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.
Front Control Module: Notes
The Front Control Module (FCM) is an electrical control and interface center located in the engine compartment. When it is mated to the Power Distribution Center (PDC), it is referred to as the Integrated Power Module (IPM). The IPM, with its fuses and relays provides power and signal distribution throughout most of the vehicle. The FCM receives both hard wire and digital electronic inputs from the vehicle electrical system through the PDC. Based on these inputs and the ignition switch position, it provides direct power feeds and relay control to some of the vehicles' most critical electrical systems.
The Front Control Module provides the following features:
Controlled power feeds:
- Front airbag system
- Side airbag system
- Headlamp power
- EATX module power (4 speed only)
- Front washer motor
- Rear washer motor
- Cabin Heater
- Brake shift interlock system
Relay controls:
- Fog lamp relay (when equipped)
- Park lamp relay
- Front wiper on relay
- Front wiper high/low relay
- Accessory relay
- Horn relay
- Front & rear blower relay
- Name brand speakers (NBS) relay
- Electronic back light (EBL) run only relay
Electrical inputs:
- Headlamp battery supplies 1 & 2
- Module battery supply
- Power ground
- Ignition switch RUN or START position status
- Ignition switch START only status
- PCI Bus
- Stop lamp switch
- Horn switch
- Back-up switch
- Wiper park switch
- Washer fluid level switch
- Brake fluid level switch
- Ambient temperature sensor
- Right park lamp outage
- Left park lamp outage
- Battery IOD
- Battery (+) connection detection
- Flash reprogramming voltage
Use the Manual With the Right Hardware
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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.
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