What fuse powers the Malfunction Indicator Lamp (MIL) circuit on the 5.8L Bronco?

Fuse 17, a 10A fuse in the fuse panel (hot in START or RUN), feeds circuit 640 R/Y to the MIL in the instrument cluster.

What wire color runs from the MIL to the PCM?

Circuit 658 PK/LG (pink/light green) runs from the instrument cluster MIL through connectors C202F/C202M and the Data Link Connector (C198F) to PCM pin 17.

When does the MIL indicator light?

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.

What is the difference between the E4OD and manual transmission clutch pedal position circuits?

With the E4OD transmission, a CPP switch jumper is used at connector C261 (C202F is not used). With a manual transmission, an actual Clutch Pedal Position (CPP) switch is used, which prevents engine startup with the clutch pedal released; both feed circuit 481 GY/Y to PCM pin 30 (without E4OD).

What wire colors are in the clutch pedal position switch circuit?

Circuit 480 P/Y (12V in START) feeds the CPP switch or jumper at C261, and circuit 481 GY/Y returns to the PCM. The ignition switch feed is circuit 32 R/LB through connector C269 and splice S224.

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1995 Ford Bronco 5.8L Engine Controls Wiring Diagram - MIL & CPP Switch (Pg 25-5)

Engine Controls 5.8L wiring diagram page 25-5 with MIL lamp and clutch pedal position switch

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Wiring diagram of 5.8L engine controls showing malfunction indicator lamp, ignition switch, and clutch pedal position switch circuits.

Part of 1987-1991 Ford Bronco Wiring Diagrams

AI caption February 2011 · Photo 464 of 1787

This document is page 25-5 of the Engine Controls wiring diagram set for the 5.8L engine (from a 1995 Ford Bronco electrical/vacuum troubleshooting manual, per companion pages in the set). It shows the Malfunction Indicator Lamp (MIL) circuit and the Clutch Pedal Position (CPP) switch circuits feeding the Powertrain Control Module (PCM). Power comes from Fuse 17 (10A, hot in START or RUN) at the fuse panel through circuit 640 R/Y and splice S215 to the instrument cluster MIL (connector C250/C251), then through circuit 658 PK/LG via connectors C202F/C202M and the Data Link Connector (DLC, C198F) to PCM pin 17. A note explains the MIL lights with the ignition ON prior to cranking, goes off when the engine starts, and is turned on by the PCM if a fault develops. A second branch from the ignition switch (hot at all times, 12V in START) runs through C269, circuit 32 R/LB, splice S224 and circuit 480 P/Y to either a CPP switch jumper (E4OD automatic transmission) or an actual CPP switch (manual transmission, which prevents engine startup with the clutch pedal released), returning on circuit 481 GY/Y to PCM pin 30. Circuit 198 DG/O from the A/C-heater system connects to PCM pin 10. Cross-references include pages 13-3, 13-11, 20-1, 54-3, 60-3, and 149-2.

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Frequently asked questions

What fuse powers the Malfunction Indicator Lamp (MIL) circuit on the 5.8L Bronco?: Fuse 17, a 10A fuse in the fuse panel (hot in START or RUN), feeds circuit 640 R/Y to the MIL in the instrument cluster.
What wire color runs from the MIL to the PCM?: Circuit 658 PK/LG (pink/light green) runs from the instrument cluster MIL through connectors C202F/C202M and the Data Link Connector (C198F) to PCM pin 17.
When does the MIL indicator light?: 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.
What is the difference between the E4OD and manual transmission clutch pedal position circuits?: With the E4OD transmission, a CPP switch jumper is used at connector C261 (C202F is not used). With a manual transmission, an actual Clutch Pedal Position (CPP) switch is used, which prevents engine startup with the clutch pedal released; both feed circuit 481 GY/Y to PCM pin 30 (without E4OD).
What wire colors are in the clutch pedal position switch circuit?: Circuit 480 P/Y (12V in START) feeds the CPP switch or jumper at C261, and circuit 481 GY/Y returns to the PCM. The ignition switch feed is circuit 32 R/LB through connector C269 and splice S224.