Troubleshooting Hints

(PERFORM BEFORE BEGINNING SYSTEM DIAGNOSIS)
1. CHECK Condition of TURN B/U Fuse 16. If Fuse is open, LOCATE and REPAIR source of overload and REPLACE Fuse.
2. CHECK Back Up Lamps for damage to filament or corrosion between bulb and socket.
3. CHECK adjustment of Back Up Lamps Switch.
4. CHECK that Ground G401 is clean and tight.
- REFER to "Computers and Control Systems"for Park/Neutral Position and Backup Switch access. Transmission Position Sensor/Switch
- CHECK for a broken (or partially broken) wire inside of the insulation which could cause system failure but prove "GOOD" in a Continuity/Voltage CHECK with a system disconnected. These Circuits may be intermittent or resistive when loaded, and if possible, should be checked by monitoring Fuse Voltage drop with the system operational (under load).
- CHECK for proper installation of aftermarket electronic equipment which may affect the integrity of other systems (Refer "Troubleshooting Procedures"). Diagnostic Aids