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 MANUALSFORD2018MUSTANG GT PREMIUM, 2D CONVERTIBLE, AUTOMATIC TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXDTC INDEX (PEDESTRIAN PROTECTION SYSTEM - WIPER & WASHER SYSTEM)WINDOWS AND GLASS DTCSFRONT CONTROLS INTERFACE MODULE (FCIM)
2018 Ford Mustang GT Premium, 2D Convertible, Automatic Trans
Front Controls Interface Module (FCIM)
2018 Ford Mustang GT Premium, 2D Convertible, Automatic TransSECTION Front Controls Interface Module (FCIM)
DTC INDEX
| DTC | Description | Action |
|---|---|---|
| B1C83:12 | Rear Defog Relay: Circuit Short to Battery | GO to Pinpoint Test K |
| B1C83:14 | Rear Defog Relay: Circuit Short To Ground or Open | If the defrost is inoperative, GO to Pinpoint Test K If the defrost does not shut off, GO to Pinpoint Test L |
| All other Diagnostic Trouble Codes (DTCs) | - | REFER to: Climate Control System - Vehicles With: Electronic Manual Temperature Control (EMTC) . REFER to: CLIMATE CONTROL SYSTEM - VEHICLES WITH: DUAL AUTOMATIC TEMPERATURE CONTROL (DATC) . |
RENDER: 1.0x
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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.