Quote:
Originally Posted by carl177
Thanks 97 SL320
Yes they are pulling air towards the engine compartment. is the second speed on those auxiliary fans suppose to come in at any time in this model?
If one pulls the sensor by the top radiator hose, they kick on to second speed, but do they ever do it on their own?
|
The high speed function of the fan is engine tempreature based, they will kick on when the cylinder head temperature gets close to 105C. (you tested that by removing the plug on it and they worked) - the relay is controlled by the pushbutton HVAC unit in the dashboard.
In original form the front condenser fans push air into the condenser and the engine fan should start to heat up and start working. But as the fan is rpm dependant you may lose some performance at idle.
Can you check that the resistor for the slow speed function is not charred/burnt - a charred resistor does slow them down further and eventually cuts the circuit open. In simple words you should not be able to slow down the fans with your hands, they should be having considerable torque even at lower speed (be careful with this test)