Super Chuffer II Install Problems - Still no joy but closer see update at bottom

The two videos and "Now when wired per the directions:" picture between them are showing, all the other pictures above those items are not showing.

Example of first missing picture below:

The electonics package is setup on a Rev A Mother Board: 

Not surpising, Gun Runner John was right.  What is surprising is that there are grounds and there are grounds.  I found a ground that allowed the chuff to work properly, but now I have a fault in the smoke motor ground on the Super Chuffer II.

I'm confused about the grounding issue.  I normally tie the Super-Chuffer ground (pin-2) to frame ground, and when I use the Chuff-Generator, I return all three wires to the Super-Chuffer.  That insures there is only one common ground, and that's never been a problem with a ton of installations.  I will say that the proper ground is KEY to proper operation of these products, or almost any electronics in your trains.  I do know that the Chuff-Generator is somewhat picky about the ground being good, if you have a floating ground and connect power and the chuff signal, it can take out the output port on the C-G processor.  The Super-Chuffer is normally fairly robust, it takes quite a bit to fry them as a rule.

Ihave to finish the trace put when grounded to the frame of the locomotive, as the marker lights and chuff swutch are, I get multiple chuffs per cucle of the chuff swtch.  I usea ground that disappears into the tender and grounds my headlight I get a single chuff per cycle.  Once I trace the line back to the R2LC, I'll advise.

So here is what I learned.  Grounding the Super Chuffer II (Super Chuffer II, Header Pin 2) to the locomotive frame creates an issue with the ground that yields miltiple chuffer each time the chuff switch cycles.  The locomotive frame is electonically isolated fromt he tender frames.  The motherboard inthe tender is isolated from the tender frame.  The pickups and the grounds form the tender wheel sets both route directly to the motherboard.  To get a ground that allows the SCII to work properly in this locomotive only works by using a cournd that routes back to the motherboard  - eventually the R2LC Pins 3 & 4.

The electrical theory/physics of this I won't claim to understand but I have resolved my chuff issue.  Here is my schematic for the wiring attached for use under a creative commons license:

I have also attached my schematics in an editable format created with a freeware application called ExpressSCH published by ExpressPBC, LLC at https://www.expresspcb.com/expresssch/

I have a new issue now, the fan for my smoke unit does not run when connected to SCII Header Pin 6 as per the directions.  It does however run when connected to SCII Header Pin 7.  I have reached out to GunnerRunnerJohn directly and will add the resolution to that once I have gotten it.  I fully exepect to find out that the fan fault is the result of my work and rework around the chuff fault, just as I wacked the Chuff Generator diagnosing the chuff fault to date.

The fan not running sounds like you zapped the FET that drives the fan at some point.

GJG,

Yes that's what I figure too.  Have ordered a new SCII and am chalking it up to learning.  Still cheaper than maioling it out to have someone else do it.

If everything else works, I could put a new FET on that for less than a new board.