What circuit feeds the ignition coil and distributor on this diagram?

Circuit 16 R/LG (red/light green) from the engine compartment fuse box, through connector C202, a 20A fuse, and splices S148 and S199, feeds the Ignition Control Module (C1021), Radio Capacitor (C1017), Ignition Coil (C1008), and Distributor (C178).

Which vehicles use the fog lamp relay shown here?

The fog lamp relay is labeled "Lightning Only." It is fed by circuits 275 Y and 477 LB/BK (through a 15A fuse) and outputs circuit 478 T/O through splice S140 to the left fog lamp (C113) and right fog lamp (C114), covered on page 86-1.

What powers the PCM power relay?

Power comes from the engine compartment fuse box (page 13-3) through a 20A fuse and the PCM Power Diode on circuit 175 BK/Y, then circuit 37 Y to the PCM Power Relay, with output on circuit 361 R. The PCM connects at C185 (pages 23-1, 24-1, 25-1, 26-1).

Where does the ground circuit 57 BK terminate?

Circuit 57 BK passes through splice S102 and terminates at ground G100; the diagram references "See Grounds, Page 10-1."

What fuse ratings appear on this power distribution page?

Three fuses are shown: a 20A fuse on the 16 R/LG ignition feed, a 20A fuse on the PCM power feed, and a 15A fuse on the fog lamp feed.

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1994 Ford F-Series/Bronco Power Distribution Wiring Diagram - Gasoline (13-5)

Ford EVTM page 13-5: power distribution wiring diagram with PCM power relay and fog lamps

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Power distribution wiring diagram showing the PCM power relay, ignition control module, fog lamp relay and related fog lamp circuits.

AI caption July 2017 · Photo 301 of 386

This is page 13-5 ("Power Distribution, Gasoline") of a Ford factory wiring manual, hand-marked "94" indicating the 1994 model year. The diagram shows power distribution from the engine compartment fuse box (via splice S206 on page 13-3) through a 20A fuse and connector C202 on circuit 16 R/LG, feeding splices S148 and S199 and connector C101. From S199, circuit 16 R/LG branches to the Ignition Control Module (ICM, connector C1021), Radio Capacitor (C1017), Ignition Coil (C1008), and Distributor (C178), all detailed on page 21-1. A second feed from the engine compartment fuse box (page 13-3) passes through 20A and 15A fuses to the PCM Power Diode (circuit 175 BK/Y), the PCM Power Relay (circuits 37 Y and 361 R), and a Fog Lamp Relay marked "Lightning Only" (circuits 275 Y, 477 LB/BK, 361 R). Fog lamp relay output 478 T/O goes through splice S140 to the left (C113) and right (C114) fog lamps on page 86-1. Ground circuit 57 BK runs through splice S102 to ground G100, with a reference to grounds on page 10-1, and circuit connections to the PCM at connector C185 (PCM pages 23-1, 24-1, 25-1, 26-1).

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Frequently asked questions

What circuit feeds the ignition coil and distributor on this diagram?: Circuit 16 R/LG (red/light green) from the engine compartment fuse box, through connector C202, a 20A fuse, and splices S148 and S199, feeds the Ignition Control Module (C1021), Radio Capacitor (C1017), Ignition Coil (C1008), and Distributor (C178).
Which vehicles use the fog lamp relay shown here?: The fog lamp relay is labeled "Lightning Only." It is fed by circuits 275 Y and 477 LB/BK (through a 15A fuse) and outputs circuit 478 T/O through splice S140 to the left fog lamp (C113) and right fog lamp (C114), covered on page 86-1.
What powers the PCM power relay?: Power comes from the engine compartment fuse box (page 13-3) through a 20A fuse and the PCM Power Diode on circuit 175 BK/Y, then circuit 37 Y to the PCM Power Relay, with output on circuit 361 R. The PCM connects at C185 (pages 23-1, 24-1, 25-1, 26-1).
Where does the ground circuit 57 BK terminate?: Circuit 57 BK passes through splice S102 and terminates at ground G100; the diagram references "See Grounds, Page 10-1."
What fuse ratings appear on this power distribution page?: Three fuses are shown: a 20A fuse on the 16 R/LG ignition feed, a 20A fuse on the PCM power feed, and a 15A fuse on the fog lamp feed.