1991 Ford Explorer

It is located on the right front fender's relay block. Here is a picture:

You need to check if there is power to the relay and then when you turn the key on, if there is power out. In many cases, you will find another relay in the car with the same part number. Switch them to see if it makes a difference.

Let me know if you have other questions, and thanks for using 2carpros.com.

Joe