Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSFORD2004MUSTANG BASE, 2D COUPE, 3.9 6, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2542 (ENGINE CONTROLS - PINPOINT TEST A: NO START THROUGH PINPOINT TEST DK: ACCELERATOR PEDAL POSITION (APP) SENSOR - (EXCEPT DIESEL & HYBRID))PINPOINT TEST B: POWERTRAIN CONTROL MODULE (PCM) POWER RELAYINTRODUCTION
2004 Ford Mustang Base, 2D Coupe, 3.9 6, Automatic
PINPOINT TEST B: Powertrain Control Module (PCM) Power Relay: Introduction
2004 Ford Mustang Base, 2D Coupe, 3.9 6, AutomaticSECTION Introduction
WARNING: This page does not describe the selected car, but rather 22 other vehicles, including the 2011 Mercury Milan, 2011 Mercury Mariner, 2011 Mercury Grand Marquis, 2011 Lincoln Town Car, and 2011 Lincoln Navigator L. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The IGN START/RUN and ground circuits, or the B+ and VPWR circuits may be reversed in the harness connector. Refer to the appropriate Wiring Diagrams Manual Electronic Engine Control Cell for schematic and connector information.
This pinpoint test is intended to diagnose the following:
- harness circuits: B+, IGN START/RUN, INJPWRM, ISP-R, PCMRC, VPWR and GND
- PCM power relay (12A646)
- PCM (12A650)
Powertrain Control Module (PCM) Connector
For PCM connector views or reference values, refer to REFERENCE VALUES .
POWERTRAIN CONTROL MODULE CONNECTOR PINS REFERENCE CHART
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| Crown Victoria, Grand Marquis, Ranger, Town Car | 170 PIN | B35, B36 | VPWR |
| E-Series 6.8L | 170 PIN | E23 B35, B36 B31 B37 |
INJPWRM VPWR ISP-R PCMRC |
| Edge, MKX | 190-PIN | B33 B67, B68 B42 B38 |
INJPWRM VPWR ISP-R PCMRC |
| Explorer | 190-PIN | B67, B68 B48 B38 |
VPWR ISP-R PCMRC |
| F-150 6.2L, F-150 5.0L, F-150 3.7L | 190-PIN | B67, B68 B42 B38 |
VPWR ISP-R PCMRC |
| F-150 3.5L | 198 PIN | B101, B102, B103 B48 B58 |
VPWR ISP-R PCMRC |
| Fiesta | 128 PIN | B11, B12, B8 B8 B1 |
VPWR ISP-R PCMRC |
| Flex 4V 3.5L, MKS 3.7L, MKT 3.7L, Taurus 4V 3.5L | 190-PIN | B33 B51, B52, B53 B7 B8 |
INJPWRM VPWR ISP-R PCMRC |
| Flex GTDI 3.5L, MKS 3.5L, MKT 3.5L, Taurus GTDI 3.5L | 190-PIN | B21 B35, B36, B51 B42 B38 |
INJPWRM VPWR ISP-R PCMRC |
| Fusion 3.5L, MKZ | 140 PIN | B45 B51, B52 B37 B35 |
INJPWRM VPWR ISP-R PCMRC |
| All other vehicles | 190-PIN | B21 B67, B68 B42 B38 |
INJPWRM VPWR ISP-R PCMRC |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.