This installation is for a HO-Scale Intermountain ES44ac using a TCS IB-MB1 with a built in KA2 Keep-Alive™ device and WOW121-Diesel decoder and was performed by TCS.

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
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-3 which was used for this installation.
IB-MB1 Motherboard with Keep Alive™ WOW121-Diesel Decoder JST Speaker Harness 28mm WOWSpeaker
Click here for more information on the WDK-INT-3 and the rest of the WOWDiesel Kits line.

HO-Scale Intermountain ES44ac prior to TCS IB-MB1 and WOW121-Diesel decoder installation.

HO-Scale Intermountain ES44ac prior to TCS IB-MB1 and WOW121-Diesel decoder installation.

In order to remove the shell, we must first remove the front and rear couplers and their housings.

Next, we must carefully detach the side railings and step railings from the cab area of the shell. The blue rectangles denote the areas of the railings to be removed.

With the coupler assemblies and railings detached, the shell can be lifted up and off of the locomotives chassis.

With the shell removed, we can now unplug all the JST connections and remove the four screws securing the factory light board.

Next, desolder the F4 wire lead from the factory light board.

With the factory light board removed we can now mount the TCS IB-MB1 and secure it using the four screws removed earlier.

Once secured, reconnect all the JST connections being mindfull of their proper placement.

Next, resolder F4 to the inner pad on the TCS IB-MB1. Note that every pad and connector position on the IB-MB1 is the same as how it was positioned on the factory light board.

With the IB-MB1 mounted and connected, we can now work on the speaker install. A 28mm speaker baffle is included with this locomotive and is located under the cooling hood.

Carefully lift up on ths side lips of the hood and remove it from the rest of the shell. Next, remove the speaker baffle from the shell.

For an easy install, we used our JST Speaker Connector (Item # 1660) and soldered the one end to our 28mm WOWSpeaker (Item # 1555).

Next, align the wires with their exit channels and carefully place the speaker into the baffle.

Next, reinstall the speaker and baffle assembly into the locomotives shell. Reinstall the cooling hood onto the shell.

With the speaker set up complete, we can now connect the JST lead from the speaker to the IB-MB1. Next, install the TCS WOW121-Diesel Decoder.

Finally, place the locomotives shell back on and reintsall the front and rear coupler assemblies and railings.


You have now installed a TCS IB-MB1 with a built in KA2 Keep-Alive™ and WOW121-Diesel decoder into your HO-Scale Intermountain ES44ac.

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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