This installation is for a HO-Scale Intermountain ES44DC using a TCS WOW121-Diesel decoder, IB-MB2 with Keep-Alive™
and 28mm WOWSpeaker by TCS.

This was performed by our friends from DCC Xpress installations.
They offer high quality WOWSound installations for a flat rate complete with free return shipping!
You can find them at:

These items are available in the WDK-INT-2 which was used for this installation.
IB-MB2 Motherboard with Keep Alive™ WOW121-Diesel Decoder JST Speaker Harness INT-SH2 Speaker Kit
Click here for more information on the WDK-INT-2 and the rest of the WOWDiesel Kits line.

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

HO-Scale Intermountain ES44DC prior to installation.


To remove the shell, we must first remove the front and rear couplers screws as highlighted in red above, the couplers and their housings.

With the couplers and their housings removed, the shell can be lifted up and off of the locomotives chassis.
Above is a view of the chassis with the shell removed. Remove and set aside the 4 screws as highlighted in red above holding the original
lighting board.

Cut and remove the zip-ties that hold the wires in place and identify the wiring layout to be sure to reconnect it properly to the new board.

Wire the 28mm round speaker and then mount it into the original speaker enclosure found in the rear of the shell. Using the original screws, attach the
IB-MB2 motherboard to the chassis and plug the original connectors into the motherboard according to the included wiring diagram.


Plug in the WOW121 diesel decoder.

Lastly, in order to keep the wires neat and prevent possible shorts, lace the wires into a bundle using lacing cord, which is a wax impregnated string 
used for wire bundling and making harnesses. There are many choices of lacing cord available from Digikey
We use part number 802534B BK032-ND
Your HO-Scale Intermountain ES44DC is now WOWSound equipped and ready to roll!.

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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