Chevy Cooling Fan Relay Location Q A Guide Justanswer I have had a lot of people ask me about gm radiator cooling fan diagnosis in the past. it basically runs two fans in series for low speed and then put's eac. Testing low and high speed cooling fan relays. subscribe: carsntoys tools and supplies: amazon shop carsntoys mult.
How To Test Cooling Fan Relays Low And High Speed Youtube Key points. recognize symptoms: engine overheating, poor a c, continuous fan operation, battery drain, risk of a c compressor damage. inspect for damage: check for corrosion, burnt marks, loose pins, cracked sockets in the relay. test functionality: use a multimeter, check for continuity resistance, listen for a click, inspect physically. 6) checked for radiator blockages by pouring water down rad with different ends undone each time no blockages. 7) hot air blows hot. 8) a c blows cold. **** 9) a c fan will not turn on if a c is turned on (passenger side fan) **** 10) driver side fan will not kick in until the car hits the red zone on the temp gauge. Another common symptom is when, the fans don’t come on at all. so, if the cooling fan relay fails, it will be unable to supply power to the fans. as a result, the fans will not operate. cooling fans, that will not turn off. this is another (less common) symptom of a bad or failing cooling fan relay, but it does happen. 3. after the vehicle is shut off if the engine coolant temperature at key off is greater than 101°c (214°f) the low speed fans will run for a minimum of 60 seconds after 60 seconds, if the coolant temperature drops below 101°c (214°f) the fans will shut off. the fans will automatically shut off after 3 min. regardless of coolant temperature.
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