Mechanics

COOLING FAN STILL WONT RUN

1991 Oldsmobile Ciera

Engine Cooling problem
1991 Oldsmobile Ciera 6 cyl Two Wheel Drive Automatic 95100 miles

The cooling fan wont kick on. I hooked motor to battery and the fan kicked on fine. I replaced the temperature sensor and the relays. And still the fan wont kick on. I do not know what else to try. Getting very nervous with these hot days approaching. Thanks for any help
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Deadhead11
July 4, 2010.




If you unplug the cts and turn key on, does the fan run? Are there any applicable trouble codes? If you turn on the ac, does the fan run. On some makes and models when you use jumper wire to access codes, the fan will run. Voltage to the load side of relay, is hot all the time. Voltage to the coil side of relay, goes hot when you turn on the key.

Next, I'd have to check circuits at the fan relay.


http://www.2carpros.com/forum/automotive_pictures/512072_33_fan_relay_1.jpg


Tiny
Internetmechanic
Jul 4, 2010.


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