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Discussion Boards => Williams by Bachmann => Topic started by: HannahsDad on May 29, 2026, 11:49:26 AM

Title: Can a Williams dual motor loco be wired for always forward
Post by: HannahsDad on May 29, 2026, 11:49:26 AM
I have a shelf layouot (17' x 25'), usually pulling 9-11 passenger cars.  Backing up around 72" curves is possible, but slow and I usually just lock my Lionel locos in forward only (especially the post war stuff).  I don't think any of my older Williams locos can do that.  The manual says that after a power loss, you have to wait 7+ seconds, then it will return to forward-neutral-reverse operation.  Any sooner than that, and it will interpret that as a marker to switch to neutral then reverse, etc.

So, is there a wiring way to bypass the electronic e-unit and just run the motors forward only?  Anybody done this?  And if so, anybody have a wiring diagram to share?  My email is [email protected] if someone has a wiring diagram for this.

Thanks!

Scott W.
Allen, TX
Title: Re: Can a Williams dual motor loco be wired for always forward
Post by: Len on May 29, 2026, 06:51:12 PM
There are basically two options:

1. Replace the reverse board with the new style that has a direction lock switch:

https://estore.bachmanntrains.com/index.php?main_page=product_info&cPath=77_222&products_id=10587

Instructions: https://www.bachmanntrains.com/home-usa/dwg/dwgs/WilliamsReverseBoardInst(later).pdf

2. Replace the reverse board with a 50V, or higher, full wave rectifier:

Connect the pickup roller to one unmarked terminal, connect the chassis to the other. The motors connect to the +/- terminals whichever way gives you forward travel.

There used to be instructins around on how to modify the original reverse boards to add a direction lock switch, but they have pretty much disappeared. Which is probably a good thing, because the risk of damaging the board while soldering was fairly high.

Len