Aux and/or VSIM

[LukeO]

Appreciate some help as I attempt to make this idea more complicated than it needs to be …

I’d like to add a set of Reverse Aux lights that can be run via Aux switch off battery… and at the same time operate via the VSIM output when Transmission is in Reverse (PIN 12 circuit W702 or J1939 Parameter 2392 maybe). Instead of tapping the actual reverse light wiring harness

Aux pushes +12v and the W702 pushes a ground. So how can I make those operate the Aux lights either OR Aux or VSIM?

 

[superjoe83]

Use 2 relays, one triggered by the aux switch, the other triggered by the VSIM, hook both outputs of the relays together so either can send 12v to your lights. I can draw a rough diagram to make more sense if you want

 

[Dinky503]