
Overview
Replacement 3156 or 3157 sockets accept 16-mm wedge base bulbs. Socket fits single-contact 3156 bulbs or dual-contact dual-filament 3157 bulbs. Durable construction with 6” power wires. Price per socket.

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3157 socket will not fit Ford brake/tail mount
I ordered 3157 and 3156 sockets for my Ford tail lights. The sockets are same mechanically with two mounting tabs and the 3157 has a additional wire for the tail light. The problem is that Ford uses three mounting tabs on there brake/tail light bulb sockets and two mounting tabs on single backup/brake only bulb sockets. Also be aware that the ground wire is the RED WIRE ( 50 years in electronics and this is a first for me) Check your sockets before you order replacement. The 3156 fit perfect for backup lights