Isuzu Repair: 99 Isuzu Trooper power window failure, isuzu trooper, control switch

Question
All four windows affected. Replaced the relay and that didn't help. Any idea where to start? (besides just running to the dealership). Thanks for any help you can provide.

Answer
Well all four windows would be some type of fuseable link or relay Kirk. The actual main control switch coould be bad or the lock-out switch could be shorted causing all four windows to be locked. If that didn't help though let me know and we will go from here.