I am Trouble shooting my rear wiper motor on my 2005 Dodge Grand Caravan. It has intermittant wiper mode, but only one switch. It quit working. At first, it would work only part of the way across the window and then stop. After a minute or so, it would move farther across the window and then stop again. You could get it to move all the way across by puttinbg it in wash mode(holding down button). It would not stop in the correct position though. Now it does nothing. If you hold down the button for wash, fluid comes out but wiper arm does not move. Using a digital multimeter at the plug, I get 12 volts from the wire coming from the wiper control switch and no volts coming from the wire that comes from the BCM. The Haynes repair manual does not give voltages or anything in their diagram. Should I have power at both wires? Is this a bad wiper motor or a bad BCM? The fuses to the rear wiper are good.
Most likely the wiper motor is bad the second wire sould be a ground if you set meter to ohms you sould be able to get a low resistance to any good ground on the vehicle if the hot wire is hot any time key is on the bcm is controling the ground to operate moter and you should have a steady continuity on the ground side with switch on the fast postion an it will read on and off in the intermitant postion if both wires test good motor is bad when you replace motor let it cycle and shut it off before installing the arm on it
Had the same issue a few years ago with my 2005 Grand Caravan: had extended warranty and so the dealer replace the motor and corrected the problem. Now I am out of warranty and have the same issue. Like some other parts on my van (like tie ends that I replaced again after they were warranty replaced) are after market parts better than original Chrysler parts?
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Westy,
Did you ever figure out your rear wiper. I have the same van with the same exact problem and am very interested in how you solved this.
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