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| | |-+  Wiring codes on Bachmann boards: (R, M+, L-, B+, L+, B-, M-, L)
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Author Topic: Wiring codes on Bachmann boards: (R, M+, L-, B+, L+, B-, M-, L)  (Read 1881 times)
Grapevine Flyer

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« on: June 30, 2016, 03:56:15 PM »

I'm trying to identify what all the wires are that lead to Bachmann boards. Where the wires come in, you'll see letters like: R, M+, L-, B+, L+, B-, M-, L.  I'd like to know what those all mean. Some of them I know:

R:    Right Rail
L:    Left Rail
M+: Motor positive
M-:  Motor negative
L+:  Light positive
L-:   Light negative

I have found L+/- can be used to designate any light, and doesn't sometimes distinguish between front or rear.

What does B+ and B- stand for?
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Flare

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« Reply #1 on: June 30, 2016, 06:39:18 PM »

The boards are marked differently depending on which model you have.

Which locomotive are you working on?
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Grapevine Flyer

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« Reply #2 on: June 30, 2016, 06:57:39 PM »

I've got a number of different steam tenders. I was trying to identify the naming pattern (so I can swap out boards as desired).
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Len

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« Reply #3 on: July 02, 2016, 08:13:05 AM »

The board connections are:

R:    Right Rail
L:    Left Rail
M+: Motor Brush Connected to Right Rail
M-:  Motor Brush Connected to Left Rail
L+:  Light Positive
L-:   Light Negative
B+: Battery Positive*
B-: Battery Negative*

*Some boards allow the addition of a reed switch On/Off controlled battery pack for operation, rather than using track power.

Len
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If at first you don't succeed, throw it in the spare parts box.
Grapevine Flyer

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« Reply #4 on: July 02, 2016, 12:43:38 PM »

Thank you very much
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