I added the extra wiring for the light solenoids. From the back of the alternator, I add some cable (not wire) to the positive feed for the solenoid. Connect an earth directly from the front chassis mount bolts to the solenoid. Connect the low current positive feed from the light switch to the solenoid. Make new heavy gauge wire earth feeds from the chassis mount bolts to each headlight and driving light. Make new heavy wire positive feeds form the solenoid outputs to each headlight. This will allow running halogens or xenon lights, but be careful since these lights run hotter than the originals.