1. Remove the upper panel.

1. Disconect the 22P connector (A) from the hands free telephone control unit (B).

1. Inspect the connector and socket terminals for a good pinfit 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 Step 4 .

1. Reconnect the connector and 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
   --- | --- | --- | --- | ---
   13 | BLK | Under all conditions | Check for voltage to ground: There should be less than 1 V. |
   - Poor ground (G506)
   - An open in the wire
   11 | WHT | Under all conditions | Check for voltage to ground: There should be battery voltage. |
   - Blown No. 5 (20 A) fuse in the driver's under-dash fuse/relay box
   - An open in the wire
   1 | YEL *1 RED *2 | Ignition switch ACC (I) or ON (II) | Check for voltage to ground: There should be battery voltage. |
   - Blown No. 32 (7.5 A) fuse in the driver's under-dash fuse/relay box
   - An open in the wire

1. Disconnect the 22P connector again, and make this input test at the connector.
   - If the test indicates a problem, find and correct the cause, then recheck the system.
   - If the input test proves OK, the hands free telephone control unit must be faulty, replace it.

   Cavity | Wire | Test condition | Test: Desired result | Possible cause if result is not obtained
   --- | --- | --- | --- | ---
   14 | LT GRN | Under all conditions | Check for continuity between No. 14 terminal and the driver's under-dash fuse/relay box connector X (39P) terminal No. 22: There should be continuity. | An open in the wire
   Driver's under-dash fuse/relay box connector X (39P) disconnected | Check for continuity to ground: There should be no continuity. | Short to ground