On the chime you should have 3 or 4 terminals, at least 2 of which have wires
One should read "common".
One should read FRONT
One should read REAR
The 4th, if you have it, should read SIDE
Remove the wire from "FRONT" (which causes ding-dong) to REAR - and you'll get
either dong-ding or just a dong.
Do NOT connect it to the "side" door terminal, or all you'll be left with is a