Running lights on when camping, use a fuse & dimmer?

RoyB wrote:
The only positive thing I ever thought this to be good for would be to FLASH to alert authorities coming to your trailer for an emergency...

I built a trailer lights dongle that would flash ALL the trailer lights when backing off the street on to our driveway.







Hard to imagine but apparently even a travel trailer isn't big enough to alert dummies racing down the street that they might have to slow down a bit and pause while I complete this process. :S