Replacing engine bay fan - 986 Forum - The Community for Porsche Boxster & Cayman Owners

mikesz · 09-20-2013, 09:33 AM

My engine bay coolant fan is not working. I replaced the relay and can hear it clicking when I hook up my Durametric but fan does not go on. The fuse is good so I am thinking the fan is shot. Is there a DIY to explain how to do this?

Trey T · 09-20-2013, 10:41 AM

I've never serviced it but it's a single speed and should only have two wires.

Get a digital multimeter (DMM) and determine ground and test it directly to battery. Sorry for not be detail but hopefully someone can chime in and describe more.

mikesz · 09-23-2013, 04:44 PM

I think I need to clarify. I have a durametric. when I hook it up and try to test the engine bay fan I can hear the relay clicking but the fan does not go on. I checked the fuse and its good but still fan doesn't go on. when I pull out the relay and use a jumper the fan goes on no problem and runs strong. So why would the fan work fine with the jumper and not using the durametric?

AKnowles · 09-23-2013, 05:41 PM

Based on your testing, I'd say you have a bad relay. After all, it works when you use a jumper. Just because a relay clicks does not mean the contacts are making contact or that the contacts are not burned/pitted and unable to handle the current flow.

Paul · 09-23-2013, 06:34 PM

+1 ^^^^^^^^

mikesz · 09-24-2013, 04:15 AM

ok I ordered a new relay.