Spectrum 83902 HO 4-8-4 Class J will not run forward

[MLJ]

New out-of-box Spectrum #83902 HO 4-8-4 N&W Class J loco with Tsunami sound will not operate in forward direction.  Operates in reverse direction and all Tsunami functions operate correctly.  Any suggestions to fix?

[richardl]

Welcome.

What DCC system are you using?

Usually the first thing to do is a decoder rest if running issues. CV8, enter 8. Disconnect power to loco. Connect power and it should run on address 3.
I have done that at times.

Rich

[MLJ]

I originally tried powering off and restarting using address 03.  It runs fine backwards and all decoder functions operate.  It just will not run forward.  It acts like a siderod bind, but cannot see it binding in forward or reverse. 

[rogertra]

I originally tried powering off and restarting using address 03.  It runs fine backwards and all decoder functions operate.  It just will not run forward.  It acts like a siderod bind, but cannot see it binding in forward or reverse. 

Did you try a decoder reset, which is what Rich suggested below?

Set CV 8 to 8 and see what happens.

Powering off and restarting is not a decoder reset.

Cheers

Roger T.

[MLJ]

Thanks for suggestions, Roger and Rich.  But before my first posting, I originally had reset decoder CV8 to 8 before the reboot to address default 03.  It did not correct issue.

[Joe Satnik]

MLJ,

I suspect a bad decoder.

Does the flywheel turn freely (by hand, controller off) in both directions?

Is there a DCC plug? 

Can you put in the DC jumper plug and try to run with an old analog DC power pack?

Let us know.

Thanks.

Joe Satnik