Is there a fuse for power steering assist on grand marquis?

There isn't a single, dedicated fuse solely for the power steering assist on a Ford Grand Marquis. The power steering system gets its power from the battery, through a circuit protected by several fuses and the main power distribution box. A problem with the power steering could be caused by a blown fuse elsewhere in the system, a faulty power steering pump, or a problem with the power steering control module.

To troubleshoot power steering problems, you should:

1. Check the owner's manual: Your owner's manual will have a fuse box diagram showing all the fuses and what circuits they protect. Look for fuses related to the ignition system, power distribution, or potentially the power steering pump (although unlikely to be a direct fuse).

2. Check multiple fuses: Don't just check one or two; carefully inspect all fuses in both fuse boxes (usually one under the hood and one inside the car, often under the dashboard). Look for blown or damaged fuses.

3. Have it diagnosed professionally: If you can't find a blown fuse, a mechanic with a diagnostic scanner can check for electrical problems within the power steering system. The problem could be more complex than a simple blown fuse.

In short, while there isn't a "power steering fuse," related fuses *could* cause a power steering issue. A systematic check of all fuses and a professional diagnosis are recommended if the power steering is malfunctioning.