The installation is for HO-Scale Fleischmann 4171 BR03 Steam locomotive. It uses T1 decoder and was performed by Ric Bogart of Osborne Park  W A,  Australia 

Important Soldering Tip:
Please do not use any flux either liquid or paste on the mother board. It will damage it. Use only Rosin core solder approved for electronics use.
We recommend to use only Kester "44" rosin core, SN63PB37, .015" diameter, part number 24-6337-0007.
This can be ordered from Techni-Tool under Techni-Tool part number 488SO157

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

Other solder tips: 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

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