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Old 09-01-2016, 09:41 PM   #1
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Strange light bulb problem

So I have an older 94 Winnebago 32 Adventurer. A light bulb went out in the small lights over the bed, when I pulled it, it was an 1156. No problem I thought there are ten billion of these on the planet - or so I thought. So the contemporary 1156 is a single contact but my older bulb is a double contact, none of which I can find anywhere. What happened, were do I get one?
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Old 09-01-2016, 10:19 PM   #2
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Take the old bulb to NAPA. They've matched bulbs for me I thought were going to be harder than hens teeth to locate. They've yet to let me down. Once you've located the errant bulb buy enough to replace any and all you have in your coach. Then add extras to cover you in the future.
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Old 09-02-2016, 12:19 AM   #3
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Check boat/marine supply. Double contact 12 volt bulbs are common in that application.
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Old 09-02-2016, 12:58 AM   #4
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https://www.amazon.com/Eiko-1156DC-M...ayonet+Base%2C
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Old 09-02-2016, 10:42 AM   #5
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I'll try the marine solution first, quite close to a chandler.
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Old 09-02-2016, 10:51 AM   #6
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I'll try the marine solution first, quite close to a chandler.
It is a 1004. Not hard to find.
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Old 09-02-2016, 10:16 PM   #7
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I will look for the 1004.
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Old 09-06-2016, 06:21 PM   #8
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So I went to my local chandlery and picked up 1004 and they work just fine, thanks for the suggestion. Hope this thread helps others with their older Winnibagos.
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Old 09-07-2016, 12:18 PM   #9
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Now you know why the original bulb failed; it was a single contact bulb in a double contact socket! Although, the double contact socket SHOULD have different depth slots on either side, making it difficult to install a single contact bulb.
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Old 09-07-2016, 09:17 PM   #10
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The original bulb was a two contact jobbie which was why I was surprised to find current ones are single contact. The gal at the RV store was convinced my double contact bulb was mis-labeled.

When I look at LED bulbs, one advert says the new LED replacement works both with the 1004/1156 which I find interesting as the 1004 is two contacts and the 1156 is one contact.
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Old 09-08-2016, 11:44 AM   #11
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Originally Posted by rsn48 View Post
The original bulb was a two contact jobbie which was why I was surprised to find current ones are single contact. The gal at the RV store was convinced my double contact bulb was mis-labeled.

When I look at LED bulbs, one advert says the new LED replacement works both with the 1004/1156 which I find interesting as the 1004 is two contacts and the 1156 is one contact.
You are correct, the 1004 and the 1156 have two different style bases, and are not compatible. Bottom line for you is this; is your socket a dual contact socket (BA15d), or a single contact socket (BA15s)?
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Old 09-08-2016, 10:59 PM   #12
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I bought the 1004 to replace the two contacts 1156 I had (they now only come with one contact). The 1004 is two contacts, the current 1156 is not, only one contact.

I also bought the LED "bulb" to replace my 1156 incandescent bulbs I had in my over head lights, the LED is one contact only.

The advertisement I saw saying their LED would replace both a 1004 and an 1156 was just plain wrong, it can only replace the 1156's. I am quite happy with these LED's, the light is softer at 3000-3500 Kelvin, not as harsh as 4500 - 5000 Kelvin LEDs.
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Old 09-09-2016, 07:09 PM   #13
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1156 is a single post,single filament.
1157 is a double post and filament.

If you have a double post bulb in a light fixture, someone put the wrong bulb in it.

Also the 56 has 2 side posts that are opposed, you can put the bulb in either way. The 57's post are not opposed, one is higher than the other.
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