Hi,
I recently purchased new sealed light (high beam) for xj6 series 2. It came with no globe but is for the h4 globe with no wiring.
My current set up I assume is original and has 2 connectors for the light/ sealed light.
I purchased a H4 globe harness for the new light, my question is can I join the original to the more modern H4 connector (eg 2 wires to 3) or should I seek auto electrician?
I have tried searching but to no avail.
regards Clayton

 

I'm a little confused but I'll have a stab at answering

An H4 bulb is dual filament (hi-lo) bulb, with 3 terminals. These would normally be used in the outboard position on the car.

The inboard position ("high beam") would normally use a single filament bulb. The lens of the lamp itself is designed differently than the hi-low outboard lamp.

So I gather you want to use a dual filament H4 bulb in the inboard headlights. Shouldn't be a problem in terms of wiring configuration. One terminal is ground, the other two are "+" voltage for the hi -lo filaments. You can have one or both filaments operational. If you want both just join the hi-lo wires together and splice to your existing wiring. The worry here, though, is that the existing wiring might not be able to carry that much load. Jaguar was not generous in wire sizing. Might be safer to use only the "hi" filament, leaving you with a two wire installation (power and ground) that is easily adapted to your existing wiring.

Cheers
DD

 

Hi Doug
Yes I am referring to inboard lights and you answered what I was hoping. I'll just connect the 2 wires for the high. Thanks

 

The inboard lamps use an H1 bulb, not an H4, so they have just the two connectors.

 

Thanks Greg . That means I don't need to do any cutting or splicing
cheers Clayton

 

The photo shows both the outer H4 lamp and the inner H1 on a 1990 V12 Vanden Plas. On the inner one you can actually see the bulb if you look closely.

 

Sorry I should have attached photos earlier . The 2nd photo is what I ordered ( I was hoping it was a plugin and that was it). I purchased a H4 connector thinking it would work but the original has 2 wires, the connector has 3. I also purchased a H1 globe but can only see one connection for the back of the globe. I will try what Doug suggested.

 

The H1 bulb has an earth connector on the metal part, look carefully and you will see it, and an insulated connector on the centre for the live feed.

 

They have supplied you a H4 5 3/4 Beam Unit where they should have supplied a H1 Beam Unit.

Adaption is the only way, OR get then to swap them for H1.
The Inner were the Distance lamps of the Series cars, and the cut of the lense, as already mentioned, was different. You will lose the long distance throw with those Beam Units.

I would be swapping them for H1, but its your car.

All my Series cars had 100W Aircraft Landing Light sealed beams in that position, but I think in 2020 they be illegal, bugga. Awesome distance on our loiely outback roads.

 

Thanks Grant,

 

I put those on a car once, out in the looooong, dark, deserted roads of Big Sky Montana, and they were Great as you say.

I also upgraded the outer lamps to 80w/100w, which required a relay for each fixture as the extra power Welded the points of the shared relays. but there was plenty of room for the added components and wiring, and the extra light was Definitely worth the trouble.

However, when I came to California, I learned very soon these were, as you say, Illegal! So now I have to be satisfied with 55w/80w cutoff beam outers and 80w pencil beam inners. But now there's so much more traffic now than when I first came to this part of the world, that High beams seldom get used on any of my rigs.
(';')

 

I purchased this car in later parts of the day and drove it home from My Gambier to Adelaide (4 1/2 drive open road). When it got dark I had trouble putting the lights on, managed to work the lights out then I couldn't get high beam. Drove home with normal lights which wasn't ideal conditions, at least I didn't upset the truckies.
I managed to get high beam working once home (with the advice of fellow members eg clean the fuses and connections!!) except for the one light mentioned that isn't working. In these xmas holidays will try the suggestions mentioned.

 

High beams work a bit better if you put a relay in the circuit rather than routing headlight power via the dash switch.

You can use the dash switch to just operate a relay and take power straight from a firewall post.

I plan to stick a light bar on mine as we have too many deer, roos and wombats where I live , its a plague this year.