I think these lights together are only about 3 amps. I was thinking a direct lead off of the OEM back up lights wouldn't hurt anything. Maybe put a diode in the power line coming from the Central Command to the new lights and a diode in the piggyback wire I run from the OEM lights to the new lights just to make sure there is no back current in either direction? With respect to a diode, does it need to be the same (or larger) amperage than the lights would draw, (so one 3 amp diode for each line would work?)
Thoughts?[/QUOTE]
As long as you are ok with the new and old lights running when you manually turn them on then I don't see any need for a diode. And any power back feeding to the central command when you engage reverse will only go as far as the relay because that terminal will be dead at the time.
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