Re: Pusbutton schematics.

Posted by BH On 2011/9/10 11:05:28

Howard -

Thanks for the clarification. Yes, since a yellow wire for the pushbutton "P" circuit was added in conjunction with the park relay, I see how that might be confused with the original yellow feed wire for the control panel. Perhaps yellow was chosen, originally, for that feed wire since - as you noted - it got its power from the ballast resistor.

I had wondered about using a relay, but backed away from that, thinking we don't need the additional current draw. I'm no engineer, but not sure that we're dealing with enough amperage to merit a relay over a good switch.

Thinking further on this, perhaps I don't need to complete the circuit between yellow and tan wires at all, since bypass would only be needed with ignition OFF - at which point, power feed to pushbutton control panel is cut-off, anyway.

So, a simple, remotely-mounted, SPST switch and a pair of new green wires, installed in place of the original green wire between the breaker and the park relay might be all that is needed to temporarily deactivate the park relay. Again, not much different than the cut-off switch for the automatic levelling system.

Yet, thanks to your insight, I also plan to install a 9A fuse/holder between the white wire and the corresponding terminal on the park relay.