell me what the part #'s are for the primary and secondary switches are? I have searched but had no luck Link to comment Share on other sites More sharing options...
markhansenconquest Posted October 22, 2014 Report Share Posted October 22, 2014 as per 87 - 89 cd # 8 passenger side is mb007639 and 9# is drivers side......mb 435741......sencers...... . Link to comment Share on other sites More sharing options...
DSMracespeed Posted October 23, 2014 Report Share Posted October 23, 2014 Put the key in the on position and then disconnect the wires for each fan from the thermal switches at the bottom of the radiator.Connect a wire to the disconnected wire and then touch it to a good ground and the fan should come on(do for each fan).If they come on,your thermal switches are most likely bad or you have bad grounding to your radiator.If they don't come on,you need to make sure there is power going to the fans or the fans are bad. Jerry L. Link to comment Share on other sites More sharing options...
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