1997-03 FORD F-150 F-250 F-350 F-450 EXCURSION 4X4 GEM MODULE REPAIR

## What is the GEM / CTM module? - The GEM (sometimes called CTM = Central Timer Module) is essentially the body control / multifunction control module for many of the comfort, lighting, and body systems. - It monitors inputs (switches, sensors, wiring) and drives outputs such as:   • Wipers / washer   • Dome/courtesy lights   • Power windows/door locks   • Turn signals/hazard lights   • Immobilizer/security / keyless entry   • 4×4 shift control (in some models)   • Other timed or multiplexed circuits - In short, the GEM is the brain behind many non‑engine electrical functions. When it fails or malfunctions, symptoms can be widespread, confusing, and intermittent. * * * ## THIS IS NOT A PART FOR SALE. IT IS A REPAIR SERVICE Ship to: CircuitMotive 15046 Manchester Rd. Ballwin, MO 63011 ## Common Symptoms / Failure Modes These are among the more frequently encountered problems when a GEM module is failing or has failed: SymptomPossible Cause / NotesWipers stop working or behave erratically                The GEM may fail to drive the wiper relays or misinterpret switch inputs. Power windows / locks fail Output drivers inside the module can fail, or internal circuit damage may prevent responses. Interior / dome / courtesy lights stuck on or off  GEM handles the logic/timer for these; faults may cause lights to stay on and drain battery. Sudden battery drain / parasitic draw   A stuck output or internal short in the GEM may draw current even with ignition off.Turn signals, hazard lights, or lighting issues  The module drives many lighting circuits; internal transistor/relay failures or internal shorting can cause issues.4×4 shift control failures (no response)On models where the GEM handles 4×4 switching logic, faults here will disable engagement. Intermittent or no response after installation of a  replacementMismatched part number, missing programming or module configuration, or internal damage. Water‑related failures, corrosion One of the most cited root causes is water intrusion leaking onto or into the module.

• Other Part Number: F81B-14B205-FC F81B-14B205-FB F81B-14B205-EN F81B-14B205-EL
• Maximum Amperage: Refer to owners manual for PCM fuse amperage
• Manufacturer Part Number: 2C3T-14B205-AA 2C3T14B205AA F81B-14B205-EP
• Terminal Type: Pin
• Item Length: 12"
• Placement on Vehicle: Dashboard
• Brand: Ford
• Type: GEM General Electronic Module
• Manufacturer Warranty: 6 Month
• OE/OEM Part Number: 3C3T-14B205-AB 3C3T14B205AB 2C3T-14B205-AB
• Item Height: 12"
• Features: Durability Tested
• Terminal Quantity: 3
• Item Width: 12"