hey guys im not sure what it going on, my reverse lights worked when i did the A4 to M6 conversion in febuary and about 2 months ago my reverse lights stopped working and the bulbs look to be ok, what should i check to see what the deal is, fuses, wires, i have a mulitmeter i can use, but how would i do that,like this? turn the car to ON put it in reverse where the lights would come on then put the positive on the contact in the bulb connector then put the negative on the body to ground it out?