Trooper LTD 4WD V6-3.5L (2002)
Malfunction Indicator Lamp: Testing and Inspection
Reduced Power Lamp (RPL)
No Reduced Power Lamp (RPL)
No Reduced Power Lamp (RPL)
No Reduced Power Lamp (RPL)
Circuit Description
The Reduced Power lamp (RPL) should always be illuminated and steady with the ignition "ON" and the engine stopped. Ignition feed voltage is
supplied to the RPL bulb through the meter fuse. The powertrain control module (PCM) turns the RPL "ON" by grounding the RPL driver circuit.
Diagnostic Aids
An intermittent RPL may be cased by a poor connection, rubbed - through wire insulation, or a wire broken inside the insulation. Check for the following
items:
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Inspect the PCM harness and connections for improper mating, broken locks, improperly formed or damaged terminals, poor terminal-to-wire
connection, and damaged harness.
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If the engine runs OK, check for a faulty light bulb, an open in the MIL driver circuit, or an open in the instrument cluster ignition feed.
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If the engine cranks but will not run, check for an open PCM ignition or battery feed, or a poor PCM to engine ground.
