My auxilary fan isn't working so first thing i checked was the fuse. Fuse is ok . Next I removed the relay cover but I can't tell which realy controls the auxillary fan. There are 5 in a row then one by itself.

First thing to do is to take out your relays one by one and shake them to your ear if you hear a rattle it means the piont on the relay has probably broken off and that relay needs replacing. You could also run power directly to your fan to make sure its working.
And try swapping the relays around to see if that kicks it in.
Remember it only kicks in when it reaches a certain temp.
Mark

Why not jumpthe high pressure switch with the key on? Doesnt work , leave it jumped then go to resistor and ck for voltage on both sides, non there go to relay.

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Mercedes Technician 7 Years (retired to Hyundai)
2000 Dodge Durango
98 Mazda truck