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(888) 312-8812 Login SignupDuring lighting-circuit repairs, the Mack Light Bulb Socket replaces the connection point that holds the bulb and contacts its terminals. The socket is the interface between the bulb base and the vehicle wiring, so matching its contact layout is more important than choosing a lamp by appearance. The Mack 25174871 is the socket component, not a complete exterior lamp or a replacement light bulb. Replacing the socket restores the connection between the bulb base and vehicle wiring while leaving an undamaged lamp housing and lens in place.
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