Skip the auto shop - Our mechanics make house calls

Q: Electric radator fan won't kick on at all

asked by on

I did a motor replacement I have the entire working harness plugged in but my electric radiator fan won't kick on and my truck runs hot it will not even kick on when I turn the AC on high what could the problem be?

My car has 142000 miles.
My car has an automatic transmission.

Hello. The radiator fan should work in low or high speeds. The speeds are controlled by two relays in the totally integrated power module on left front fender. There should be a 60 amp fuse in position J13 to power the relays. The relays are turned on and off by the totally integrated power module. This module is told by the electronic control module to turn turn on and off the fans through the computer network. The most common problem is the totally integrated power module not working correctly. The system will need tested and scanned to activate the fans through the computer to see if this is a sensor issue or totally integrated power module issue. Have a mechanic use a diagnostic scan tool to attempt to activate and test the fan for you. A certified mobile mechanic from YourMechanic can come to your home or workplace to test why the fan isn’t working.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: 05 ram 4x4 Vibration in the floor during acceleration, and a vibration in​ steering at cruising speed that goes away when letting off the gas.

Hi there. This sounds like the tires on the front are out of balance and the ball joints are worn and need replaced. A out of balance wheel will cause the vehicle to vibrate and may change location to the...

Q: Overnight change in operation. 2009 Honda Element EX AWD ran perfect last night. This morning it started rough and ran rough.

Hi there. An ignition coil would definitely be a very good guess. However, that is exactly what it would be: a guess. When a misfire code is stored, the ECM reads a slow down on that particular cylinder. Why this...

Q: I changed the break light switch and now I can not get the truck out of park

Hello, thank you for writing in. The vehicle may be having issues the with ABS system. Considering the timing with the brake light switch, you will want to verify that installation and make sure it is clean, dry, and tight....

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...