This installation documentation is an alternate for the Intermountain F3A/B, F7A/B, and F9A/B. This installation uses the IMF4 decoder, and was performed by TCS.
NOTE: This installation should only be used if your model does not include wires from the motor. TCS recommends installing these wires for best results. For an overview of the installation process, click HERE
NOTE: This documentation shows the installation process for the 'A' unit. The installation process is the same for the 'B' unit, with the exception of the headlight wiring.
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