the 2 relays under the driverside battery one is for the intake heater and one is for ????
either one is stuck on or there is a short in or around one i had it cause my gen light to come on so pulled over disconnect them cause the wire was hot its drawing voltage cause it was arcing while it was coming off
the other is are they only a factory part or can i get aftermarket

 

They are both for the air intake heater (grid heater)

 

ok cool thanks