PROJECT 2, Headlight wiring up grade

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Originally posted by drivesafe
Hi George130, yes it is a bit messy using 4 relays but for the very reason you mentioned, with the 4 relay set up, if a relay or a fuse goes west, you are still left with 1 light and not in the dark as is the case when using just 2 relays.

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I used 2 relays with twin 87 outputs.
If one relay goes, then I still have the other powering 2 lights (Hi or Lo).
If Hi beam is the only one working, then I'll swap it for to the Lo beam.

I used relay bases, which makes swapping relays very easy(not that they fail often).

Carrying spare fuses overcomes a blown fuse problem.

Yes, 2 fuses and 4 relays is probably a good thing, but in my opinion, it's over engineered.

edit:
I posted the diagram on our work forum, and the guys thought it was great. It was in response to an 80 series problem.
Maybe George130 and I work for the same company!

Hi Ralf_the_RR, from my experience, most vehicles use only two relays but I look at it this was, if someone is going to the expence of upgrading their wiring, why not go whole hog and use the safest set up in the first place. :idea:

If you happen to be going around a corner or through some rough tracks and you relay spits the dummy, it may take only a second or two to realise what has happened and change your dip switch but you could have any number of situations occur during that second or two of darkness and as I am going to be supplying a kit, the chances of this situation, from my point of view, is just not worth the risk. :twisted:

Cheers :wink:

A couple of questions about this - incase you can't tell I'm not very electrically minded :oops: .
Why not just use 4mm wire from the battery to each fuse individually? What size fuses do you use? Will this be big enough to handle 90/130 globes or will the wiring have to be bigger again?

Thanks
Andrew

Hi Andrewpv01, the two fuses are 15 amp and these would be suitable for the 90/130 watt globes.

The only reason for using a single supply wire between the battery and fuse holder is to simplify the installation if the fuse holder is mounted some distance from the battery.

In the case of using 90/1330 globes then 5 mm to each fuse and the used instead of the 4 mm for the rest of the install would be much better to reduce the voltage drop that will inevitably occur when the 130 watt high beams are on.

Alternatively and in my opinion, the use of the new low wattage, high lux ( high light output ) globes from companies like Philips is a better way to go.

I have the Philips Crystal Vision globes in all of my lights and the light is much better that standard 130 globes can put out and use far less power, and so far the globes are lasting much longer than the standard globes ever lasted.

I am operating up to ten lights at a time and have been for over two and a half years now and I have not replaced one single globe and I would probably do at least three times as much night driving as the average person.

Cheers.

Thanks for the info. I will look into those new globes. On my girlfriends car we seem to be replacing 120W high beams every couple of months. She usually uses them for about an hour a day.

Andrew

Hi drivesafe,

Thanks for posting this diagram, it's fantasitc, I found a link to it on the outerlimits forum.

I've been planning to make my own wiring loom upgrade and you've made it easy for me now [img]style_emoticons/<#EMO_DIR#>/smile.gif[/img]

Will be onto it this weekend [img]style_emoticons/<#EMO_DIR#>/smile.gif[/img]

Cheers,

Martin

Hi MartinMonkey, glad to be of some assistance and don’t forget to let us know how it goes and if you can, take some pics and post them so we can all see.

Cheers

yeah will do that, prob be a couple of weeks before I get around to it, but I'll post some pics then [img]style_emoticons/<#EMO_DIR#>/smile.gif[/img]

I plan to use the relays with built in fuses cos I'm lazy and it saves wiring up fuses [img]style_emoticons/<#EMO_DIR#>/tongue.gif[/img] .......like this one:

http://db.hella.com.au/cgi-bin/catalogue.p...iew&flmaint=191

.......24v cos my truck has 24v electrics......

Just started the upgrade on my 2000Disco
12M of 4mm needed
2M of 2mm
Solder (but starting to think I should of went push on clips)
Fuse box
4 relays
I put these in with the jack seems like a good place almost ready for the big test but ran out of the 4mm will need to buy the 3rd roll of 4mm tommorow.
Pics so far
http://www.aulro.com/albums/TeamSlow...icture_383.jpg
[img]http://www.aulro.com/albums/TeamSlowRacing-com/Picture_384.jpg

[/img]http://www.aulro.com/albums/TeamSlowRacing-com/Picture_391.jpg[img]
Sliped the wires in behind the grill after undoing the 3 lug screws ontop
[/img]http://www.aulro.com/albums/TeamSlowRacing-com/Picture_394.jpghttps://www.aulro.com/afvb/

http://www.aulro.com/albums/TeamSlow...icture_385.jpg