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There was a thread not to long talking about the Hella bulbs and there is a Hella harness you can buy to run them. It had part numbers and all in it.
yes. I learned this was even a thing from that thread. Im doing this to diy my own harness. Cost being one reason, but even more for me, the chance to learn a new (to me) thing. Ive done enough wiring, 12v, 110, and 220, that im not concerned about my ability to assemble, im just trying to learn what is happening, and how... if im tracking, the only part i will need to buy, will be the relays themselves. I should already have everything else i need.. though i may need to buy the lamp sockets, if i cant cabbage onto the existing ones in my truck for whatever reason.
yes. I learned this was even a thing from that thread. Im doing this to diy my own harness. Cost being one reason, but even more for me, the chance to learn a new (to me) thing. Ive done enough wiring, 12v, 110, and 220, that im not concerned about my ability to assemble, im just trying to learn what is happening, and how... if im tracking, the only part i will need to buy, will be the relays themselves. I should already have everything else i need.. though i may need to buy the lamp sockets, if i cant cabbage onto the existing ones in my truck for whatever reason.
Bosch relay part # 0986332002. 70 amp capacity, with the load carrying circuit having double sized connectors. I did a quick search for the double sized "flag terminals" that are used to connect the bigger sized terminals but came up empty. There's tons of the .250g ones to be found for the smaller ones. If you can find larger sized flag terminal connectors, these relays will more than fit the bill. If all else fails you can get the 40 amp version, part # 0332019157, but they don't have the double sized flag connectors on the load carrying circuit.
Circuit diagram is printed on the housing.
30 is 12v power source, preferably straight off the battery post with the appropriate fuse.
87 is the load.
86 is the exciter lead. Can be one of the wires that power either the high or low beam filament. (Yes, you'll need a minimum of two relays.)
85 goes to ground.
Bosch relay part # 0986332002. 70 amp capacity, with the load carrying circuit having double sized connectors. I did a quick search for the double sized "flag terminals" that are used to connect the bigger sized terminals but came up empty. There's tons of the .250g ones to be found for the smaller ones. If you can find larger sized flag terminal connectors, these relays will more than fit the bill. If all else fails you can get the 40 amp version, part # 0332019157, but they don't have the double sized flag connectors on the load carrying circuit.
Circuit diagram is printed on the housing.
30 is 12v power source, preferably straight off the battery post with the appropriate fuse.
87 is the load.
86 is the exciter lead. Can be one of the wires that power either the high or low beam filament. (Yes, you'll need a minimum of two relays.)
85 goes to ground.
Get some of the heavy duty high temp sockets if your planning on running hotter bulbs.
Originally Posted by Kwikkordead
They will melt with those bulbs. Search for "ceramic H4 headlight plug).
I third this. Most of them come in pigtail form too so make sure the wires they come with are of a sufficiently large gauge or you will have melted wires.
Those are basically the same on the inside as the Bosch 40 amp units.
Originally the 70 amp relays were designed for running the AC system on some of the 80's Audi vehicles. Most likely other uses too. They needed to provide power for the electric radiator fan and other high loads. I only recommend them because of their ratings. The challenge is to find the appropriate "flag connectors" for them now. I had trouble with that nearly ten years ago now with certain styles of connectors and it hasn't gotten any better today, it seems.
Here's a link to the place I used to buy them from, but they want to sell you 50 at a time. Not an issue if you're a shop owner. Maybe a deal can be struck with a local shop somewhere in your local. https://www.wurthusa.com/Electrical/...e-8/p/05585266
And now I find this and say: Never mind to all the previous posts. Just go with these relays and build your wiring harness from there. Never seen these before and would have used them for many different uses decades ago had I known. 250 amp continuous duty relay with heavy duty posts that you can build your own wiring harness with heavy enough wire to be a heat sink for those hot 80/100 bulbs. The pictures are taken from the link.
And now I find this and say: Never mind to all the previous posts. Just go with these relays and build your wiring harness from there. Never seen these before and would have used them for many different uses decades ago had I known. 250 amp continuous duty relay with heavy duty posts that you can build your own wiring harness with heavy enough wire to be a heat sink for those hot 80/100 bulbs. https://www.amazon.com/Continuous-Sw...44615955&psc=1
