I have a 03 Tahoe Z71 with now 191K and runs good. Vehicle is used for K-9 and rear seats are now insert for K-9. Removed door panels and plugged in window switches and for awhile windows worked. Then one day nothing. Checked and motors work but not getting power to window motors when trying front or rear switch. Tried front master switch and that didn't help. Switches are behind metal door covering and not exposed to K-9. Any help be appreciated.