We already changed the thermostat and the sensor
2007-01-05 12:14:43 · 7 answers · asked by Anonymous in Cars & Transportation ➔ Car Makes ➔ Chevrolet
Check for any blown fuses. also check leads to the fan. Take an ohm meter and test the fan. It is possible the fan is bad.
2007-01-05 14:22:42 · answer #1 · answered by logan 5 · 2⤊ 0⤋
You need a proper diagnosis. Access to a scanner like a Tech2 would really help here as it posseses an override function to turn the fans on when you demand it. If you don't have access to a Tech2, first check all fuses and fusible links that supply power to the fan(s). If satisfied this is okay, locate the coolant fan relay and remove. Test all inputs, There should be two power supplies to the relay when the ignition is turned on. One should be a thick wire and the other should be pretty skinny. The thick one is used as the power supply to the fan and is usually attached to battery power through a fusible link. Relay operation is done by the PCM grounding the skinny wire on the other side of the relay which enables the fan. If you have both powers, use a jumper wire from big supply power wire to the big output wire that goes to the fan. Be careful as these fans draw a lot of power. If the fan does not come on, you either have a broken wire to the coolant fan motor or the motor is no good. I suggest replacing the relay as well if the motor has been determined to be bad as the motors usually burn out which overheats the circuit which burns the contacts in the relay. If all that stuff works, the problem lies in the PCM side of the circuit. This could be as simple as the grounding wire from the relay to the PCM is broken or there is a data problem for coolant temp. This would require the scanner to determine what kind of data you are getting. Good luck.
2007-01-06 05:25:57 · answer #2 · answered by Deano 7 · 0⤊ 0⤋
There also is a relay that is in the circut. But additionally the fan motor itself could be failing. A self check on that is to direct wire test from the battery to see if it runs.
2007-01-05 12:31:55 · answer #3 · answered by Anonymous · 0⤊ 0⤋
circumvent guy is actual, 2 relays. 4 spades on each and each relay. they're placed on a rail at the back of the excellent headlamp assembly. they must be the 2d and 4th relays on the rail, yet no longer unavoidably. the different 2 relays are the A/C compressor and gas pump.
2016-12-12 04:52:01 · answer #4 · answered by ? 4 · 0⤊ 0⤋
replace the fan. why would u replace the thermostat? thats like changing your spark plugs because your brakes went out.
2007-01-06 04:01:40 · answer #5 · answered by Urban Informer 3 · 0⤊ 0⤋
if possible unplug fan and check with ohm meter have you checked fuse ?
2007-01-05 12:25:16 · answer #6 · answered by neautronbill 1 · 0⤊ 0⤋
you should check all the connections and check your fuses
2007-01-05 15:02:54 · answer #7 · answered by Anonymous · 0⤊ 0⤋