Pinpoint Test 10

Flow Chart No. 10 - Symptom - Individual backup lamp inoperative.

Step 1
Bulb and socket.
1. Remove bulb, then check bulb for broken filament. Check bulb socket for corrosion or damage.




2. Are bulb and lamp serviceable?

Step 2
Battery feed to backup lamp.




1. Disconnect wiring at lamp, set parking brake and shift transmission into reverse.
2. Turn ignition switch on.
3. Check for battery voltage at connector feed terminal.




4. Is battery voltage present?

Step 3
Backup lamp ground.




1. Check for continuity between connector ground terminal and clean chassis ground.




2. Is there continuity?