The stock US sealed beam connectors can be used on the H4 bulbs. I was lucky enough to have the H3 connectors come attached to my lights, but I could have easily done without.
The actual terminals inside the connectors are essentially female disconnects, but they have a little tab which holds them in place. With the connector facing you (so that the wires are going away from you), insert a little flat head screw driver in the little notch of each terminal. With a little wiggling, the disconnect should pull out from the back of the connector. With a few practice tries, this becomes easier.
I removed the original wire from the connectors, soldered on the new wire, and then replaced the terminal in the connector.Wiring the H4. Don't be fooled! Just because the H4 bulb uses the same connector as the US bulb, doesn't mean the wires hook up to the same place. Holding the connector facting you, so that the wires are leading away from you, the wires should be hooked up as follows.
The TOP wire is for the LOW BEAM. The LEFT wire is for the HIGH BEAM. The right wire is for the GROUND. If you have the left and right wires reversed, it's not a big deal; you'll know because when you turn on the low beams, the high beams will glow dimly.
Wiring the H3. (Your lights may instead use H1 bulbs). You can use the H3 connector as I did; the procedure for replacing the terminals is the same as for the H4. The side of the connector with the little "tab" is the negative side. You can also make sure that it's negative by looking at which wire leads to the body of the light fixture itself. The negative will go to the body of the light.
Here's a summary of all of the wiring you need to do for the low and high beams:
- BATTERY POSITIVE to each relay at TERMINAL 30
- BATTERY NEGATIVE to each relay at TERMINAL 85
- BATTERY NEGATIVE to each light for the H4 (RIGHT on connector), H3 (terminal with TAB) and CITY LIGHT (also w/TAB)
- FACTORY WIRING LOW to each LOW BEAM RELAY
- FACTORY WIRING HIGH to each HIGH BEAM RELAY
- TERMINAL 87 of each LOW BEAM RELAY to H4 Low (TOP of connector) on EACH SIDE
- TERMINAL 87 of each HIGH BEAM RELAY to H4 High (LEFT on connector) AND to H3
Wiring the City Light. All that's left to do is wire a positive lead to the city lights. I wanted mine to come on with my parking lights. Using a voltage tester, I figured out with lead to the side marker lights was for the turn signals and which was for the parking lights. I spliced in another wire to to the parking light and ran it to the city light.
Where do the relays go? I put them right in front of the battery, mounted on that little wood piece. I liked the idea of putting them there, close to the battery, for a number of reasons. First, they're easy to get to if something does go wrong. Secondly, it's an area that generally doesn't get wet at all. And thirdly, by putting the inline fuses close to the battery, you minimize the chances of an unfused short circuit.
Where does all the wiring go? I put all of the wiring in flexible tubing so it looks much better. You can see some of the tubing in this (albeit, bad) picture. (Ignore the red wires, I wasn't done with all the connections yet!!!)
Using this tubing, I ran the wiring for the passenger side behind the grille but in front of the radiator. It rests neatly against the top of the spoiler in there, and even if you could see it (which you can't), it would look neat.