[Pippoe]

Hi there!

I run a M20+ w/o sound but with an added switch module.. using a 4-ch radio.

The M20 needs two channels, one for throttle control and one for the lights (turn signals, low beams, high beams, four ways)

Channel 3 is used for the steering servo and channel 4 for the switch module (search light, more lights, flash-to-pass, <unused>).

.. you could hook up your horn on channel 4, provided you don't want to add more than basic functions to your truck and run it with a 4ch radio.

I don't use the automatic coupler.

Cheers

Pip