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 MANUALSFORD2004MUSTANG BASE, 2D COUPE, 3.9 6, AUTOMATICREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSKEYLESS ENTRY SYSTEM AND COMPUTER OPERATED LOCK SYSTEMDIAGNOSIS AND TESTINGKEYLESS ENTRYGENERIC ELECTRONIC MODULE (GEM) DIAGNOSTIC TROUBLE CODE (DTC) INDEX
2004 Ford Mustang Base, 2D Coupe, 3.9 6, Automatic
Generic Electronic Module (GEM) Diagnostic Trouble Code (DTC) Index
2004 Ford Mustang Base, 2D Coupe, 3.9 6, AutomaticSECTION Generic Electronic Module (GEM) Diagnostic Trouble Code (DTC) Index
GENERIC ELECTRONIC MODULE (GEM) DIAGNOSTIC TROUBLE CODE (DTC) INDEX
| DTC | Description | Source | Action |
|---|---|---|---|
| B1217 | Horn Relay Coil Circuit Failure | GEM | GO to PINPOINT TEST E . |
| B1218 | Horn Relay Coil Circuit Short to Vbatt | GEM | GO to PINPOINT TEST E . |
| B1312 | Lamp Headlamp Input Circuit Short to Battery | GEM | refer to EXTERIOR LIGHTING . |
| B1317 | Battery Voltage High | GEM | refer to GENERATORS & REGULATORS . |
| B1318 | Battery Voltage Low | GEM | refer to GENERATORS & REGULATORS . |
| B1322 | Driver Door Ajar Circuit Short to Ground | GEM | refer to INTERIOR LIGHTING . |
| B1330 | Passenger Door Ajar Circuit Short to Ground | GEM | refer to INTERIOR LIGHTING . |
| B1334 | Decklid Ajar Rear Door Circuit Short to Ground | GEM | refer to INTERIOR LIGHTING . |
| B1339 | Chime Input Request Circuit Short to Battery | GEM | refer to WARNING DEVICES . |
| B1340 | Chime Input Request Circuit Short to Ground | GEM | refer to WARNING DEVICES . |
| B1342 | ECU Is Defective | GEM | CLEAR the DTC. Retrieve the DTCs. If DTC B1342 is retrieved, INSTALL a new GEM. refer to MULTIFUNCTION ELECTRONIC MODULE . |
| B1353 | Ignition Key-In Circuit Open | GEM | refer to WARNING DEVICES . |
| B1359 | Ignition Run/Ace Circuit Failure | GEM | refer to STEERING COLUMN SWITCHES . |
| B1396 | Power Door Lock Circuit Short to Battery | GEM | GO to PINPOINT TEST B . |
| B1397 | Power Door Unlock Circuit Short to Battery | GEM | GO to PINPOINT TEST B . |
| B1405 | Driver Power Window Down Circuit Short to Battery | GEM | refer to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS . |
| B1408 | Driver Power Window Up Circuit Short to Battery | GEM | refer to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS . |
| B1833 | Door Unlock Disarm Switch Circuit Short to Ground | GEM | refer to ANTI-THEFT - PATS . |
| B1498 | Decklid Punch-Out Sensor Ground Short. | GEM | GO to PINPOINT TEST D . |
| B1603 | Lamp Anti-Theft Indicator Circuit Failure | GEM | refer to INSTRUMENT CLUSTER . |
| B1410 | Driver Power Window Motor Circuit Failure | GEM | refer to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS . |
| B1426 | Lamp Safety Belt Circuit Short to Battery | GEM | refer to INSTRUMENT CLUSTER . |
| B1428 | Lamp Safety Belt Circuit Failure | GEM | refer to INSTRUMENT CLUSTER . |
| B1431 | Wiper Brake/Run Relay Circuit Failure | GEM | refer to WIPERS AND WASHERS . |
| B1432 | Wiper Brake/Run Relay Circuit Short to Battery | GEM | refer to WIPERS AND WASHERS . |
| B1434 | Wiper Hi/Low Speed Relay Coil Circuit Failure | GEM | refer to WIPERS AND WASHERS . |
| B1436 | Wiper Hi/Low Speed Relay Coil Circuit Short to Battery | GEM | refer to WIPERS AND WASHERS . |
| B1438 | Wiper Mode Select Switch Circuit Failure | GEM | refer to WIPERS AND WASHERS . |
| B1441 | Wiper Mode Select Switch Circuit Short to Ground | GEM | refer to WIPERS AND WASHERS . |
| B1446 | Wiper Park Sense Circuit Failure | GEM | refer to WIPERS AND WASHERS . |
| B1448 | Wiper Park Sense Circuit Short to Battery | GEM | refer to WIPERS AND WASHERS . |
| B1450 | Wiper Wash/Delay Switch Circuit Failure | GEM | refer to WIPERS AND WASHERS . |
| B1453 | Wiper Wash/Delay Switch Circuit Short to Ground | GEM | refer to WIPERS AND WASHERS . |
| B1458 | Wiper Washer Pump Motor Relay Circuit Failure | GEM | refer to WIPERS AND WASHERS . |
| B1460 | Wiper Washer Pump Motor Relay Coil Circuit Short to Battery | GEM | refer to WIPERS AND WASHERS . |
| B1462 | Safety Belt Switch Circuit Failure | GEM | refer to WARNING DEVICES . |
| B1466 | Wiper Hi/Low Speed Not Switching | GEM | refer to WIPERS AND WASHERS . |
| B1473 | Wiper Low Speed Circuit Motor Failure | GEM | refer to WIPERS AND WASHERS . |
| B1476 | Wiper High Speed Circuit Motor Failure | GEM | refer to WIPERS AND WASHERS . |
| B1551 | Decklid Release Circuit Failure | GEM | GO to PINPOINT TEST D . |
| B1553 | Decklid Release Circuit Short to Battery | GEM | GO to PINPOINT TEST D . |
| B1555 | Ignition Run/Start Circuit Failure | GEM | refer to STEERING COLUMN SWITCHES . |
| B1687 | Lamp Dome Input Circuit Short to Battery | GEM | refer to INTERIOR LIGHTING . |
| B2486 | LF Side Repeater Lamp Output Circuit Failure | GEM | refer to EXTERIOR LIGHTING . |
| B1605 | Lamp Anti-Theft Indicator Circuit Short to Battery | GEM | refer to WIPERS AND WASHERS . |
| B2488 | RF Side Repeater Lamp Output Circuit Failure | GEM | refer to EXTERIOR LIGHTING . |
| C1189 | Brake Fluid Level Sensor Input Short Circuit to Ground | GEM | refer to INSTRUMENT CLUSTER . |
| C1223 | Lamp Brake Warning Output Circuit Failure | GEM | refer to INSTRUMENT CLUSTER . |
| C1225 | Lamp Brake Warning Output Circuit Short to Battery | GEM | refer to INSTRUMENT CLUSTER . |
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.