Code 3 RLS 3999R Arrowstick

[CommunicationS]

I have a new to me RLS 3999R unit using to control my mx7000 with arrow stick. Arrowstick worked great with its own individual module, but doesnt want to work with the RLS Unit. After I hook up the colored wires, im left with 2 red wires from the arrowstick harnes. I supplied +12v to the plug that requires it. is the arrowsticks negative controlled? maybe needs +12v to harness as well?
Sorry if this is posted in wrong forum

 

[shues]

Unless it is one of the very oldest models ever made, your Code 3 ArrowStik is negative switched. You will need to provide +12v DC to the red wire and the red/black wire in the 7-wire harness.