Pinpoint Test 1: Both Reversing Lamps Are Inoperative

PINPOINT TEST 1: BOTH REVERSING LAMPS ARE INOPERATIVE

Normal Operation

Voltage is supplied from the battery junction box (BJB) fuse 27 (10A) to the coil side of the reversing lamps relay through circuit (GY). The reversing lamps relay switch side is supplied voltage by the BJB fuse 35 (10A) through circuit (Y/GY). The reversing lamps relay coil ground is controlled by the PCM (automatic transaxle) or the reversing lamp switch (manual transaxle) through circuit (L/W).
For vehicles with an automatic transaxle, when the transaxle is in REVERSE (R), the PCM provides ground to energize the reversing lamps relay.For vehicles with a manual transaxle, when the transaxle is in REVERSE (R), the reversing lamp switch completes the ground path through circuit (B/G) to energize the reversing lamps relay.When the reversing lamps relay is energized, voltage is routed to the reversing lamps through circuit (G/L). The reversing lamps share a common ground through circuit (B/GY).

Possible Causes
- Fuse
- Wiring, terminals or connectors
- Reversing lamps relay
- Reversing lamp switch (manual transaxle)
- PCM (automatic transaxle)

Diagnostic Procedure

CAUTION:Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.