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1996 Ford Bronco Backup Lamps Wiring Diagram 93-2 - MLP Sensor, E4OD/4R70W

Wiring diagram for backup lamps showing manual lever position sensor and starting/all-wheel-drive circuits for 4R70W/E4OD transmission.

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This is page 93-2, "Backup Lamps," from a Ford factory wiring diagram manual, uploaded to a 1996 Ford Bronco gallery. It shows the backup lamp circuit as it passes through the Manual Lever Position (MLP) sensor used with the 4R70W or E4OD automatic transmission. A callout explains that with the transmission in REVERSE, the MLP sensor directs current to illuminate the backup lamps. Incoming circuits at the top include circuit 33 (W/PK, 12V in START) from the starting system (pages 20-2, 20-4), circuit 463 (R/W) from the all-wheel drive system (page 34-1), circuit 298 (P/O, 12V in RUN), and circuit 359 (GY/R) through connector C1012 from the E4OD (pages 30-1, 30-4) or 4R70W (page 29-4) transmission circuits. Outgoing circuits at the bottom include circuit 32 (R/LB, 12V in Park or Neutral) to the starting system, circuit 57 (BK, 0V/ground) to the all-wheel drive system, circuit 140 (BK/PK, 12V in REVERSE) feeding the backup lamps, and circuit 199 (LB/Y) through C1012 back to the transmission circuits. The MLP sensor switch contacts for P, R, N, and D positions are illustrated, with a note referencing page 149-10 for switch testing. Readers can learn circuit numbers, wire colors, expected voltages by gear position, and cross-referenced pages for related systems.

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Frequently asked questions

What wire color and circuit carries 12V in reverse for the backup lamps?
Circuit 140, BK/PK (black/pink), carries 12V when the transmission is in REVERSE.
How do the backup lamps get power in reverse?
With the transmission in REVERSE, the manual lever position (MLP) sensor directs current to illuminate the backup lamps.
Which transmissions does this backup lamp diagram apply to?
The diagram applies to the 4R70W or E4OD transmission, referencing E4OD pages 30-1 and 30-4 and 4R70W page 29-4.
Where can I find MLP sensor switch testing information?
The diagram states to see page 149-10 for switch testing of the Manual Lever Position (MLP) sensor.
What circuit provides 12V in Park or Neutral to the starting system?
Circuit 32, R/LB (red/light blue), carries 12V in Park or Neutral and connects to the starting system on pages 20-2 and 20-4.

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