Question about 1998 Oldsmobile Silhouette
Cooling fans don't engage when a/c is turned on or when temp reaches 200 degrees plus. I jumped fans from battery, and they work. Check all fan relays, and their all good. Both 30 amp fuses are good. So i can only think there is a thermostat on the radiator or on one of the fans that has gone bad. where can i find them or a diagram that shows them and location. Iam just assuming at this point but there has to be a thermostat somewhere to turn the fans on and off. please help thanks! Oh and i also replaced a sensor on the thermostat housing, and it didnt help! Sigh's
Your Problem Can VERY WELL BE with the Temp Sensor, As It Is the First in This Electrucal Circut . it Waits for 210-230 Degree Engine temp and Gives that Sygnal to the ECM then ECM Grounds out the Cooling FAN RELAY To Turn ON the FANS and the Temp Sensor is Usualy THE #1 Culpret Closley in front of the RELAY.
There are 2 Sensors On this Vehicle The One You Replaced and One Located At Trans Side of
Engine Closer to Front of Vehicle At the Head ,Thereis a 2 wire Plug On it and This Sensor Goes to the ECT witch CONTROLS COOLING FAN RELAY. Hope this Helps and if you Need A Diagram For this It Must be Emailed as FixYa Does NOT Support Large Picture Files. My Email Add. Is MY
Screen Name Here on FixYa @aol.com
Posted on Jun 15, 2009
Coolant fan relays or coolant temperature sensor.control fan coming on.check the coolant level if low it will cause cooling fan problems.if everything check out ok.you have pcm problems.
Posted on Jun 15, 2009
Coolant temp sensor issue. Run car and unplug sensor....if they activate replace sensor.
Posted on Nov 10, 2018
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