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Old 01-10-2013, 01:35 PM
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jax32 jax32 is offline
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1157 bulbs

Can someone explain to me how a dual contact bulb, such as an 1157, works? I understand the brass base is ground and the two contacts are switched hot, at least I think that's true based on my limited knowledge. When I check continuity between one of the two contacts and the brass base, it reads an open circuit. When I check continuity between the two contact points, I get a closed circuit reading. Neither reading makes sense to me.
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