I recently took a 400 mile trip hauling 6500 lbs of camper with my 5.3L truck.* Never thought to check out my dry cell during vacation.* Last night I checked it out for water level etc and noticed it wasn’t operating.* I have 2 fuses in the system,* 1 located between the on/off switch and relay (powered from windshieldwiper fuse), and the other inline between relay and battery.* The 30amp fuse located in the switch line fried.* I replaced it and the system still wasn’t working.* The 2nd 30amp fuse was ok, continued to check things out, disconnected the Relay and noticed that the inlet side was partially melted. **There is my problem.*
The relay is located along the outside wall of the engine area tucked alongside the battery. Why would the relay melt?