DCC Decoder Wiring Query

[busdriverGP]

I have a NEM651 Lenz Silver decoder which I am trying to fit to quite an old N gauge model. As this decoder doesn't have a blue wire for the lighting common I'm struggling to work out where I can get the common for the lighting from. Any help would be appreciated.

[Nigelcliffe]

You don't need the common positive blue.   

The positive of the lights should connect to one of the chassis pickups.  That gives "half-wave" power into the lights, and they then connect to the decoder function outputs (white, yellow, etc..).  

 

( It will be in the manual for the Lenz decoder, or any other properly documented decoder.  ). 

[RAF96]

3 hours ago, Nigelcliffe said:

You don't need the common positive blue.   

The positive of the lights should connect to one of the chassis pickups.  That gives "half-wave" power into the lights, and they then connect to the decoder function outputs (white, yellow, etc..).  

 

( It will be in the manual for the Lenz decoder, or any other properly documented decoder.  ). 

Extract from the HM7K decoder manual . . .