ok coles, if you have the low and hi hid's, the 4 hi is super simple. i went to radio shack and got the biggest diode they had, unsure of exactly which one i needed. a diode is like a 1-way switch for electricity. electricity can flow one way, but not the other. (if you ridiculously overdrive the diode the wrong way, it can drive through, but installed correctly, it's one way.) anyhow, i just ran a diode between the #85's on my relays, from the high beam relay to the low beam relay. on the diode it'll have a silver or gray mark or band on one end of the relay. make sure the gray band is facing TOWARD the #85 on the low beam relay. i soldered some wire to the diode, like this.
----====(diode)====----
i then heat shrink tubed the relay and wire connections, took the opposite ends of the wires, stripped them back, pulled the relay connector off of the relay, and stuck the stripped wire into the female adaptor of the relays and reinstalled the relays. if you have the ddm hid's, the 85 is the blue wire. what it does is allow electricity to "trigger" the relay for the low beams when the high beams are on, but does not allow electricity to backfeed from the low beam relay trigger wire (blue, or #85) over to the high beam relay. what took the longest was soldering the wires together. i know that just jamming wire into the relay connection isn't exactly the most professional way to do it, but i didn't feel like stringing out an extension cord and trying to solder the wires the proper way. i'm also not the best at soldering stuff. anyhow, works like a champ. now my lows are on when low is selected, and all 4 are on when the highs are on. so the 25 cent explanation of a diode is a one-way gate/switch/valve, however you wanna look at it for electricity. now this is for having 2 relays, one for the low beam hid's and one for the high beam hid's. if you don't have the hid highs and lows, then it'll be a little different. but if you have the 2 relays, it's an easy gig, probably took me all of an hour or so to figure out which wires were which on the relays, solder some extra wire on the ends of the diode, and install it. and if you weren't totally sure how the relays work, you have power from the battery going to the relay, and power that will be leaving the relay once the relay is "triggered." the "trigger" wire is the wire that comes from your headlights when the switch is turned on, and closes a switch inside the relay when powered. the relay then allows power to flow through the relay, until the switch is turned off, at which point the relay de-energizes, and stops the flow of power through the relay's internal switch. relays are typically used to allow a small amount of power to close a switch and supply a larger amount of power. such is the case with the headlights. the relay trigger is not a very large amount of power in relation to the amount of power that the headlights use. another use of a relay is like in your home a/c thermostat. many home thermostats use a 24v signal to trigger a relay that supplies 110/220v to the a/c unit. sorry for the rambling, but that's the 50 cent electricity lesson for the day. hope it helps out. branndon.
