Test Q: The Reversing Lamps Are Inoperative

PINPOINT TEST Q: THE REVERSING LAMPS ARE INOPERATIVE

Q1-Q3:

Q3 Continued:

Normal Operation
The smart junction box (SJB) provides voltage to the digital transmission range (TR) sensor through circuit 1039 (BK/YE) with the ignition switch in the RUN position. When the transmission is placed in REVERSE, the digital TR sensor routes the voltage to the reversing lamps through circuit 140 (BK/PK). The reversing lamps share the same ground through circuit 57 (BK).

Possible Causes
- Fuse
- Circuit 57 (BK) open
- Circuit 140 (BK/PK) open
- Circuit 1039 (BK/YE) open
- Digital TR sensor