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.
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HOMESERVICE MANUALSFORD2004PICKUP F350 SUPER DUTY, 4D PICKUP, 6.8 S, RWD, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - THEORY & OPERATION - CNG, FLEX-FUEL & GASOLINEPOWERTRAIN CONTROL HARDWAREPOWERTRAIN CONTROL MODULEPCM LOCATIONS
2004 Ford Pickup F350 Super Duty, 4D Pickup, 6.8 S, RWD, Automatic
PCM Locations
2004 Ford Pickup F350 Super Duty, 4D Pickup, 6.8 S, RWD, AutomaticSECTION PCM Locations
NOTE:
For PCM Removal and Installation procedures refer to the appropriate ELECTRONIC ENGINE CONTROLS
.
- Focus - passenger side behind kick panel.
- Taurus/Sable, Freestar/Monterey - behind glove compartment (access from engine compartment dash panel) on passenger side.
- Mustang - behind kick panel cover on passenger side, near instrument panel.
- Crown Victoria/Grand Marquis, Marauder, Town Car - behind instrument panel (cowl), driver side near brake pedal.
- LS6/LS8, Thunderbird, Explorer/Mountaineer, Aviator- passenger side, near side cowl, behind glove compartment.
- Escape, Explorer Sport Trac, Ranger - behind instrument panel (cowl), center to both driver and passenger sides (Access from engine compartment).
- Expedition/Navigator, F150 (Non-Heritage) - passenger side of engine compartment, mounted to the cowl.
- F-Series Heritage - lower dash panel on passenger side.
- Excursion, F -Series Super Duty - lower dash panel on driver side.
- E-Series - lower dash panel (cowl) on driver side (Access from engine compartment).
104-PIN PCM POWER AND GROUNDS
| Function | Description | Connector/Pin |
|---|---|---|
| VPWR | Voltage input to module | 71,97 |
| PWRGND | Power ground | 3,24,51,76,77,103 |
| CSEGND | Case ground | 25 |
| SIGRTN | Signal return | 91 |
| VREF | 5V reference | 90 |
| KAPWR | Keep alive power | 55 |
122-PIN PCM POWER AND GROUNDS
| Function | Description | Connector/Pin |
|---|---|---|
| VPWR | Voltage input to module | B34 |
| VPWR | Voltage input to module | B46 |
| PWRGND | Power ground | B1 |
| PWRGND | Power ground | B11 |
| PWRGND | Power ground | B23 |
| CSEGND | Case ground | B10 |
| SIGRTN | Connector B signal return | B33 |
| SIGRTN | Connector E signal return | E25 |
| SIGRTN | Connector T signal return | T27 |
| VREF | Connector B Buffered 5V reference | B45 |
| VREF | Connector E Buffered 5V reference | E36 |
| KAPWR | Keep alive power | B40 |
150-PIN PCM POWER AND GROUNDS
| Function | Description | Connector/Pin |
|---|---|---|
| VPWR | Voltage input to module | B32 |
| VPWR | Voltage input to module | B33 |
| PWRGND | Power ground | B24 |
| PWRGND | Power ground | B25 |
| PWRGND | Power ground | B26 |
| PWRGND | Power ground | B27 |
| CSEGND | Case ground | B43 |
| SIGRTN | Connector B signal return | B17 (B5 for LS6/LS8/ Thunderbird) |
| SIGRTN | Connector T signal return | T17 (T14 for LS6/LS8/ Thunderbird) |
| SIGRTN | Connector E signal return | E17 |
| VREF | Connector B Buffered 5V reference | B20 (B55 for LS6/LS8/ Thunderbird) |
| VREF | Connector E Buffered 5V reference | E20 (E14 for LS6/LS8/ Thunderbird) |
| KAPWR | Keep alive power | B44 |
150-PIN PCM POWER AND GROUNDS
| Function | Description | Connector/Pin |
|---|---|---|
| VPWR | Voltage input to module | B35 |
| VPWR | Voltage input to module | B36 |
| PWRGND | Power ground | B47 |
| PWRGND | Power ground | B48 |
| PWRGND | Power ground | B49 |
| CSEGND | Case ground | B10 |
| SIGRTN | Connector B signal return | B41 |
| SIGRTN | Connector T signal return | T41 |
| SIGRTN | Connector E signal return | E41 |
| VREF | Connector B Buffered 5V reference | B40 |
| VREF | Connector E Buffered 5V reference | E40 |
| KAPWR | Keep alive power | B45 |
190-PIN PCM POWER AND GROUNDS
| Function | Description | Connector/Pin |
|---|---|---|
| VPWR | Voltage input to module | B51 |
| VPWR | Voltage input to module | B52 |
| VPWR | Voltage input to module | B53 |
| PWRGND | Power ground | B67 |
| PWRGND | Power ground | B68 |
| PWRGND | Power ground | B69 |
| PWRGND | Power ground | B70 |
| CSEGND | Case ground | B66 |
| SIGRTN | Connector B signal return | B58 |
| SIGRTN | Connector T signal return | T43 |
| SIGRTN | Connector E signal return | E58 |
| VREF | Connector B Buffered 5V reference | B29 |
| VREF | Connector E Buffered 5V reference | E57 |
| KAPWR | Keep alive power | B54 |
RENDER: 1.0x
NO RELATED
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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.