The trailer marker lights on my 28' horse trailer are controlled by the headlight switch. The switch gets hot and over time burns out (there are about 20 lights of various configurations on the trailer). The marker lights are also dim as the feed from the switch is only about 8 volts. How do I go about fixing this? I don't want to wire the trailer markers to a separate switch on the dash as I know for certain I will forget to turn them on. Thanks!