To troubleshoot, you'll need to consult your owner's manual's fuse box diagram. The DeVille likely has multiple fuse boxes: one under the hood and one inside the car, often located in the dashboard or under the steering column.
The fuses to check (these may vary slightly; your owner's manual is crucial):
* Power Seats (if listed explicitly): Look for a fuse labeled "Power Seats," "Seats," or something similar.
* Accessory Fuses: Power seats often draw power through the accessory circuit. Check the fuses related to accessories, power windows, or general power distribution.
* Ignition Fuses: Some aspects of seat operation might be tied to the ignition circuit.
Procedure:
1. Consult your owner's manual: This is the most important step. The diagram will show you the fuse box layouts and what each fuse controls.
2. Identify the fuse boxes: Locate both fuse boxes in your DeVille.
3. Check fuses systematically: Start with any fuses explicitly mentioned as related to seats or accessories. Visually inspect each fuse for a blown filament (a broken wire or blackened appearance).
4. Test fuses (if necessary): If you have a multimeter, test each fuse to confirm its continuity (whether it's allowing current to pass through).
5. Check relays (if applicable): After checking the fuses, if the problem persists, you might need to check any relays associated with power seats (again, consult the owner's manual).
Important Note: Before working with any electrical components, disconnect the negative terminal of your battery to prevent accidental short circuits. If you're uncomfortable working with car electrical systems, take it to a qualified mechanic. Incorrectly diagnosing and replacing fuses can lead to further damage.
