And here's how, for A2s with US-spec aero headlights - the ones that suck at night. When I last posted, it was to ask about the best way to wire my new euro-aero H4 lights. I received one response, advising a permanent clip-n-crimp. But I didn't want to do that. Here's what I did do. You need: 1 pair euro-aero headlights (APS, $250 with shipping - bulbs, but no wires) 1 pair stick-on vinyl headlight protectors (from dealer, $40) (if there are any rocks in your area) 1 pair Bosch 30-amp fused relays (from dealer, $8 apiece) 1 pair Hella US 3-prong to H4 3-prong adapter-pigtails (dealer got them from Hella, $13 apiece) stuff from a department store: 2 10' lengths of 12 gauge wire (use more than 10', less than 20') for power - red is nice some other short pieces of wire bunches of connectors a few zip-ties The wiring takes the longest time. Pop off the grille, carefully so as not to break any of the brittle plastic pieces which can only be fixed by getting a whole new grille. Remove old headlights, use for paperweights. Or if you're absolutely, positively sure you won't ever need them again (which I couldn't say) dispose of them permanently in a vicious manner of your choosing. Cut two lengths of wire to run from your chosen relay location (mine was between driver's side headlight and the battery) over to the passenger side light. There is a nice crossmember at top-of-bumper height, handy for fastening wires to with zip-ties. Cut two much shorter lengths to go right there from the relay to the driver's side light. Hook these up to your dual-output relays in pairs. Make some ground wires in the area of your mounts, hook these to the brown wires of the Hella pigtails. Wire the power wires so that one relay goes to the white wires (of the pigtails) and the other goes to the yellow wires. It doesn't matter which relay is which, as you will see in a moment. Grind two spade connectors down enough (about half their width) to fit in the 9004 plug. Hook one to the coil of each relay with some small wire, and ground the other sides of course. Now two more lengths of your red wire go from the starter solenoid connection (oh, you want to pop the negative terminal off the battery first, of course) to the power side of the relays. Zip ties all over to keep things tidy. I even used zip ties to secure my relays to two holes already in the area in front of the battery. Tape over the unused 9004 plug on the passenger side, and put it somewhere where it won't flop around (more zip ties!). Install your H4 lights, setting the alignment screws to approximately the same position as your old lights' screws. Mine are now pointed in slightly from before, but if you have a fairly well-aligned grille, they will look pretty square in it afterwards. Now, having reattached your negative battery terminal, stick one ground-down connector into the blue-wire terminal of the 9004 plug on the driver's side, and the other in the white-wire terminal. Make the lights come on (usually by starting the car and turning them on). Flick back and forth between high and low beams to see if you need to switch the wires around in the 9004 plug. I got it right the first time. Hey, 50/50. There will be a marked difference in the high and low beams - just wait till you drive at night! If the high beams are truly on when the little blue lights in the dash indicated they should be, wrap up the plug and wire with some electrician's tape. You should also have wrapped up the wires on the new relays before securing them. Reattach the grille, and go for a night drive with your small Phillips screwdriver. Adjust alignment as necessary. The beam centers should be directly in front of the lights, same height above ground and separation, out to 25 feet or so. I haven't had any complaints from the low beams. And aren't the high beams great? You have to be careful with them, though. Because I said so. Don't blind anyone unless they are sitting in front of you going 10 mph under the speed limit on an uncrowded freeway. Then zap 'em and watch them move over. Drive safely, now. Henry Harper 1988 GTI 1.8 16v, 150k, ticket-me red, 2.25" TT cat & stainless cat-back, Bilstein Sports, K&N, new euro-aero H4s, really wants a sixth gear now