Cargo Area Light Control Unit Input Test

  1. Disconnect the 5P connector (A) from the cargo area light control unit (B).
  1. Inspect the connector and socket terminals to be sure they are all making good contact.
    • If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
    • If the tarminals look OK, go to Step 4 .
  1. With the connector still disconnected, make these input tests at the connector.
    • If any test indicates a problem, find and correct the cause, then recheck the system.
    • If all the input tests prove OK, go to Step 5 .
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if result is not obtained
    3
    WHT/BLU
    Under all conditions
    Check for voltage to ground: There should be battry voltage.
    • Blown No. 6 (10 A) fuse in the under-dash fuse/relay box
    • An open in the wire
    5
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G702)
    • An open in the wire
    4
    BLU/YEL
    Cargo area switch ON
    Attach to ground: Cargo area light should come on.
    • Blown No. 6 (10 A) fuse in the under-dash fuse/relay box
    • Faulty cargo area light
    • An open in the wire

  1. Reconnect the 5P connector to the cargo area light control unit, and perform the following input tests.
    • If any test indicates a problem, find and correct the cause, then recheck the system.
    • If all the input tests prove OK, the control unit must be faulty; replace the cargo area light control unit.
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if result is not obtained
    2
    BLU/BLK
    Tailgate open
    Check for voltage to ground: There should be 1 V or less.
    • Poor ground (G702)
    • Faulty tailgate latch switch
    • An open in the wire
    Tailgate close
    Check for voltage to ground: There should be 5 V or more.
    • Faulty tailgate latch switch
    • A short to ground in the wire