Hello all,

new to this forum and to large scale.  I'm rebuilding a wreck of a three-truck Shay which had the circuit boards removed and cut-off wires floating loose under the bunker when it arrived (supposedly setup for wireless control according to the eBay ad but was absolutely unusable when it arrived - the shop that sold it to me did do a partial refund when I sent photos of what was missing under the bunker and water tank).

I've just finished wiring it with an ESU 5XL decoder and an Airwire receiver after tracing all the wires including the loom to the water tank on the third truck (Bachmann colour coding changes in the loom to the rest of the engine when testing across the pins on the connector board).

All is working but my question is does any one have knowledge of how to wire both the ashpan flicker board and the firebox flicker board?

The Bachmann circuit diagram just shows the colour of the wires going to the main circuit board (which does not exist in my engine courtesy of the butchery done to it before) and does not show any resistors in line with the positive LED feeds.

The Ashpan board has 3 pin connections:

• Y1 - Yellow
• R1 - Green
• GND - Blue

The firebox board has four pin connections with no indication which is ground:

• Orange
• Brown (across 2 pin connections)
• Red

I'm not prepared to make any assumptions here based on colours - given both wires to the cab light are purple and the ashpan ground is blue!

I also think the ashpan board has been cooked by not having resistors in the positive feeds so I will probably have to replace the LEDS as well.  (the board doesn't appear as a spare part on the Bachmann site)

Any help would be appreciated.

Regards,

David P
Melbourne, Australia