Question about 1999 Chevrolet Silverado 1500
Switches are good, changed circuit breakers although 1 is hot to the touch, fuses are good. Both windows do not operate after changing the heater core.
Look for pinched wires behind the heater box that go from door to door
Posted on Jun 30, 2009
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Posted on Jan 02, 2017
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Passenger Door Switch (PDS)
Body Control Module (BCM)
Rear door power window switches
Power window motors in each of the doors
PWR WDO Circuit Breaker
Power Window System Controls
The power window system will operate anytime the Retained Accessory Power (RAP) system is active or when the ignition switch is in the ACCY or ON position.
The driver master control switches are integrated into the DDS. When a power window switch is activated in the up or down positions the DDS supplies power and ground to the window motor control circuits to drive the window motor in the required direction. Prior to activating a power window motor the DDS will supply the control circuit with a low current bias voltage in order to determine that a short to ground condition does not exist and during window motor operation the DDS continues to monitor the motor current to verify proper window motor operation.
The DDS controls the passenger window by a serial message to the PDS. When a power window switch is activated in the up or down positions the PDS supplies power and ground to the window motor control circuits to drive the window motor in the required direction. Prior to activating a power window motor the PDS will supply the control circuit with a low current bias voltage in order to determine that a short to ground condition does not exist, and during window motor operation the PDS continues to monitor the motor current to verify proper window motor operation. (Scan tool support is available for this system
Check this circuit breaker
RETAINED ACCSRY PRW BRKR 30 amp. located in the left instrument panel fuse box . if the breaker is good check power B+ at the drivers door switch . connector 1 terminal b yellow wire . Sometimes the wires inside the rubber boot coming from body to door break .
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