To find it, you should:
1. Locate the underhood fuse box: This is usually a large black plastic box under the hood, often near the battery. The cover should have a diagram showing the fuse and relay positions.
2. Consult the owner's manual: Your owner's manual should have a fuse and relay diagram specific to your vehicle. This is the best starting point.
3. Check the fuse box diagram: The diagram on the fuse box cover will usually identify the washer motor relay. Look for terms like "windshield washer," "washer pump," or similar. The relay itself might be labeled, though the labeling can sometimes be faded or difficult to read.
4. Use a multimeter (optional): If you can't locate it visually, you can use a multimeter to test the circuits related to the washer motor. This requires some electrical knowledge and is not recommended unless you are comfortable working with car electrical systems.
If you can't find it after these steps, it's best to consult a Ford repair manual specific to your 1999 Explorer year and model or seek assistance from a qualified mechanic. They will have the resources and expertise to pinpoint the relay's location quickly.
