i have wiring diagrams from chiltons and autozone but nether show these gauges or their sending units. both stopped at the same time. i tried a search in archives and found nothing on 4th generation. one thread for 3rd gen stated a pink wire feeds both gauges and the back up lights and my back ups dont work either but not sure when they quit. can anyone point me in the right direction? checked fuses and swapped relays but w/out knowing where power comes from i am lost. thanks