A few melted spots in headlight harness
Look at the headlight circuit and you can see how long the path is from the alternator to the lamps.
Also see all the connections the power has to flow through.
Relays are electrically powered switches.
Turning the headlight on with the headlight switch now sends a little current to the relay.
The 9 plus amps for the headlights then go from the alternator through the relay to the lamps.
Look how much shorter the run is, avoids most of the hot engine compartment, involves fewer connections and can use heavier wire.
Look at the headlight circuit and you can see how long the path is from the alternator to the lamps.
Also see all the connections the power has to flow through.
Relays are electrically powered switches.
Turning the headlight on with the headlight switch now sends a little current to the relay.
The 9 plus amps for the headlights then go from the alternator through the relay to the lamps.
Look how much shorter the run is, avoids most of the hot engine compartment, involves fewer connections and can use heavier wire.
