RAM 2500 Truck 4WD V8-5.7L VIN D (2005)
Turn the ignition off.
Disconnect the A/C Heater Control C2 harness connector.
Turn the ignition on.
NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
Using a 12-volt test light connected to ground, back probe the (C71) Blower Motor Low Driver circuit, the (C73) Blower Motor M2 Driver
circuit, 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: Does the test light illuminate brightly on each circuit?
YES: Go To 4
NO: Go To 8
4. CHECK THE (C71) BLOWER MOTOR LOW DRIVER CIRCUIT, THE (C73) BLOWER MOTOR M2 DRIVER CIRCUIT, THE
(C72) BLOWER MOTOR M1 DRIVER CIRCUIT, & THE (C70) BLOWER MOTOR HIGH DRIVER CIRCUIT FOR A SHORT TO
VOLTAGE
Turn the ignition off.
Disconnect the Blower Motor Resistor Block harness connector.
Measure the voltage of the (C71) Blower Motor Low Driver circuit, the (C73) Blower Motor M2 Driver circuit, 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 there voltage present on any of the circuits?
YES: Repair all circuits with voltage present for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. See: Powertrain
Management/Computers and Control Systems/Testing and Inspection/Diagnostic Trouble Code Tests and Associated Procedures/Verification
Tests/Body Verification Test
