decoder installation in Brill Trolley

[peteajr]

I have a Digitrax dz123 decoder that I'd like to put into a Brill Trolley.  Has anyone done this?  Is it simple or complex.  Any tips or instructions would be very helpful.
Happy Holidays (which is the trolley I want to put the decoder in)

[DUCKY01]

See your other Trolley post. The installation of DCC in the Brill Trolley requires soldering, as there is no DCC socket in the stock Brill car. It becomes more difficult if you plan on using overhead wire pick-up, as I do.
Also, most of my Bachmann Brill cars have been remotored with Bowser
powered underframes. You will need to add some additional weight to
the car, which I have done by concealing the weights in the roof. Red &
Black wires go to the truck pick-ups and yellow and gray wires to the
motor. Remove the stock 12volt headlight and replace with a 3volt bulb
or LED with 1000ohm current limiting resistor. Bachmann's Peter Witt cars
are equipped with a DCC decoder with DCC plug that can be easily modified
by removing the DCC plug and hardwiring the Decoder. It's small enough
to fit in the roof area of the car. I currently have (2) Bachmann EZ Command
decoders, pulled from two Peter Witt Trolleys on sale on E-Bay that will work in your trolley.

[peteajr]

Thanks for the informative reply!  I will check out your ebay auction.