Postwar diesel ERR conversion, light question

I'll be converting a Postwar F3 (2343) and GP7 (2328) to TMCC using ERR AC Commanders in the next month or so. The only issue I see is the headlight/rear light on the locomotives. The power wire can connect to the ERR board fine. The issue is that the lights are grounded through the socket, which is grounded to the chassis. Will the ERR board still control the lights if only the power wire is connected to the board and the lights are grounded through the chassis? Thanks.