TRACTOR PARTS Allis Chalmers Case & David Brown Farmall & International Ferguson Ford & New Holland John Deere Massey Ferguson Massey Harris Minneapolis Moline Oliver & Cockshutt Kubota / Yanmar

TRACTOR MANUALS

Allis Chalmers	Case	Farmall IH	Ford 8N,9N,2N	Ford
Ferguson	John Deere	Massey Ferguson	Minn. Moline	Oliver

Discussion Forum

D15 ignition switch

Welcome Guest, Log in or Register

Author

Flat47

04-19-2008 12:47:00

Report to Moderator

Looking for some help with this one:

I've got a '61 D15 gas that has been converted to 12v neg ground and a Delco 10si alternator added. Starts great but won't shut down when the key is turned to "off." Comparing the wiring to diagrams on this site, the wiring looks right to me, but obviously something isn't right.

Any help would be great.

T

[Log in to Reply] [No Email]

Flat47

04-21-2008 03:28:54

Report to Moderator

Re: D15 ignition switch in reply to Flat47, 04-19-2008 12:47:00

Texas Denny - Thanks for the input. I went to Radio Shack yesterday to get the diode and they were all out...so this project will be delayed a bit.

[Log in to Reply] [No Email]

Flat47

04-20-2008 03:45:43

Report to Moderator

Re: D15 ignition switch in reply to JLM/Minn, 04-19-2008 12:47:00

Thanks, guys.

There are three connections on the back of the switch: battery, solenoid, and coil. This appears to be the original switch.

I'll try the diode and see what happens.

Thanks again,

T

[Log in to Reply] [No Email]

Texas Denny

04-20-2008 06:07:00

Report to Moderator

Re: D15 ignition switch in reply to Flat47, 04-20-2008 03:45:43

I think you will need one of my three earlier suggestions. The diode is trouble free. It has polarity so it must be installed the correct way. If you install it wrong, the alternator won't work. There is no damage. Hook it up the other way and it should work fine.

There is a possibility that the solenoid connection would work but it is doubtful. Usually when the switch is turned from start to run, the alternator is not spinning fast enough to start.

I have a Ford 901 that I put the normally open switch on. It works fine but sometimes I forget to push it. And occasionally when I idle it down too slow, the alternator drops out. I like the diode option the best.

[Log in to Reply] [No Email]

chalmersbob

04-19-2008 19:37:33

Report to Moderator

Re: D15 ignition switch in reply to Flat47, 04-19-2008 12:47:00

your ignition switch is a simple off - on switch. It breaks the current going from the battery to the coil. If turning ot switch off doesn't stop the tractor, then you have something connected wrong and power is bypassing the switch. diodes are not needed if wired correctly. Bob

[Log in to Reply] [No Email]

Texas Denny

04-19-2008 19:57:19

Report to Moderator

Re: D15 ignition switch in reply to chalmersbob, 04-19-2008 19:37:33

I should have said typical ignition switch. I do not know the number of poles on an original D-15 ignition switch. It may have a separate terminal for the alternator. My D-17 does but the D-14 doesn't.

[Log in to Reply] [No Email]

Texas Denny

04-19-2008 19:52:39

Report to Moderator

Re: D15 ignition switch in reply to chalmersbob, 04-19-2008 19:37:33

The standard ignition switch is a two pole switch. If you have a four pole switch which switches the field to the alternator separately from the ignition, you can avoid the second switch or the diode.

[Log in to Reply] [No Email]

Texas Denny

04-19-2008 15:18:50

Report to Moderator

Re: D15 ignition switch in reply to Flat47, 04-19-2008 12:47:00

The alternator needs voltage to get started. Once it has been energized it feeds voltage backwards when you turn off the ignition on that energize wire. To correct the problem, put a diode in that line. The diode will let current flow to the alternator to get started but won't let it come back toward the ignition switch to keep it running.

Another alternative is to put a push button switch in the line which is normally open. Push it once after starting the tractor, and the alternator is good. If you put a normally closed switch in the line, push it after turning off the ignition , hold until the engine is stopped and then release. The push buttons serve the same purpose as the diode - provide energizing voltage and current and a way to prevent reverse flow.

[Log in to Reply] [No Email]

[Options] [Printer Friendly] [Posting Help] [Return to Forum] [Log in to Reply]

TRACTOR PARTS	TRACTOR MANUALS

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home | Forums

Copyright © 1997-2023 Yesterday's Tractor Co.
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy