[aquakiwi]

I just disassemble a second hand Bachman 4-4 to add more realistic firewood and it appears to have a DCC chip, is this correct?

 

[mesenteria]

Bachmann locomotives come with a 'light board' of some kind. They have to be removed, or wired around, when installing decoders. This is either a light board or perhaps an N Scale decoder...but I don't think it's a decoder.

 

[wvgca]

it does seem to be a decoder, can't get a decent magnification to tell whose it is though ...
blue is power for the lights, white and yellow are function negative for the lights ..
jmri would give you a closer idea ..

 

[Cab1]

I think wvgca is right. The color code of the wires gives it away. I converted an older one of these to DCC and it didn't have a light board. The headlight drew power directly from the track through the front wheel set. Light boards are not that complex. They're usually just a thin board with a couple of diodes on it.

 

[traction fan]

Decoder

aquakiwi;

It sure looks like a DCC decoder to me. Have you tried running it on DCC?

Traction Fan :smilie_daumenpos: