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E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999


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Old Wed, Jun-08-2011, 04:27:08 PM   #51
Eryan36
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Default Re: Auxiliary Fan Question

My fan works fine, the relays are good, but it's not making good connection at the plug. I ordered a new plug and bits, here's the part numbers:

Plug (x1): 61 31 1 378 410
Contacts (x3): 61 13 1 376 224

If your fan isn't coming on after you've replaced the relays, and it comes on when you test it on an external 12v source, try replacing the plug.
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Old Wed, Jun-08-2011, 04:46:26 PM   #52
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Default Re: Auxiliary Fan Question

Quote:
Originally Posted by Eryan36 View Post
My fan works fine, the relays are good, but it's not making good connection at the plug. I ordered a new plug and bits, here's the part numbers:

Plug (x1): 61 31 1 378 410
Contacts (x3): 61 13 1 376 224

If your fan isn't coming on after you've replaced the relays, and it comes on when you test it on an external 12v source, try replacing the plug.
That requires cutting off the old connector and recrimping right?

I had a similar issue with a fog light. I just used a bit of sandpaper and made a cylinder out of it, and cleaned out the pins and receptacles. (also had to use a toothpick to splint the wire but hopefully most people don't have to go to that extreme )
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Old Thu, Jun-09-2011, 02:55:35 PM   #53
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Default Re: Auxiliary Fan Question

Great thread. Looks like my aux fan isn't working either. I shorted the two pins on the coolant temp switch and could hear the relays making noise but no fan. Are the relays a dealer-only item?

Thanks,

Dave
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Old Thu, Jun-09-2011, 09:10:25 PM   #54
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Default Re: Auxiliary Fan Question

Quote:
Originally Posted by m3smurf View Post
That requires cutting off the old connector and recrimping right?

I had a similar issue with a fog light. I just used a bit of sandpaper and made a cylinder out of it, and cleaned out the pins and receptacles. (also had to use a toothpick to splint the wire but hopefully most people don't have to go to that extreme )
Yes, you cut and re-crimp.

Quote:
Originally Posted by dkegel View Post
Great thread. Looks like my aux fan isn't working either. I shorted the two pins on the coolant temp switch and could hear the relays making noise but no fan. Are the relays a dealer-only item?

Thanks,

Dave
Check the fan with an external 12v source to see if it comes on with power at all.
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Old Fri, Jun-10-2011, 01:22:52 AM   #55
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Default Re: Auxiliary Fan Question

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Originally Posted by Eryan36 View Post
Check the fan with an external 12v source to see if it comes on with power at all.
What I did was measure the voltage at the fan connector while jumping the coolant temp switch connector. Depending on which relay I triggered, I had would get 12 volts at the fan connector. I ordered a new fan from Pelican.

Dave
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Old Fri, Jun-10-2011, 01:32:54 AM   #56
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Default Re: Auxiliary Fan Question

Quote:
Originally Posted by dkegel View Post
What I did was measure the voltage at the fan connector while jumping the coolant temp switch connector. Depending on which relay I triggered, I had would get 12 volts at the fan connector. I ordered a new fan from Pelican.

Dave
+1

If you are getting power at the fan plug but no fan when jumping the switch plug then the fan is toast. Just happened to me a few weeks ago.
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Old Sun, Jul-31-2011, 09:53:35 PM   #57
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Default

Quote:
Originally Posted by m3smurf View Post
That requires cutting off the old connector and recrimping right?

I had a similar issue with a fog light. I just used a bit of sandpaper and made a cylinder out of it, and cleaned out the pins and receptacles. (also had to use a toothpick to splint the wire but hopefully most people don't have to go to that extreme )
FYI- I got that plug and the new contacts, but it was the wrong plug, so I'm not sure the of PN for it. The contacts were right. I ended up reusing my old plug and fixing the old contacts. RTV'd the ground back in and haven't had any problems since.
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Old Fri, Aug-26-2011, 12:25:53 AM   #58
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Default Re: Auxiliary Fan Question

So my fan does not work on high or low speed when jumpering the temp switch plug. I can hear the relays click.

I took 12 volt lead using a cigarette lighter plug and applied the voltage to the blue and black/blue connector on the fan and it started spinning but it was blowing air away from the car.

So I am guessing the correct high and low speeds would be 12v to the brown and blue and then brown and black/blue on the fan connector?
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Discussing Auxiliary Fan Question in the E36 M3 (1992-1999) Forum - {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)