RAM 2500 Truck 4WD V8-5.7L VIN D (2005)
1. (F21) FUSED IGNITION RUN/START CIRCUIT OPEN
NOTE: Diagnose and repair any MIC, FCM, PCM, or Communication DTCs before proceeding.
Turn the ignition off.
Disconnect the Electronic Overhead Module harness connector.
Turn the ignition on.
Measure the voltage between the (F21) Fused Ignition Switch Output (Run/Start) circuit and ground.
Q: Is the voltage below 0.5 volts?
YES: Repair the (F21) Fused Ignition Switch Output (Run/Start) circuit for an open. 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
NO: Go To 2
2. (Z13) ELECTRONIC OVERHEAD MODULE GROUND CIRCUIT OPEN
Turn the ignition off.
Measure the resistance between ground and the (Z13) Electronic Overhead Module Ground circuit.
Q: Is the resistance above 5.0 ohms?
YES: Repair the (Z13) Electronic Overhead Module Ground circuit for an open. 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
NO: Replace the Electronic Overhead Module. 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
Compass Test Failure
