I rewired my 53 ,3100 with a original wiring harness, everything works except these headlight, they are 3 prong plug in lights. They worked before i rewired truck, there is power to the wires?
1950 Chevrolet 3100 (Ol' Roy) 1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1956 Cadillac Sixty Special Fleetwood (The Godfather) | 1966 Oldsmobile Toronado (The Purple Knif) | 1966 Ford Mustang (Little Red) | 1964 Ford Galaxie 500 coupe | 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12 '52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
Gotta have a good ground. Show us what plugs into that bulb connector. Show us the ground. Tell us what and how you checked for "power at the connector". Tell us what connector you checked and how you checked it.
Step 1: Bench check the new light and see if it functions. You can do that with a couple jumper wires and your battery. If the light works, then start at the connector where it plugs in and work your way back from there.