What powers the PCM power relay on a 1996 Bronco?

A hot-at-all-times feed (BB) from the engine compartment fuse box through a 30 A fuse, on circuit 37 Yellow wire, feeds the PCM power relay and PCM power diode (wire 175 BK/Y).

What fuse feeds the ignition coil, ICM, and distributor circuit?

Fuse 22, a 20 A fuse in the Engine Compartment Fuse Box, feeds the 16-gauge R/LG circuit that branches to the Ignition Control Module (C1021 pin 4), Radio Capacitor (C1017), Ignition Coil (C1008), and Distributor (C178, pin 1).

Where does the PCM power relay circuit ground?

Through wire 57 Black, via splice S102, to ground G100. Additional grounds are shown on page 10-1.

Which splices appear on this power distribution page?

Splices S148, S199, S102, and S104 are shown, plus reference to S208 on page 13-3.

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1996 Ford Bronco Wiring Diagram 13-5 Power Distribution - PCM Relay & Ignition

96 Bronco 13-5 Power Distribution wiring diagram: PCM power relay/diode, ignition control module, distributor

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Power distribution wiring diagram for 1996 Ford Bronco showing PCM power relay, ignition module and distributor circuits.

AI caption July 2017 · Photo 265 of 386

This document is page 13-5 ("Power Distribution") of a factory-style wiring diagram set, hand-labeled "96 Bronco." It shows two power feeds: one from splice S208 (page 13-3) through connectors C202F/C202M on a 16-gauge red/light-green (R/LG) wire into fuse 22 (20 A) in the Engine Compartment Fuse Box, and one hot-at-all-times feed (BB) from the engine compartment fuse box through a 30 A fuse. The fused R/LG circuit branches at splices S148 and S199 (through connector C101M/C101F) to feed the Ignition Control Module (ICM, connector C1021 pin 4), the Radio Capacitor (C1017F/C1017M), the Ignition Coil (C1008), and the Distributor (C178M/C178F pin 1), all detailed on page 21-1. The 30 A circuit feeds wire 37 (Yellow) to the PCM Power Relay (pins 85/30/86/87) and PCM Power Diode (wire 175 BK/Y); relay output 361 (Red) and wire 37 Y via splice S104 feed the Powertrain Control Module at connector C185 pin 55 (pages 24-1, 25-1). Ground wire 57 (Black) runs through splice S102 to ground G100 (grounds on page 10-1). Readers can trace ignition/PCM power circuits, wire gauges, colors, circuit numbers, splices, and connector identities.

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Frequently asked questions

What powers the PCM power relay on a 1996 Bronco?: A hot-at-all-times feed (BB) from the engine compartment fuse box through a 30 A fuse, on circuit 37 Yellow wire, feeds the PCM power relay and PCM power diode (wire 175 BK/Y).
What fuse feeds the ignition coil, ICM, and distributor circuit?: Fuse 22, a 20 A fuse in the Engine Compartment Fuse Box, feeds the 16-gauge R/LG circuit that branches to the Ignition Control Module (C1021 pin 4), Radio Capacitor (C1017), Ignition Coil (C1008), and Distributor (C178, pin 1).
What wire goes to PCM connector C185?: Circuit 37 Yellow (via splice S104) goes to the Powertrain Control Module at connector C185, pin 55. The PCM is detailed on pages 24-1 and 25-1.
Where does the PCM power relay circuit ground?: Through wire 57 Black, via splice S102, to ground G100. Additional grounds are shown on page 10-1.
Which splices appear on this power distribution page?: Splices S148, S199, S102, and S104 are shown, plus reference to S208 on page 13-3.