The installation is for HO-Scale Fleischmann 4171 BR03 Steam locomotive. It uses a T1 decoder and was performed by Ric Bogart of Osborne Park WA, Australia.
Disassemble the loco (as per the operating instructions for the service of the unit). Lift the locomotive casing and remove. I disassembled the loco to feed a new wire for the front headlight (running the existing lamps on half wave power) then reassembled and went to work on the tender. There is also a link that needs to be cut, RF choke to be removed and rear light wires to be removed (see picture) to isolate the motor from the pickup wires and wires to be moved to different points. Following the decoders instructions the red wire -----to the right side rail pickup (Fleischmann's brown)
orange wire ---- to the motor replacing the original brown wire
black wire ---- to the left side rail pickup
grey wire ---- to the motor replacing the black wire
white to the forward headlight
----- yellow to the rear headlight
Please do not use any flux either liquid or paste on the mother board. Over time, the acidic properties of liquid or paste flux will begin eating away at the fiberglass PCB and will damage it. Use only Rosin-core solder or no-clean flux approved for electronics use.
TCS recommends the use of Kester "44" Sn63 Pb37, .015" diameter Rosin-core solder. Kester part number 24-6337-0007.
When stripping wire, only strip a tiny little bit of the insulation. Strip no more then a 1/64 of an inch. When the wire gets tinned with solder, the insulation will shrink back more. Try to not expose any more wire then half the length of the solder pad at most. In no case should solder or exposed wire wire ever be outside the boundary of the the solder pad you are attaching a wire to.
Click here for important information on properly Stripping and Tinning wire