Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 1157 bulbs
Thread: 1157 bulbs
View Single Post
  #1 (permalink)  
Old 01-10-2013, 12:35 PM
jax32's Avatar
jax32 jax32 is offline
Registered User
Last photo:
Join Date: Jan 2012
Location: Phoenix, Arizona
Age: 74
Posts: 30
Wiki Edits: 0

Thanks: 11
Thanked 2 Times in 2 Posts
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.
Reply With Quote