The 56 is single element 57 dual. There are and interchangeable dual element #s .I believe one element is brighter than the 3057 and a HD versions that have a support pin in middle of element. Anyway have you tried to flip the bayonet of bulb over . Not knowing your tail lights there may be mixed bulbs 56 & 57 , two wire socket is single element , three dual 3057.
__________________
95 Monaco Crown Royale
M11 400hp, 4060 trans.
Aquahot, Generac Guardian7.5k
|