Lionel PW ZW replacement of rectifier with diodes problem

The only thing I could think of is double checking the wiring and make sure nothing is touching and bleeding over. Pictures of your work would also help. I have do a few of these before and I always have to use a new wire because the old one for me is too short. So maybe it's soldered in the wrong spot

Thanks Jerry

I too had problems with short wires so I extended the wire that goes to the shaft spring.  Right side only needed it.
I checked all the continuity and diodes and everything seems fine.  So I thought what is different from my right hand track and left hand track.  The difference is I have a Lionel sound activation button on the right hand lever track so I can activate bells on some newer engines.
I didn’t think this would have any effect since I did not activate when installing the diodes.
but i pushed it and cycled it a few times.  
The whistle switch now works correctly.  Somehow that activation switch was stuck on sending 1.6v dc to the track continuously.
I don’t understand why but the whistle works now.  I haven’t tried a bell yet.  That’s for another time.