Coolant fans not working and causing the engine to overheat

MAYSENZGRL

MEMBER
2002 OLDSMOBILE ALERO
3.4L
6 CYL
4WD
AUTOMATIC
150,000 MILES

I've been having problems with my car overheating because my coolant fans don't come on. The relays and fuses are fine fans work when wired to the battery. The nipple is broken off of the front port. Fans were already not working before nipple was broken off. The wires that are wired to the battery keep burning up. The plug to the fans is melted.

Saturday, May 15th, 2021 AT 10:46 AM

1 Reply

HARRY P

MECHANIC
2,295 POSTS

Hello. I suspect that one or both of those fan motors are pulling too much power for the circuit. When you wire direct to the battery, you're reducing the electrical resistance so it doesn't burn up those wires. Hook it up directly again and let it run a few minutes. If the wires are hot to the touch, then the fan motors need replacing. Might as well replace any burnt looking wires as well.

Also, pull out the under hood fuse box and look for signs of charring.

Let us know what you find.

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Sunday, May 16th, 2021 AT 7:19 PM