Author Topic: Walthers HO F7A rear light function  (Read 280 times)

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woodone

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Walthers HO F7A rear light function
« on: September 23, 2019, 07:34:22 PM »
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Hi, I have an Walthers F7A unit that has an Tsunami Sound decoder has a factory install in it.
I want to add two red lights on the front of the loco. Come on when traveling in reverse.
Thought that would be simple- NOT SO! There is no yellow control wire or connection on the board?
There is a socket on the board that is not being used ( marked Bl ) but it is not for a rear light best I can tell.
Any thought has how to get these red lights to come on in reverse?
Maybe a bridge on the motor out puts?
Walthers product # 920-40694.   F7A  #4972

woodone

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Re: Walthers HO F7A rear light function
« Reply #1 on: September 24, 2019, 02:15:44 PM »
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38 reads but no thoughts on how to do this?
Hope someone has some input.

peteski

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Re: Walthers HO F7A rear light function
« Reply #2 on: September 24, 2019, 04:15:25 PM »
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38 reads but no thoughts on how to do this?
Hope someone has some input.

Well, since you are getting antsy, I have no idea.  :)  Besides, it is H0.  :trollface: But I would imagine that the Tsunamil decoder was in fact designed with more than just front headlight output on it.  You couldn't find any documentation about this decoder online (at Soundtraxx)?
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woodone

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Re: Walthers HO F7A rear light function
« Reply #3 on: September 29, 2019, 09:31:55 AM »
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I was never able to find a reverse light function output on the OEM’s board.
The locomotive did not have or use a rear light, so the maker of the decoder (Soundtraxx) made the decoder to the speck the OEM asked for. I would guess it saved some $?
So to get a rear light function I will add a function only decoder to operate the red lights I want.