Q A How To Turn On Cooling Fans In A 1999 Oldsmobile Justanswer Its job is to send a signal to the ecm powertrain module. the ecm then controls the fan circuit as needed. without a scanner, testing the etc sensor is a little hard. with scanner, you can get a "real time" reading of the temperature the sensor is sending to ecm. since your fans are working with ac on, it is most likely the rest of the circuit. Disconnect the powertrain control module. turn the ignition on. check for battery voltage on the dark blue wire on the blue pcm connector, pin 5. there should be 12 volts from the windings side of cooling fan relays 2 and 3 on this wire. if no voltage, check the cool fan 2 maxi fuse in the under hood electrical center.
Q A How To Turn On Cooling Fans In A 1999 Oldsmobile Justanswer Oldsmobile mechanic: ron z. if the fans come on when the a c is on, then the relays should be ok. bleeding the system is always a good idea. if there is air in there, the temp sensor will not function correctly. on vehicles equipped with the 3.41l engine, open the coolant air bleed valve. the coolant air bleed valve is located on the top of the. 1999 oldsmobile. engine cooling problem. 1999 other oldsmobile models 6 cyl front wheel drive 106000 miles. hello, the cooling fans on my olds intrigue are not coming on. so far i put 12 vdc to them, motors are working fine. i checked the 40 amp fuse. ok. tested the 2 relays. getting continuity through both of them. 1999 oldsmobile silhouette. the most common reasons a 1999 oldsmobile silhouette radiator fan isn't working are the fan assembly, the fan clutch, or the coolant temperature sensor. 0 %. 34 % of the time it's the. fan motor or clutch. 0 %. 28 % of the time it's the. fan relay or fuse. The most common reasons an oldsmobile 88 radiator fan isn't working are the fan assembly, the fan clutch, or the coolant temperature sensor. 0 %. 34 % of the time it's the. fan motor or clutch. 0 %. 28 % of the time it's the. fan relay or fuse.
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