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Ford 5.0L Engine Controls Wiring Diagram 24-7 - PCM, MIL & CPP Switch Circuits
Reference · 1992-1996 BroncoAll 411 wiring diagrams
Engine controls wiring diagram for 5.0L showing malfunction indicator lamp, ignition switch and clutch pedal position switch circuits.
Part of 1992-1996 Ford Bronco Wiring Diagrams
This is page 24-7, "Engine Controls, 5.0L," a wiring diagram from a Ford factory-style electrical manual covering the engine control (PCM) start/run circuits for the 5.0L engine. It shows the Hot in Start or Run feed from fuse panel position 17 (10A) via circuit 640 (R/Y wire) through splice S215 and connector C250 to the Malfunction Indicator Lamp (MIL) in the instrument cluster, then via circuit 658 (PK/LG) through C251, C202, the VIP Data Link Connector, and C198 to PCM pin 17. A note explains the MIL lights with the ignition ON before cranking and stays on if a fault develops. The ignition switch START circuit feeds circuit 32 (R/LB) through C269 and splice S224 to circuit 480 (P/Y), which routes through the Clutch Pedal Position (CPP) switch or jumper at C261, jumpered for E4OD/4R70W and C6 automatic transmissions, an actual CPP switch for manual transmissions (preventing startup with the clutch pedal released), then circuit 481 (GY/Y) through C202 and C185 to PCM pin 30. Also shown are PCM pins 5 and 29 (circuits 970 DG/W, 766 BK/LG to the 4R70W transmission, page 29-4) and pins 10 and 43 (circuits 883 PK/LB and 348 P to the air conditioner/heater, page 54-2). Cross-references include power distribution page 13-16 and starting system page 20-1.
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Frequently asked questions
- What fuse powers the Malfunction Indicator Lamp (MIL) circuit on the 5.0L?
- Fuse panel position 17, a 10A fuse on a Hot in Start or Run feed, supplies circuit 640 (R/Y wire) to the MIL in the instrument cluster (fuse panel details on pages 13-3 and 13-9).
- What wire color and circuit number connect the MIL to the PCM?
- Circuit 658, a PK/LG (pink/light green) wire, runs from the instrument cluster through C251, C202, the VIP Data Link Connector, and C198 to PCM pin 17.
- How does the Clutch Pedal Position (CPP) switch circuit differ by transmission?
- With E4OD/4R70W or C6 automatic transmissions, a CPP switch jumper is installed at C261. With a manual transmission an actual CPP switch is used, which prevents engine startup with the clutch pedal released. In all cases circuit 480 (P/Y) feeds in and circuit 481 (GY/Y) goes to PCM pin 30 via C202 and C185.
- When does the Malfunction Indicator Lamp light according to this diagram?
- The note states the indicator lights with the ignition switch in the ON position prior to cranking and goes off when the engine starts; if a fault develops in the engine control system, the PCM will turn on the indicator.
- Which PCM pins connect to the 4R70W transmission and A/C-heater circuits?
- PCM pins 5 and 29 (circuits 970 DG/W and 766 BK/LG) go to the 4R70W transmission (page 29-4), and pins 10 and 43 (circuits 883 PK/LB and 348 P, W/O E4OD or 4R70W) go to the air conditioner/heater (page 54-2).
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