Test Y: The Reversing Lamps Are On Continuously

PINPOINT TEST Y: THE REVERSING LAMPS ARE ON CONTINUOUSLY

Y1-Y4:

Y4-Y6:

Normal Operation
Under normal operation, when the powertrain control module (PCM) detects the transmission is in REVERSE, a signal is sent to the SJB over the communication network. The SJB then sends voltage to the reversing lamps through circuit (LH) 1362 (DG/OG)/1367 (WH/YE) and (RH) 1367 (WH/YE). Ground for the lamps is provided through 1205 (BK).

NOTE: Manual transmission equipped vehicles only.

When the transmission is placed in REVERSE, the reversing lamps switch closes and provides ground to the PCM through circuit 1789 (VT/WH).

Possible Causes
- A short to voltage in circuit 1362 (DG/OG) or 1367 (WH/YE)
- A short to ground in circuit 1789 (VT/WH)
- Smart junction box (SJB)
- Powertrain control module (PCM)