Farm Equipment - Wd 45 charging system issue

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Wd 45 charging system issue

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=164682
Printed Date: 06 Jun 2025 at 5:22pm
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Topic: Wd 45 charging system issue

Posted By: Colt1986
Subject: Wd 45 charging system issue
Date Posted: 29 Sep 2019 at 11:54am

I just completely rebuilt my 1955 wd 45.new wiring harness new light switch(second one).I wired everything per instructions from the wire harness kit I got from brillman for 6 volt positive ground system.I had my generator rebuilt and a new cutout put on.The resistor in the switch glows cherry red and I can't get the system to charge I don't know what I am doing wrong any help on this issue would be greatly appreciated.I redid the grounds to the dash panel thinking that might have something to do with it or the cheap light switch I had used I replaced the switch with a cole and hersee and it still continues to do the same thing I'm clueless

Replies:

Posted By: acd17toy
Date Posted: 29 Sep 2019 at 6:14pm

The brillman wiring instructions may be wrong, fallow the diagram in your owners manual.

Posted By: DanD
Date Posted: 29 Sep 2019 at 6:56pm

Is the F terminal on the generator connected to the switch?

Posted By: BigGuy1000
Date Posted: 29 Sep 2019 at 9:44pm

IF you have the right switch this is the correct wiring:

http://dueyschutter.freeservers.com/cgi-bin/i/images/1_wiring_wd-_wd45_6_volt.jpg" rel="nofollow - http://dueyschutter.freeservers.com/cgi-bin/i/images/1_wiring_wd-_wd45_6_volt.jpg

Posted By: Steve in NJ
Date Posted: 30 Sep 2019 at 6:45am

First of all, those aftermarket 3 position switches are junk! If you're going to keep it 6V, put the correct 3 position switch in it. The correct one is the round Delco with fuse tower. Those aftermarkets cause many people headaches and burn up new wiring harnesses. (including my own harnesses) I have no idea what Brillman's wiring instructions are, but I would go by a service manual or I can send you in the mail one of my color coded wiring diagrams to use. We have the correct OEM Delco 3 position switch in stock rebuilt ready to go if interested. Double check your wiring. Also, make sure your Ammeter is good. I've seen faulty Ammeters cause these problems also...

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: MACK
Date Posted: 30 Sep 2019 at 8:13am

Agree with Steve, have saw Amp gauge burn into inside. Current has to travel through Amp gauge. MACK