There are a nest of relays behind the glove box. [The white one is the overdrive relay I believe]. Access is by removing the interior of the glove box unless you have a Pixie at your disposal. But there are other locatins for relays. I looked at the fcpgroton.com website diagram of relays and it isn't numbered in the diagram but they have it listed as part 1235893. Here is where I can't help: I don't know which relay is which. Hopefully someone else does and will repsond. If you are in a hurry, you can pull one out at a time and by process of elimination figure out [before starting the car] when your windows won't work. With a high degree of certainty I can say a relay is not designed to be repaired although I am amazed at what contributors to this forum can do. New ones are in the mid $40.00's so the pnp may offer a cheaper alternative.