Where is the fuse for a ac compressor on 1998 Ford Mustang?

The AC compressor on a 1998 Ford Mustang doesn't have a dedicated fuse in the traditional sense. Instead, the compressor is controlled by a relay and is protected by the circuit breaker in the Power Distribution Box (PDB), often referred to as the fuse box under the hood. There's no single fuse that will stop the compressor from working. A problem is more likely to be a faulty relay, a low refrigerant charge, a faulty compressor clutch, or a problem within the AC system's electrical circuitry.

To diagnose a non-working AC compressor, you should:

1. Check the AC compressor relay: Locate the AC relay in the underhood fuse box (PDB). The location and specifics will vary slightly depending on the exact trim level of your Mustang. Consult your owner's manual for the relay location diagram. You can try swapping the relay with a similar-looking one (make sure to note which one you moved) to see if the compressor engages.

2. Check the low-pressure switch: This switch prevents the compressor from turning on if the refrigerant pressure is too low, protecting the compressor from damage. A faulty switch can prevent the compressor from running even if everything else is fine. This is a common cause.

3. Check the AC system's electrical wiring and connections: Look for loose, corroded, or damaged wiring in the system.

4. Have your AC system professionally diagnosed: If you're not comfortable working with automotive electrical systems or AC refrigerant, take your car to a qualified mechanic or AC specialist. They have the tools and expertise to properly diagnose and repair your AC system. They can properly identify if the issue is a component failure, a refrigerant problem, or a more complex electrical fault.

In short: Don't waste time looking for a specific "AC compressor fuse." Focus your search on the relay and other components of the AC system's electrical controls.