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2002 Grand Ckherokee laredo, 65,00 miles on it. The fan runs even when the engine is turned off. The guy said its the cooling fan relay switch. He's tried one relay switch,that may have been a bad relay switch. The fan being on all the time drained the battery. Help!! The overdrive light off light has come on and stayed on. Help1
Relay is in the power distribution center near the battery. does the fan go off when you remove the relay? Relay is turned on by the computer after it receives info from the temp sensor. Why didn't the "guy" order a new relay? Was he a tech in a shop?
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depending on the engine temperature the fan is supposed to remain on after you turn the engine off, until the engine reaches a preset cooler temperature. when it reaches cooler temperature usually within 5 minutes or so it should cut off... if you cut it off and it is running 30 minutes later.. then there is a problem with the fan relay or temperature sending unit.
fan relay is under the pass side headlight, remove headlight and cut a hole in the plastic piece that was under the headlight. the relay is small and black with a blue sticker on it
remove pass side headlight and cut a square hole
in the black flat plastic that was under the headlight, the relay is a small silver part w/ a blue sticker on it
You can test the system by disconnecting the engine temp sensor that turns on the fan, the engine computer will go into failure mode and turn on the cooling fan, if the fan does not run check for voltage at the fan with a 12 volt test lite..
the only problem that vehicle has is with cooling fans is relay/module or electrical harness to module that burns up located behind and under right front headlamp assy must remove headlamp to access relay/module that is what powers up fan motor module assy.
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