Diagnostic Test

WARNING: This page is about a different car, the 2015 RAM 3500 HD and 2015 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

WAIT-TO-START LAMP DOES NOT COME ON
1. Turn the ignition off.
2. While watching the Wait-To-Start lamp, turn the ignition key on.
  Did the Wait-To-Start lamp light?
  
  Yes
  - Go To 2
  No
  - Go To 3
WAIT-TO-START LAMP STAYS ON ALL THE TIME
1. Turn the ignition off.
2. While watching the Wait-To-Start lamp, turn the ignition key on.
  Does the Wait-To-Start lamp stay on all the time?
  
  Yes
  - Go To 3
  No
  - Wait-To-Start Lamp operating normally. Test passed.
  - Perform the PCM VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE FUSED IGNITION SWITCH OUTPUT CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Turn the ignition off.
2. Remove the cluster.
  NOTE:
  Check connectors - Clean/repair as necessary.
3. Turn the ignition on.
4. Using a 12-Volt test light, check the Fused Ignition Switch Run/Start circuit while the ignition is in the run/start position.
  Is the light illuminated and bright?
  
  Yes
  - Go To 4
  No
  - Repair the Fused Ignition Switch Output circuit for an open or high resistance.
  - Perform the PCM VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE WAIT-TO-START LIGHT BULB
1. Remove and inspect the Wait-to-Start Bulb.
  Is the Bulb OK?
  
  Yes
  - Test complete.
  No
  - Replace the Wait-to-Start Bulb in accordance with the service information.
  - Perform the PCM VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .