I'm wiring up some HID headlights and I need some 3-4 ohm 100watt resistors. Does anyone know where I can find these? Or what I can use as a substitute? Car speakers worked for testing purposes, but they heat up and blow (I now know this ).
Thanks,
Darrell

 

electronic surpluss store should have those.

 

If you cant find 3-4 ohm, do you how to use Ohms law to combine a few to make up exactly what you want?
You can also use larger than 100 watt, but the physical size will also increase.

 

Mexstan,
Just like speakers right? + of one to - of the other should cut resistance in half?
D

 

Not quite like speakers.

For resistors connected in series, the total resistance of the circuit is the sum of the individual resistances.
R = R1 + R2 + R3 + R4 + etc

Resistors connected in parallel are a bit more complex. For only two resistors in parallel the formula is:
R= R1R2 divided by R1+R2
The total resistance is LESS than the that of the LOWEST value of resistance present.
Will not even try to tell you how to calculate three and more resistors in parallel

 

Radio Shack

 

Why do you need 100w resistors?
The Front Control Module just needs to see a load, a 15-25w should be plenty. A 5w may even work.

MikeyB

 

Those are large ceramic covered resistors that will heat up if you are going to put them in series to the lamps. You have to put them out in the open where they don't touch anything and a lot of air circulates over them. The vibrations from the engine and road will shorten their lives considerably.
You need an electronic circuit that does current limiting instead of the large resistors to have a durable installation.

 

Okay then, this is good info. I need to show some sort of load for my HID's to work. Without a load they just sit there and blink. Radio shack doesn't have any resistors large enough for this application. And I'm no electronics genious. Does anyone know how I can fool my headlights?
Thanks again to all.
Darrell

 

Why couldn't the selaer re-program the light control module for less load?

It couldn't be this easy!

 

If you connect them to the high beam circuit you wont need a resistor. That is how i have mine hooked up.

 

I believe youare going to need to go to a more wholesale setup than Radio Shack. That is why I haven't got mine yet, I have to wait untill I am near a good distributer. I wouldn't personally try smaler resistors, those values were posted on another site in the middle of a 20 page thread and the guy seemed to know what he was talking about. I would think you would overburden and cook small ones. Let us know if you find an alternative.

 

Here some resistors for anyone looking to put HID's in your Ram. I just got me a set for $32.95.

http://cgi.ebay.com/ebaymotors/Load-...QQcmdZViewItem

Mike

 

I get mine from Radio Shack

 

I think I seen some the other day at AutoZone. They are close to where the LED lights are. Because I had to do the same thing when I put my RED led bulbs in the front.