RAM 1500 Truck 4WD V8-5.7L VIN D (2005)
Measure the resistance between the (C72) Blower Motor M1 Driver circuit and the (C70) Blower Motor High Driver circuit in the A/C Heater
Control C2 harness connector.
Q: Is the resistance below 10K ohms?
YES: Repair the (C72) Blower Motor M1 Driver circuit for a short to the (C70) Blower Motor High Driver circuit. Perform BODY
VERIFICATION TEST - VER 1. See: Testing and Inspection/Diagnostic Trouble Code Tests and Associated Procedures/Verification Tests/Body
Verification Test
NO: Replace the A/C Heater Control. Perform BODY VERIFICATION TEST - VER 1. See: Testing and Inspection/Diagnostic Trouble Code
Tests and Associated Procedures/Verification Tests/Body Verification Test
8. CHECK THE (C71) BLOWER MOTOR LOW DRIVER CIRCUIT FOR AN OPEN
Turn the ignition off.
Disconnect the Blower Motor Resistor Block harness connector.
Measure the resistance of the (C71) Blower Motor Low Driver circuit between the Blower Motor Resistor Block harness connector and the A/C
Heater Control C2 harness connector.
Q: Is the resistance below 5.0 ohms?
YES: Go To 9
NO: Repair the (C71) Blower Motor Low Driver circuit for an open. Perform BODY VERIFICATION TEST - VER 1. See: Testing and
Inspection/Diagnostic Trouble Code Tests and Associated Procedures/Verification Tests/Body Verification Test
9. CHECK THE (C73) BLOWER MOTOR M2 DRIVER CIRCUIT FOR AN OPEN
