Ed and others, Again, If you use a smaller current rating on the door locks, 10 or 15 amps, the breaker will normally trip faster to keep from burning up the module. I use a 10 amp and my car is still original locks and everything. Don't use a 40 amp. It's just to much for the system to handle. If the relays in the module are burned, Again I can replace them. Also, don't use the inside door lock mechanism. John Hervey http://www.specialtauto.com/