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 MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSELECTRICAL COMPONENT LOCATIONSDIAGNOSTIC CONNECTOR (DLC) LOCATIONSDOMESTIC CARSFORD MOTOR CO.
1999 GMC Forward Control 5.7 R, Automatic
Ford Motor Co.
1999 GMC Forward Control 5.7 R, AutomaticSECTION Ford Motor Co.
NOTE:
This table provides a quick reference for self-diagnostic connector locations, when available from manufacturer, that ARE NOT
located at the lower left side of the dash, as mandated in 1996 by the Federal government.
FORD MOTOR CO. - DOMESTIC CARS
| Application | Connector Location | ||
|---|---|---|---|
| Bobcat & Pinto | On Center Of Right Fender Apron | ||
| Capri | |||
| 1980-85 | On Center Of Left Front Fender Apron | ||
| 1986 | On Left Rear Corner Of Engine Compartment | ||
| Continental | |||
| 1984-89 | On Right Rear Corner Of Engine Compartment | ||
| 1990-91 | On Right Rear Corner Of Firewall, On Electronic Assembly Cover | ||
| 1992 | On Right Fender Apron | ||
| 1993-94 | VIP Connectors (2) On Right Rear Of Engine Compartment, On PCM Cover | ||
| Contour & Mystique | |||
| 1995 | On Left Rear Corner Of Engine Compartment | ||
| Cougar & Thunderbird | |||
| 1982-90 | On Left Fender Apron | ||
| 1991 | On Rear Of Right Front Fender Panel | ||
| 1992 | Front Of Right Shock Tower | ||
| 1993 | 2 Connectors In Right Rear Corner Of Engine Compartment | ||
| 1994 | On Right Side Of Engine Compartment & Below Glove Box | ||
| 1995 | |||
| 3.8L | On Right Side Of Engine Compartment & Below Glove Box | ||
| 4.6L | Behind Right Side Of Dash, Below Glove Box | ||
| 1996 | Lower Right Side Of Dash, Below Glove Box | ||
| Crown Victoria, Grand Marquis & Lincoln Town Car | |||
| 1983 & 1987 | On Right Fender Apron | ||
| 1985-86 & 1988-90 | On Left Fender Apron | ||
| 1992 | On Left Front Fender Panel | ||
| 1993-94 | On Top Of Left Front Wheelwell | ||
| Escort, EXP, Lynx & Tracer | |||
| 1985-90 | On Right Fender Apron Near Firewall | ||
| 1991 | On Left Rear Of Engine Compartment | ||
| 1992 | On Right Rear Of Engine Compartment, Near Cowl | ||
| 1993-95 | On Left Side Of Firewall | ||
| LTD & Marquis | |||
| 1983 | On Left Fender Apron | ||
| 1984-86 | On Left Rear Corner Of Engine Compartment | ||
| Mark VII | |||
| 1984-87 | On Right Rear Corner Of Engine Compartment | ||
| 1988-90 | Front Of Right Fender Apron | ||
| 1991 | On Right Side Of Engine Compartment, Near Thermactor Solenoids | ||
| Mark VIII | |||
| 1993-96 | On Top Of Left Wheelwell | ||
| Mustang | |||
| 1980-85 | On Center Of Left Front Fender Apron | ||
| 1986-91 | On Left Rear Corner Of Engine Compartment | ||
| 1992 | On Left Shock Tower, Near Ignition Coil | ||
| 1993 | 2 Connectors On Right Front Strut Tower | ||
| 1994-95 | Behind Right Front Strut Tower & Right Of Steering Column | ||
| Probe | |||
| 1991-92 | On Left Rear Corner Of Engine Compartment | ||
| 1993 | DLC - Behind Left Side Of Dash; STI Connector - On Left Inner Fender Panel | ||
| 1994-95 | On Left Front Inner Fender Panel | ||
| Sable & Taurus | |||
| 1986-87 (3.0L Only) | Near Alternator | ||
| 1988-90 | |||
| 2.5L | On Engine Harness Near PCV Hose | ||
| 3.0L | On Right Rear Corner Of Engine Compartment | ||
| 1991 | On Right Rear Corner Of Engine Compartment, On ECA Cover | ||
| 1992 | On Right Rear Corner Of Engine Compartment, Below MAP Sensor | ||
| 1993-95 | Right Rear Of Engine Compartment | ||
| Tempo & Topaz | |||
| 1984-92 | On Right Rear Corner Of Engine Compartment | ||
| 1993-94 | In Engine Compartment, On Left Strut Tower | ||
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.