FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
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Test T: The Reversing Lamps Are Inoperative

PINPOINT TEST T: THE REVERSING LAMPS ARE INOPERATIVE

Normal Operation
When the ignition switch is in the RUN position, voltage is provided to the digital transmission range (TR) sensor from the central junction box (CJB) through circuit 1789 (VT/WH). When the transmission is placed in REVERSE (R), the digital TR sensor routes voltage to the reversing lamps through circuit 140 (BK/PK). The reversing lamps share a ground with the license plate lamps through circuit 57 (BK).

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Digital TR sensor


T1-T3:






T3-T4: