Diagnostic Test

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
NOTE:
This DTC must be active for the results of this test to be valid.
1. Turn the ignition on.
2. With the scan tool, read and record ABS DTCs on the repair order.
3. With the scan tool, erase ABS DTCs.
4. Cycle the ignition from off to on.
5. With the scan tool, read and record the DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the ABS-INTERMITTENT CONDITION TEST. Refer to STANDARD PROCEDURE .
CHECK THE FUSE
1. Turn the ignition on.
2. Using a 12-volt test light connected to ground, check the Fuse F76 (10A) for power.
  Is the fuse good?
  
  Yes
  - Go To 3
  No
  - If the related fuse is open, check the (F941) Fused Ignition Switch Output (RUN/START) circuit for a short to ground.
  - Perform the ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
(F941) FUSED IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the ABS Module harness connector.
3. Measure the voltage on the (F941) Fused Ignition Switch Output (RUN/START) circuit at the ABS Module harness connector
  Is there any voltage present?
  
  Yes
  - Repair the (F941) Fused Ignition Switch Output (RUN/START) circuit for a short to voltage.
  - Perform the ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 4
POWER CIRCUITS FOR AN OPEN OR HIGH RESISTANCE
1. Turn the ignition on.
  NOTE:
  The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
2. With a test light connected to ground check (A107) Fused B+, (A200) Fused B+ and (F941) Fused Ignition Switch Output (RUN/START) circuits at the ABS harness connector.
  Does the test light illuminate brightly?
  
  Yes
  - Replace the Anti-lock System Brake (ABS) Module in accordance with the service information. Refer to MODULE, ANTI-LOCK BRAKE SYSTEM (ABS), REMOVAL .
  - Perform the ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Repair the Power circuits for an open or high resistance.
  - Perform the ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .