Farm Equipment - Battery drain

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Battery drain

Printed From: Unofficial Allis
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=52358
Printed Date: 12 Sep 2025 at 4:14pm
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Topic: Battery drain

Posted By: steigerbro24
Subject: Battery drain
Date Posted: 19 Jun 2012 at 6:54pm

Is it normal for a battery to drain when the switch is on. My B is doin this, but its not as bad as when I had a bad regulator but I dont want someone to flip the switch and drain the battery while its at the fair or a show?

Thanks Peter

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5 Steigers, 7 John Deeres, 8 Internationals, 4 Case tractors and combines and 1 Oliver
........... Oh wait they're all 1/64.......and a real '44 B

Replies:

Posted By: CTuckerNWIL
Date Posted: 19 Jun 2012 at 6:59pm

Depends on what ignition system you have. If it's a magneto, all the switch does is ground the mag so it won't fire. If it's a coil and distributor ignition, leaving the switch on will not only draw the battery down but also burn up your points so it won't run worth a crap if at all.

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

Posted By: Steve in NJ
Date Posted: 21 Jun 2012 at 7:16am

Depends on what switch yer' talkin' about and what Ignition system you have. If its the Ignition switch you're referring to, absolutely. With the switch on, you're powering up the Ignition circuit if its a Distributor fired Tractor. The Battery will eventually drain. As Tuck mentioned, if its a Mag, the Mag is grounded and won't start if the switch is left ON.

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