Back-Up Lamp Problem

Test 540 - 544:

Test 545 - 551:

Test 552 - 555:

Symptom:
BACK-UP LAMP PROBLEM

POSSIBLE CAUSES
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
FUSED IGNITION SWITCH OUTPUT CIRCUIT TO TRS SHORTED
TRS CONNECTOR DAMAGED
TRS REVERSE SWITCH ALWAYS CLOSED
TRS REVERSE SWITCH DEFECTIVE
TRS SWITCHES CLOSE IN WRONG POSITION
BACK-UP LAMP BULB DEFECTIVE
INTERNAL SHIFT SYSTEM COMPONENTS DAMAGED
INTERNAL SHIFT SYSTEM COMPONENTS WORN OR BROKEN PARTS
REVERSE LAMP SENSE CIRCUIT OPEN
REVERSE LAMP SENSE CIRCUIT SHORTED TO GND
REVERSE LAMP SENSE CIRCUIT SHORTED TO VOLTAGE
SHIFTER LINKAGE OUT OF ADJUSTMENT
SHIFTER, SHIFT CABLE, SHIFT LEVER DAMAGE