Hoping someone has seen this one and can save me some grief chasing it down.

It's a '94 M6 with the later '94 year model cooling fan setup that uses 3 relays, etc.

After I've run the car long enough that the radiator fans come on for 5-10 minutes, I blow the 10 Amp fuse for the radiator fans. Just started doing it out of the blue. As long as I'm moving 40MPH or faster the car won't overheat, so it's not a generalized cooling issue. Just the cooling fan fuse.

Anybody seen this one before? Thanks for any tips or ideas.

 

You got a burned O2 wire rubbing the exhaust. Look on the passenger side.

That fuse powers the fan relays but not the fans. It also powers the O2's, the reverse lockout and skip shift solenoids, the evap purge solenoid and the EGR solenoid.

 

Thanks, man. I appreciate the help.

 

OK, it wasn't a burned O2 wire. And I thought this was going to be easy.

Any other ideas, seeing as how I hate to leave all that horsepower just sitting in my garage.

 

I looked at a wiring diagram for ya. You have a red wire that comes from the fuse to feed the 2 relays. You ethier have a short somewhere along the red wire or a relay is bad.
Try pulling 1 relay out at a time and wait for the fans to come on. Only 1 fan will come on because each fan has a relay.

Here's how, you pull 1 relay. Start the car and let it warm up, when the temp gets high enough the 1 fan should come on. If the fuse blows again, put back the relay you justed removed and remove the other relay and repeat test. If you don't blow a fuse this time you have found the bad relay that you just removed.

The contacts in the relay may be corroded, after 5-10 the electrical load becomes to great and blows the fuse.

 

If your air pump is shorted out internally it will blow the fan fuse, my pump is unplugged for that same reason.

 

96 like your's that's true. Doesn't work that way with a 94. Air pump has it's own fuse.

 

Thanks for the follow up, I didn't know that.

 

He has a 'late' 94, that has the 3 relay setup..