Rewiring the stock headlight circuit for lots more power They were wanting to bypass the entire stock headlamp circuit so they could replace the existing candle in the front with a high wattage (100/130w) bulb. They were concerned with how many external relays they would need to accomplish this. My reply: You can do this with one (1) single pole double throw (SPDT) relay, but unless you add a separate on/off switch in the fused line, there is no way to turn off the low beam. See: http://www.mindspring.com/~gbyoung2/misc/electrical/hdheadlamp1.gif To make the system fully 'automatic' like it is now, the minimal amount of relays you will need is two (2). See: http://www.mindspring.com/~gbyoung2/misc/electrical/hdheadlamp2.gif Basically, when you turn on the ignition and poke the starter button, the blue wire coming out of the j-box will become hot and pick up relay #1. This is the same wire that normally turns the headlight circuit on now. With relay #1 now energized, its normally open contact (terminals 30 & 87) will close and put battery power to the common terminal (30) of relay #2. If the headlight switch is in the low position, relay #2 will be de-energized and the low beam will turn on through this relay's normally closed contact (terminals 30 & 87A). When you put the dimmer switch on high, relay #2 coil will be energized, the high beam will turn on through this relay's normally open contact (terminals 30 & 87), which is now closed. Put the switch back on low, relay #2 drops out and the low beam comes back on; high beam goes out. Turn off the ignition, relay #1 will drop out and disconnect the battery from the lamp circuit. Guy