Cargo Area Light Control Unit Input Test

1.Remove the right side trim panel.

2.Disconnect the 5P connector (A) from the cargo area light control unit (B).

3.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 4.

4.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 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 (10A) 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 (10A) fuse in the under-dash fuse/relay box
  • Faulty cargo area light
  • An open in the wire
 


5.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