Fitting Decoders for directional lighting to a 00 gauge Bachmann....

dude2112

dude2112

Registered
Hi to all. :-\
Sorry if I am wrong in asking this question on this G-Scale forum but I need help.

I am chipping a Bachmann no 32-463 class 170/4 three car unit for a friend of mine, I have done the drive unit in the middle but do not know how to do the directional lighting in the end units.....

He has provided 2 DCC Concepts 8 pin decoders but I am unsure which wires to use..... :P

Any help would be great....
Cheers Andy.
 
Are they lighting function decoders or standard loco decoders? I've never used a lighting function decoder but I'd assume they still use the standard NMRA wire colours.

On a loco decoder the lighting standard wire colours are white for front light, yellow for rear light and the blue is the common positive. Power from track to decoder would be via the red and black wires.
 
:D YOU are a star.... O0
They are standard decoders, I did ask this same question on BRMweb a week ago but got no help..... :(
So glad I switched ta G-Scale....... :D

I did have an idea of the lighting wires but was not sure of how the pick-ups would supply the chip enough..... ::)

Thanks again Andy
 
You're welcome. Forgot to add, for the power pickup the red wire should be to the right hand wheels. This is the standard for just about all scales except G! "Red is right" should make direction of travel and the front and rear lights correct under analogue DC.
nem652-nmra-8-pin-wiring.jpeg
 
Hi Nick, thanks for your help so far......
I have done the wiring as stated ( I think ) but can only get either the headlights or red lights working in forward travel on the controller ::) , they do not switch over. Do I have to connect the white and yellow wires together to get the lights to switch over ?

Cheers Andy.
 
You need front head AND rear red lights to 'forward' light power, and rear white AND front red to 'rear' light feeds..
'Front' and 'Rear' refer to direction of travel, a little confusing.

But you probably know this anyway
 
Thanks PhilP,
I know what I want to achieve, just as you say. The problem I have is how to hardwire this in to the non-motorised end units..... ???

Now I know why I switched ta G. Sadly I have only been given Hornby select to test this train so limited on functions.
 
It depends which unit you consider to be the "front". As Phil says, at that end you wire the headlight to white and the tail light to yellow. For the other end you wire headlight to yellow and tail light to white. (either that or you set the direction as reversed in the decoder in the rear unit, but to be honest it's easier to swap the wiring).
 
Ah, have been back to the beginning of the thread..
So really the problem is how to fit the decoder / lights in each end unit?
Have not had the (doubtful) pleasure of trying to fettle a N guage .. Luck!
 
Does this help?  I`ve not shown any resistors you may need for LED lights.  Orange and grey motor connections you`ll need to get the right way round by trial and error, but you say you`ve already done that bit.
dcc wiring_a.jpg
 
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