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- December 21, 2007
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- South Jersey
- Year, Model & Trim Level
- 99 Mountaineer V6 4x4
I think he is right. Just like the blower motor resistor in a manual system uses resistance to vary the motor speed, the EATC uses a solid state PWM controller to vary the voltage to the blower motor to control the motor speed. So his readings sound right. Ranger Rick, when you check the voltage at the motor connector are you using the ground on that connector or somewhere else? You should use the the ground in the motor connector to eliminate any possibility of it being a ground problem in that circuit. Follow me? But I think you are on the right track.