2000 Jeep Laredo Engine fan not turning on

WELD797

MEMBER
2000 JEEP GRAND CHEROKEE LAREDO
6 CYL
4WD
AUTOMATIC
155,000 MILES

The electric fan on my radiator will not turn on when the engine heats up. The hoses feel like there is coolant running through them, the fluid in the radiator is full and clean and my reservoir is correctly filled. The fan spins by hand. I replaced the fan relay switch that usually seems to be the cause of this and it did not fix the problem.

There is a small black cylindrical object on the driver's side near the firewall that has vacuum hoses and electrical conduit and a plug running from it that begins ticking quickly when it seems that the fan should turn on. I don't know what this object is but it seems to be either the issue or the thing that can lead me to the issue.

Any thoughts? Thanks.

2 Replies

WELD797

MEMBER
2 POSTS

Also - the fuses are good.

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Thursday, March 4th, 2010 AT 6:31 PM

BEEF99

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152 POSTS

I need to have a little more information to be able to help you. Is your engine actually overheating, i.E, the temp guage climbs and does not go down while idling?

The fan itself could be bad, to test if the fan is bad, let it get up to operating temps and let it idle, then check conductivity going from the plug that is near or attached to the fan. If you have power going to the fan then the fan may be bad. Also, note that the fan will not operate all the time and is typically only used while at idle or for the A/C. If you have two fans and one is electrical while the other is mechanical, then the fan only operates usually when the A/C is in operation(note the electrical fan is usually placed where the condenser is in front of the radiator). I am not trying to overload you with info. But mearly trying to help you understand more.