12V or 6V bulb

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Wavy

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Topic: 12V or 6V bulb
Posted: 15 July 2013 at 1:48pm

Just bought a M416 and I am wanting to change the bulbs from 24V to to 12V or 6V (I have a few other toys) The stop light bulb is a double filament with a single contact on the base which bulbs are interchangeable for that.I I can correct the mounting pin issue if they are offset.

Thanks

Do it now, think later!

1945 CJ2A

1947 CJ
1974 CJ5
1999 Commanche P/U

Rus Curtis View Drop Down

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Posted: 16 July 2013 at 3:22am

A double filament should have two contacts on the bottom (one for each filament - since each is a separate circuit). Another give away is that double filament bulbs have offset bayonets (lock tabs). A single filament will have the bayonets even. I believe those lights have multiple bulbs in them to cover all the functions.

If you can read a number on the casing (or sometimes on the glass) you can easily cross reference a bulb for different voltage.

Rus Curtis
Alabama
1954 CJ3B
Bantam T3-C

Wavy

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Posted: 16 July 2013 at 6:36pm

This one has a double filament with a single contact on the back, Book calls for a 1683 24V. The pins are straight across form each other. I can remove the one pin on a regular bulb to make it work but the single contact in the socket will not work with a 2 contact bulb. This is the stop light so it needs to be brighter than the tailight .

Do it now, think later!

1945 CJ2A

1947 CJ
1974 CJ5
1999 Commanche P/U

Rus Curtis View Drop Down

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Posted: 16 July 2013 at 9:43pm

Wavy,

Taking your provided number, I looked the bulb up. I'll have to say I've never seen a bulb like this. I don't know if the military wanted a brighter bulb or built in redundancy. Have you powered the bulb outside the housing to see if both filaments light together?

The base of your bulb is the same as the base of a #1156. That single contact base is called a BA15s. I cross referenced several sights and all showed the 1156 as a 12V version of the 1683. One sight that listed both bulbs, imperialsupplies.com, showed both to have 32 candlepower. Since those #1156 bulbs are readily available, I suggest trying one out to see if it's bright enough to use.

A side by side bench test would be fun if you had access to a 24V power source.

Edited by Rus Curtis - 16 July 2013 at 9:49pm

Rus Curtis
Alabama
1954 CJ3B
Bantam T3-C

Wavy

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Posted: 16 July 2013 at 11:06pm

Both filaments burned but being 24v it will not burn bright on 12v and worse on 6v, I guess I will try a 1156, the tail light is a separate bulb (about eqivilant to a 93 12v.) Just want a brighter bulb for the Stop light.

Do it now, think later!

1945 CJ2A

1947 CJ
1974 CJ5
1999 Commanche P/U

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
Wavy Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 30 Nov. 2006 Location: St Louis, Missouri Status: Offline Points: 103	Post Options Post Reply Quote Wavy Report Post Thanks(0) Quote Reply Topic: 12V or 6V bulb Posted: 15 July 2013 at 1:48pm
	Just bought a M416 and I am wanting to change the bulbs from 24V to to 12V or 6V (I have a few other toys) The stop light bulb is a double filament with a single contact on the base which bulbs are interchangeable for that.I I can correct the mounting pin issue if they are offset. Thanks
	Do it now, think later! 1945 CJ2A 1947 CJ 1974 CJ5 1999 Commanche P/U

Rus Curtis Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 25 Mar. 2010 Location: Alabama Status: Offline Points: 1733	Post Options Post Reply Quote Rus Curtis Report Post Thanks(0) Quote Reply Posted: 16 July 2013 at 3:22am
	A double filament should have two contacts on the bottom (one for each filament - since each is a separate circuit). Another give away is that double filament bulbs have offset bayonets (lock tabs). A single filament will have the bayonets even. I believe those lights have multiple bulbs in them to cover all the functions. If you can read a number on the casing (or sometimes on the glass) you can easily cross reference a bulb for different voltage.
	Rus Curtis Alabama 1954 CJ3B Bantam T3-C

Wavy Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 30 Nov. 2006 Location: St Louis, Missouri Status: Offline Points: 103	Post Options Post Reply Quote Wavy Report Post Thanks(0) Quote Reply Posted: 16 July 2013 at 6:36pm
	This one has a double filament with a single contact on the back, Book calls for a 1683 24V. The pins are straight across form each other. I can remove the one pin on a regular bulb to make it work but the single contact in the socket will not work with a 2 contact bulb. This is the stop light so it needs to be brighter than the tailight .
	Do it now, think later! 1945 CJ2A 1947 CJ 1974 CJ5 1999 Commanche P/U

Rus Curtis Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 25 Mar. 2010 Location: Alabama Status: Offline Points: 1733	Post Options Post Reply Quote Rus Curtis Report Post Thanks(0) Quote Reply Posted: 16 July 2013 at 9:43pm
	Wavy, Taking your provided number, I looked the bulb up. I'll have to say I've never seen a bulb like this. I don't know if the military wanted a brighter bulb or built in redundancy. Have you powered the bulb outside the housing to see if both filaments light together? The base of your bulb is the same as the base of a #1156. That single contact base is called a BA15s. I cross referenced several sights and all showed the 1156 as a 12V version of the 1683. One sight that listed both bulbs, imperialsupplies.com, showed both to have 32 candlepower. Since those #1156 bulbs are readily available, I suggest trying one out to see if it's bright enough to use. A side by side bench test would be fun if you had access to a 24V power source. Edited by Rus Curtis - 16 July 2013 at 9:49pm
	Rus Curtis Alabama 1954 CJ3B Bantam T3-C

Wavy Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 30 Nov. 2006 Location: St Louis, Missouri Status: Offline Points: 103	Post Options Post Reply Quote Wavy Report Post Thanks(0) Quote Reply Posted: 16 July 2013 at 11:06pm
	Both filaments burned but being 24v it will not burn bright on 12v and worse on 6v, I guess I will try a 1156, the tail light is a separate bulb (about eqivilant to a 93 12v.) Just want a brighter bulb for the Stop light.
	Do it now, think later! 1945 CJ2A 1947 CJ 1974 CJ5 1999 Commanche P/U