The X5 forum's technical limitations are capped at checking the engine oil level, so I'll try this here...
2002 X5 4.4, 145k miles.
The aux fan stopped working (I found out when I noticed poor A/C while idling).
Checked for 12v at the fan connector, from the car side of the plug, no voltage. Checked fuse 61 (aux fan fuse), it was blown. Replaced fuse 61, reconnected fan, and the fan motor immediately started spewing out so much smoke that I actually grabbed the extinguisher because I thought it was on fire. The fuse didn't blow so I yanked it back out right away.
The fan wasn't seized before or after this incident, the blades spin pretty freely. Is this really a normal mode of failure for the fan, and I just need a replacement, or is there something else going on?
I know the fan is fed constant +12v and ground, and are actually controlled by a 5v PCM signal (It's a 3 wire connector), so I'm not sure if there's a way to test this for proper functionality? I can't imagine what mode of failure of that signal wire would cause the fan to basically blow up though...
It's not an e30 where you can just get a fan for $20, these are $500+ fans, and you have to remove the the entire front end of the truck to get to it, so I want to make sure before I just replace it and blow up another one due to faulty wiring or something.
2002 X5 4.4, 145k miles.
The aux fan stopped working (I found out when I noticed poor A/C while idling).
Checked for 12v at the fan connector, from the car side of the plug, no voltage. Checked fuse 61 (aux fan fuse), it was blown. Replaced fuse 61, reconnected fan, and the fan motor immediately started spewing out so much smoke that I actually grabbed the extinguisher because I thought it was on fire. The fuse didn't blow so I yanked it back out right away.
The fan wasn't seized before or after this incident, the blades spin pretty freely. Is this really a normal mode of failure for the fan, and I just need a replacement, or is there something else going on?
I know the fan is fed constant +12v and ground, and are actually controlled by a 5v PCM signal (It's a 3 wire connector), so I'm not sure if there's a way to test this for proper functionality? I can't imagine what mode of failure of that signal wire would cause the fan to basically blow up though...
It's not an e30 where you can just get a fan for $20, these are $500+ fans, and you have to remove the the entire front end of the truck to get to it, so I want to make sure before I just replace it and blow up another one due to faulty wiring or something.
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