[bumstein]

Hey y'all!!

Ok, so I've got a set of HID Hella Rallye 4000 compacts to pop into my Sierra.. I took them out of my Holden Adventra a wee while ago, now I'm trying to get my head around the wiring harness!!

I have been trying to figure out how the harness that I removed from the adventra is wired up, and if I have to modify it (for the funky high beams that the Sierra/suzukis sport) or can I just reinstall the harness as is, and splice it into Polly's (that's the cars name) high beams..

So what I've figured so far..

Positive feed from battery, through 30 on the relay, switched to 87, feeds 12v to the HID transformer...

85 (from the relay) runs through the in-cab switch and terminates at a splice clamp (wired black)..

Terminal 86 runs a yellow/grey straight to a splice clamp..

Now!!!!! If I have gained an understanding from my many hours (roughly 10+ hours) of searching, testing the loom and educating myself, I think that I probably don't need to modify my wiring harness, but to rig it up to switch off the high beam of the car I need to wire;

Terminal 85 (runs brown wire, to red, through in-cab switch to black wire and splice clamp) into the "ground" wire of the drivers side head light..

Terminal 86 (yellow/grey wire straight to a splice clamp) to the "drive" wire of the drivers side head light..

I will try and post a pic of the schematic I've made of the harness.

I'm sure there's an amazingly insightful Auszooker prepped to tell me if I'm barking up the right tree or mooing at the wrong at the wrong farmer..

Thanks ppl

[bumstein]

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ImageUploadedByTapatalk1360505327.830454.jpg

[fordem]

As per your wiring except change terminal 85 to - through in cab switch to dash light feed.

On a Suzuki, the "drive" terminal of the headlight is at 0V when the high beam is on, so the above wiring will allow the relay to energize only if a) the lights are on and b) the high beams are selected.

Oh - you only need one relay - they're usually good for 30A so just hook both ballasts up to the same relay and you're good to go.

[royce]

No thats right, you only want them to come on when the lights and high beam are on

If I was to be picky I would say that the terminal marked ground on the stock headlight plug should go to terminal 86 as its got 12v on it so diode protected relays will still work

An alternate method, join pin 86 to pin 30 on the relay, run a wire from pin 85 to the switch, then switch to DRIVE on the light plug

youll have less wires running about, and less wires with 12v on them

[bumstein]

Thanks for the help!! Still getting my head around it (but I am learning )

As the wiring harness is already made (and very neatly too) I want to modify it is little as possible..

Attachment:

ImageUploadedByTapatalk1360540030.723998.jpg

So Royce,

Are you saying is should swap the 86 to the ground, and 85 through the in-cab switch to drive??

Alternatively am I better off with fordem's suggestion of putting it through the dash light feed??

[royce]

Yes go that way, however you are better not using the terminal marked ground (its not actually ground its got power on it) and jsut going to pin 30, then if for some reason your relay shorts out inside you only lose those lights, not all your headlights

Nope, do it my way, no need to have switched positive on a Sierra, as the High beam wire you are taking the feed from wont earth until the lights are on AND high beam, some other makes dont do this (Toyota for example)

[bumstein]

Thanks mate!!

So just to clarify...

Terminal 85 runs through the in-cab switch and splices into the drive wire of the drivers side headlight..

Terminal 86 runs straight the terminal 30 (or in other terms, constant 12v supply straight from the battery but post fuse)..

Other than that, everything the same as my schematic..

Does that sound right??

If so, what is the drive wire?? Does that earth the high beam when it is switched on?

Sorry to ask so many questions, your help is very much appreciated!!!

[royce]

yep thats right, for those at home the drive wire is the right hand vertical pin when viewed from behind the plug

yeah the way the headlights work is
the usual ground terminal for positive switched headlights has 12v on it all the time, so both filements have power available all the time
then you have 2 wires, one on low and one on high beam that go to the dipper switch, then the dipper has a common wire out into teh headlight switch, when this is turned on it grounds

so its battery + > fuse > headlight > dipper switch > headlight switch > body earth > body to battery -

[bumstein]

Champion bloke Royce!! Thanks mate

[bumstein]

Thanks Royce!!

I've wired the harness up as you've said and it seems to work a treat!!!

I haven't put the transformers or spotties on yet.. But it's switching 12v to the blue transformer terminal, and cutting power if the high beam or the in-cab switch is off

All this effort and I'm grinning from ear to ear!! It's a great feeling when your effort produces a result!!