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Ford Bronco Backup Lamps Wiring Diagram 93-2 - MLP Sensor E4OD/4R70W Circuits
Backup lamp wiring diagram showing the E4OD/4R70W manual lever position sensor and starting/all-wheel-drive circuits.
This document is page 93-2, "Backup Lamps," from a Ford wiring diagram manual. It shows the wiring for the Manual Lever Position (MLP) sensor used with the 4R70W or E4OD automatic transmissions, explaining that with the transmission in REVERSE the MLP sensor directs current to illuminate the backup lamps. Circuits entering the sensor 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) for 4R70W or E4OD transmissions, and circuit 359 (GY/R) through connector C1012 from the E4OD (pages 30-1, 30-4) or 4R70W (page 29-4) transmission. Outputs include circuit 32 (R/LB, 12V in Park or Neutral) to the starting system, circuit 57 (BK, ground/0V) to all-wheel drive, circuit 140 (BK/PK, 12V in REVERSE) to the backup lamps, and circuit 199 (LB/Y) via connector C1012 back to the transmission circuits. The diagram shows the sensor's internal contacts for P, R, N, and D positions plus a resistor network, and references page 149-10 for MLP switch testing procedures. Readers can identify wire colors, circuit numbers, connector C1012, and cross-referenced pages for related systems.
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Frequently asked questions
- What makes the backup lamps illuminate according to this diagram?
- With the transmission in REVERSE, the manual lever position (MLP) sensor directs current to illuminate the backup lamps.
- What wire circuit carries 12V in REVERSE to the backup lamps?
- Circuit 140, wire color BK/PK (black/pink), carries 12V when the transmission is in REVERSE.
- Where can I find MLP sensor switch testing procedures?
- The diagram refers to page 149-10 for switch testing of the Manual Lever Position (MLP) sensor.
- What connector links the MLP sensor circuits to the transmission wiring?
- Connector C1012 carries circuit 359 (GY/R) in and circuit 199 (LB/Y) out to the E4OD (page 30-1) or 4R70W (page 29-4) transmission circuits.
- Which circuits connect the MLP sensor to the starting system?
- Circuit 33 (W/PK, 12V in START) feeds into the sensor and circuit 32 (R/LB, 12V in Park or Neutral) goes out to the starting system, referenced on pages 20-2 and 20-4.
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