* Under the hood in the fuse box: This is the most common location. The fuse box is often located near the battery. Look for a diagram on the inside of the fuse box lid to identify the AC relay. It might be labeled as "A/C," "AC Compressor," or something similar.
* Inside the passenger compartment fuse box (rare): While less common, some Rangers might have the AC relay located inside the fuse box within the cabin, usually under the dashboard. Again, check the fuse box lid for a diagram.
To find it definitively:
1. Consult your owner's manual: This is the best resource. The manual will have a diagram of the fuse and relay boxes, clearly indicating the location of each component.
2. Search online forums: Websites like Ford-trucks.com or Ranger-forums.com often have threads discussing this topic for specific Ranger years and models. Search for "1999 Ford Ranger AC relay location" along with your specific trim level (e.g., XLT, XL).
Important Note: Before working on any electrical components, disconnect the negative terminal of your battery to prevent accidental short circuits. If you're unsure about working with electrical systems, take your truck to a qualified mechanic.