What fuse powers the EEC/PCM system through the engine compartment fuse box?

A 20A EEC fuse in the engine compartment fuse box (page 13-5), Hot at All Times, feeding circuit 554 V/BK.

What does the Brake On/Off (BOO) switch do in this circuit?

The BOO switch sends a signal to the PCM to disengage the torque converter clutch when the brake pedal is depressed. The PCM may ignore this signal if the TP signal is above closed throttle.

What wire color and circuit number are the PCM grounds?

PCM pins 24, 51, 76, 77, and 103 ground through circuit 570 BK/W (black/white) via S114 to grounds G102 and via S141/S106; pin 25 grounds through circuit 57 BK to G101.

What powers the BOO switch?

A 15A fuse in the I/P fuse panel (page 13-8), Hot at All Times, on circuit 10 LG/R (light green/red).

What does the A/C WOT cutout relay connect to?

It is located in the relay center and connects via circuits 198 DG/O, 347 BK/Y, and 73 O/LB to the air conditioner/heater (page 54-3) or EATC (page 55-3) systems and to the PCM.

Home/ Registry/ Ford/ Crown Victoria/ 1992-1997/ 1992 Ford Crown Victoria/ Photo supermotors.net/registry/media/484927

Ford Crown Victoria PCM Power, Ground & BOO Switch Wiring Diagram (Gasoline)

Gasoline engine wiring diagram showing PCM power, relays and A/C cutout circuits

‹ ›

Wiring diagram for a gasoline engine showing PCM power diode, power relay, BOO switch and A/C WOT cutout relay circuits.

AI caption February 2007 · Photo 45 of 185

This document is a Ford gasoline-engine powertrain control module (PCM) power, ground, and relay wiring diagram. It shows three power feeds: a 25A instrument panel fuse (Hot in Start or Run) feeding circuit 16 R/LG through connectors C102F/C102M to the PCM power diode and PCM power relay; a 20A EEC fuse in the engine compartment fuse box (Hot at All Times) feeding circuit 554 V/BK to the Data Link Connector, relay center, and PCM power relay; and a 15A fuse feeding circuit 10 LG/R to the Brake On/Off (BOO) switch, which sends circuit 511 LG to PCM pin 32 when the brake pedal is depressed (used to disengage the torque converter clutch). The diagram also shows the A/C WOT cutout relay in the relay center with circuits 198 DG/O, 347 BK/Y, and 73 O/LB tied to the air conditioner/heater or EATC systems and PCM pins 73 and 63. Grounding is shown via circuit 570 BK/W from PCM pins 24, 51, 76, 77, and 103 through splices S114, S141, and S106 to grounds G102 and G101, plus circuit 57 BK from pin 25. Cross-references point to power distribution pages 13-5, 13-8, 13-10, 13-12, grounds pages 10-1 and 10-4, and A/C pages 54-3/55-3.

Is this accurate? Sign in to help verify it.

Frequently asked questions

What fuse powers the EEC/PCM system through the engine compartment fuse box?: A 20A EEC fuse in the engine compartment fuse box (page 13-5), Hot at All Times, feeding circuit 554 V/BK.
What does the Brake On/Off (BOO) switch do in this circuit?: The BOO switch sends a signal to the PCM to disengage the torque converter clutch when the brake pedal is depressed. The PCM may ignore this signal if the TP signal is above closed throttle.
What wire color and circuit number are the PCM grounds?: PCM pins 24, 51, 76, 77, and 103 ground through circuit 570 BK/W (black/white) via S114 to grounds G102 and via S141/S106; pin 25 grounds through circuit 57 BK to G101.
What powers the BOO switch?: A 15A fuse in the I/P fuse panel (page 13-8), Hot at All Times, on circuit 10 LG/R (light green/red).
What does the A/C WOT cutout relay connect to?: It is located in the relay center and connects via circuits 198 DG/O, 347 BK/Y, and 73 O/LB to the air conditioner/heater (page 54-3) or EATC (page 55-3) systems and to the PCM.