Are Ground of Operating Unit & Controller of Demco Stay-IN-Play DUO Connected

Question:

For the Demco DM86VR/SM99251 the installation wiring diagram shows two wires from the operating unit to the G-Force controller. One wire is labeled 12v signal and the other system ground. Is the system is this ground wire an isolated ground wire between the two units with no breaks or slices in it or can this system ground wire on each end tie to the chassis instead of routing between each other? Also for this wiring diagram the indicator light is tied to the break light switch and the ground wire is tied to same ground as above, the ground between the operating unit and the G-Force controller. Does the indicator light ground have to tie in this ground wire between the two units or can the indicator light ground tie to the chassis?

asked by: KJ

Expert Reply:

The 12 volt and ground wires between the operating unit and G-Force controller of the Demco Stay-IN-Play DUO Supplemental Braking System # DM86VR are isolated with no breaks and should not tie to the chassis instead of routing between each other. The indicator light does have to tie into the ground between the two units as well.

expert reply by: Kyle S