H-4 headlight conversion (CJ-7)

[chinard]

Howdy, peeps...
I just finished installing the Eurolight H-4 conversion on my cj7.
Had to cut parts of the light housing to install them, but overall it was pretty easy.
the H4 lights provide more even light coverage and seem to draw alot less power than the older style headlamps which is handy considering my alternator BADLY needs an upgrade... (thats okay... i've got a 150amp alternator on order that should be here tuesday)

Anyways, Here is what i was wondering...
These headlight conversion kits have actually 2 lighting elements in them. They have the normal H4 bulb, and they have a smaller bulb installed off centre for use as a daytime running light.
Now considering that my jeep pre-dates daytime running lights as a standard feature, I think i would like to try to wire em up to turn on when the ignition is on.
Any suggestions on the best way to wire this up?

 

[XJNick]

Hook them up through a relay, with the coil triggered by the ignition switch. If you need the diagram, look at the following post:

http://www.jeepz.com/index.php?name=PNphpBB2&file=viewtopic&t=318014

Be sure you have a fuse both between the batt and relay, and between the ignition switch and relay

Another thing to consider is that these lamps would be on all the time. In order to have the Daytime running lamps switch off when the headlights are on, you'd use two relays in series (one being a 4-pin and one being a 5-pin relay).

Let me know if this is what you'd like to do, and I'll make you a wiring diagram :mrgreen:

-Nick :!:

 

[Snitty]

ooooh the possiblities of relays..... i love them... and its also good to rewire the power to the new H4 bulbs to a relay... many people, including myself have found numerous burnt sockets from the conversion... running a relayed power from the battery, using the headlight power to switch it, will help reduce that

 

[XJNick]

Ok, I went ahead and modified another one of my drawings for you :mrgreen: Here's the kind of circuit you should use.

Notes: the wires that are gray are existing wires you'd tap into. Also, notice the line thicknesses. The power carrying side of the relays should be wired with like 12 or 14 gauge wire and the "signal" or coil sides of the relays can be wired with 18 gauge wire (since very little power goes through these). Also, note that the relay terminals 87 and 87A are NOT the same and cannot be swapped. Your five pin relay MUST have an 87A terminal

-Nick :!:

 

[Snitty]

you may also want to run a cutoff for the supply to the first relay.. this will allow you to turn the daytime runners off if wanted

 

[XJNick]

Yes, Snitty's got a good idea. You can just add that switch between the fuse and coil of the 1st relay :mrgreen:

 

[chinard]

Holy crap thats alot of info... :wink:
I'm gonna have to try some of these things next week after my alternator comes in...

 

[XJNick]

:lol: :lol: :lol: :lol: :lol: :lol: :lol:

-Nick :!: