Question about 2002 Oldsmobile Intrigue
Mechanic has traced all the wires for electrical short. none found. had to replace master computer. no help. when car is turned off or turned on fans run all the time. if ignition switch is in on mode(so radio can play but engine not on, fans do not run).problem does not appear to be in fans or in temperture switch that controls fans switching on or off.
The master computer controls one or more relays which control the fans. Usually the fans will come on sequentially as the engine temperature rises, first one fan, then both...and this is accomplished by up to three relays.
Usually, this problem is the result of a faulty temperature sender, or computer, but you do not state if the sensor was tested or replaced.
If you are SURE the temperature sensor (it's not a switch) is good, and the computer is good, you probably have a faulty relay.
Check your manual for the location of these relays and tap on them vigorously with a screwdriver handle...you may get lucky and find the offender. Otherwise, get another relay and replace them one at a time till you find the bad one.
If none of this works, you will need a REAL automotive electrician to diagnose the problem. Incidentally, I would not pay for new master computer if it didn't fix the problem !
Posted on Sep 01, 2009
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Posted on Jan 02, 2017
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