Question about 1992 Oldsmobile Cutlass Ciera

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1992 olds cutlass coolant fan won't turn on. The fan works when wired remotely. Could it be the sensor or the relay. If the relay which one of the four relays is it? Could I switch one of the other realys to test it?

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To make sure it is not the relay you can short out the wires on the sensor mounted under the throttle body near the thermostat housing(2 wires - yellow and black). With the ignition on the fan should start up. If not check the fuse and relay. I cannot remember the relay position either but check the guage(thickness) and color of the wire on the fan. You will find the same 2 on the relay along with 2 others.

Posted on Aug 21, 2010

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