Farm Equipment - Another 12v conversion question

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Another 12v conversion question

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Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=117402
Printed Date: 13 Sep 2025 at 4:35pm
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Topic: Another 12v conversion question

Posted By: skeeters65
Subject: Another 12v conversion question
Date Posted: 11 Jan 2016 at 8:08pm

If I convert to 12v can I convert all 3 lights on my B or do I need to buy complete new light assembly's?
Thanks

Replies:

Posted By: Unit3
Date Posted: 11 Jan 2016 at 8:16pm

Yes you can. 1156 bulbs in front. You might get by with that in the rear. I have done it to our WD45's and "C", but the "C" doesn't have the factory rear light. I forget the size bulb in the WD45 taillights.

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2-8070FWA PS/8050PS/7080/7045PS/200/D15-II/2-WD45/WD/3-WC/UC/C

Posted By: Steve in NJ
Date Posted: 11 Jan 2016 at 8:26pm

Unit 3 is correct. You're probably better using a 199 bulb which has a heavier filiment for vibration being your B has no suspension. The bullet light bulb in 12V would be a T90 or the little higher CP T97. HTH
Steve@B&B

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39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife

Posted By: skeeters65
Date Posted: 11 Jan 2016 at 8:26pm

Is there just a grommet on the back of the light to put new wiring in? Or is it just a bulb swap???

Being lazy and don't want to run out to the garage.

Thanks

Posted By: Dakota Dave
Date Posted: 11 Jan 2016 at 8:55pm

They are bayonet base bulbs. You just push and twist to remove the bulb. Put the new one in push down and twist till it locks in place.

Posted By: DanC911
Date Posted: 11 Jan 2016 at 9:15pm

I changed the bulb in the rear of my B to LED. I was able to find a red one in 6 volt on Superbrightleds.com.

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1950 WD, 1955 B, 66 Jacobsen Chief-O-Matic, 68 Simplicity 2110, 77 IH Cub Cadet 1450 w/front loader

Posted By: Sugarmaker
Date Posted: 12 Jan 2016 at 8:49am

skeeters65 wrote:

Being lazy and don't want to run out to the garage.

Thanks

Lot of that going on right here today!
Regards,
Chris

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D17 1958 (NFE), WD45 1954 (NFE), WD 1952 (NFE), WD 1950 (WFE), Allis F-40 forklift, Allis CA, Allis D14, Ford Jubilee, Many IH Cub Cadets, 32 Ford Dump, 65 Comet.

Posted By: CTuckerNWIL
Date Posted: 12 Jan 2016 at 9:11am

skeeters65 wrote:

Is there just a grommet on the back of the light to put new wiring in? Or is it just a bulb swap???

Being lazy and don't want to run out to the garage.

Thanks

Steve has replacement wires for the lights. Once the bulb is out, you can snip the old wire off in the back and pull it out by the little "bead" on the inside. Slide the new piece in and solder to your wiring.

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Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF