1. Identify the Problem:
* Manual Adjustment (Crank): Is the crank stiff, broken, or stripped? Does the seat move freely in some directions but not others?
* Electric Adjustment (Power Seats): Does the seat not move at all? Does it move intermittently? Does it move in only some directions? Is there a clicking sound? Do the seat adjustment controls work for other functions (e.g., lumbar support)? Does a fuse blow repeatedly?
* Specific Issue Areas: Is it a problem with the fore/aft movement, the seatback recline, the seat height, or the lumbar support?
2. Troubleshooting and Potential Fixes:
A. Manual Adjustments:
* Stiff Crank: Lubricate the crank mechanism with a penetrating lubricant like WD-40 (followed by a dry lubricant like graphite) and work the crank back and forth. If the problem persists, the mechanism might be seized and require more involved disassembly and repair.
* Broken Crank: The crank itself might need replacing. You'll likely need to source a replacement part from a Ford dealer or a parts supplier.
* Stripped Gears: This is a more serious issue requiring disassembly and likely replacement of internal gears.
B. Electric Adjustments:
* Check the Fuses: Consult your owner's manual to locate the fuse for the power seat and check if it's blown. Replace it with a fuse of the same rating. If it blows immediately after replacement, there's a short circuit somewhere in the system.
* Check the Wiring: Inspect the wiring harness connected to the seat for any loose connections, broken wires, or damage. This often requires removing parts of the seat trim.
* Switch Problem: The control switch itself might be faulty. Try cleaning it with contact cleaner. If that doesn't work, the switch will need replacing.
* Motor Problem: The electric motor that moves the seat might be faulty. This often requires professional diagnosis and replacement of the motor or potentially the entire seat adjustment mechanism.
* Power Supply Problem: The problem could be further back in the electrical system, such as a faulty relay or even a problem with the car's battery or alternator.
* Internal Mechanism: The internal gearing or rails could be jammed with debris or worn out. Disassembly might be required to clean or repair.
3. Seeking Professional Help:
If you're not comfortable with car repairs, it's best to take your Mondeo to a qualified mechanic or an auto electrician. Diagnosing and repairing electrical problems or complex mechanical issues in car seats can be challenging.
Before you start any repairs:
* Disconnect the battery's negative terminal to prevent accidental shorts.
* Consult your owner's manual for specific diagrams and instructions relating to your Mondeo's year and model. This is crucial for identifying fuses and understanding the seat adjustment mechanism.
Remember to specify the year and model of your Ford Mondeo for more specific advice. The complexity of the seat adjustment system varies significantly between models.
