Adding a relay is a great idea. Back in the 90's we had trouble with Dodge trucks burning the contacts on the headlite switches and headlties going out. It was because of the high current the headlites carry that over time it burned the switch. So they came out with a TSB to install a relay for the headlites to take the load off the switch. I installed many back then as they even had a part # for the harness with the relay they gave us to wire in. Ron
Ron that was on the 94 and newer trucks. I agree we also updated a lot of them. Still a good idea on the older trucks.
