Entry Light Control Circuit Input Test

1.Remove the gauge assembly.

2.Disconnect the 20P connector (A) and 30P connector (B) from the gauge assembly (C).

 

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 terminals look OK, go to 5.

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 
A9 BLK Under all conditions Check for continuity to ground:
There should be continuity. 
  • Poor ground (G401)
  • An open in the wire
 
A11 
A1 WHT/RED Under all conditions Check for voltage to ground:
There should be battery voltage. 
  • Blown No.8 (15 A) fuse in the under-hood fuse/relay box
  • An open in the wire
 
A2 YEL ignition switch ON (ll) Check for voltage to ground:
There should be battery voltage. 
  • Blown No. 16 (7.5 A) fuse in the under-hood fuse/relay box
  • An open in the wire
 
A12 GRN/RED Ceiling light switch in middle position. Attach to ground:
The ceiling light should come on. 
  • Blown No. 8 (15 A) fuse in the under-hood fuse/relay box
  • Faulty ceiling light
  • An open in the wire
 
C12 BLU/ORN Under all conditions Check for continuity between the C12 terminal and keyless receiver unit 5P connector No.2 terminal:
There should be continuity. 
  • An open in the wire
 

5.Reconnect the connectors to the gauge assembly, and make sure these input tests at the appropriate connectors on the gauge assembly.

  • If any test indicates a problem, find and correct the cause, then recheck the system.
  • If all the input tests prove OK, the gauge internal circuit must be faulty; replace the gauge assembly.

Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 
P14 GRN Driver's door open Check for voltage to ground:
There should be 1 V or less. 
  • Faulty driver's door switch
  • An open in the wire
 
Driver's door closed Check for voltage to ground:
There should be 5 V or more. 
  • Faulty Faulty driver's door switch
  • Short to ground
 
A13 LT
GRN/RED 
Front passenger's door open Check for voltage to ground:
There should be 1 V or less. 
  • Faulty driver's door switch
  • An open in the wire
 
Front passenger's door closed Check for voltage to ground:
There should be 5 V or more. 
  • Faulty driver's door switch
  • Short to ground
 
A16 GRN/RED Left (right) rear door open Check for voltage to ground:
There should be 1 V or less. 
  • Faulty driver's door switch
  • An open in the wire
 
Left (right) rear door closed Check for voltage to ground:
There should be 5 V or more. 
  • Faulty driver's door switch
  • Short to ground
 
Tailgate open Check for voltage to ground:
There should be 1 V or less. 
  • Faulty tailgate latch switch
  • An open in the wire
 
Tailgate closed Check for voltage to ground:
There should be 5 V or more. 
  • Faulty tailgate latch switch
  • Short to ground
 
C5 BLU/RED ignition key inserted into the ignition switch Check for voltage to ground:
There should be 1 V or less. 
  • Poor ground (G401)
  • Faulty ignition key switch
  • An open in the wire
 
Ignition key removed from the ignition switch Check for voltage to ground:
There should be 5 V or more. 
  • Faulty ignition key switch
  • Short to ground
 
C2 WHT/BLK Driver's door lock knob switch locked Check for voltage to ground:
There should be 1 V or less. 
  • Poor ground (G401)
  • Faulty driver's door lock knob switch
  • An open in the wire
 
Driver's door lock knob switch unlocked Check for voltage to ground:
There should be 5 V or more. 
  • Faulty driver's door lock knob switch
  • Short to ground