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Old 08-09-2004, 11:57 PM   #1
ubshtoopid
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Default Wiring Hella 500's?

I have been reading some of the posts on how to wire Hella 500's to work with the stock fog light switch. This may be a really dumb question, but is it possible to just connect the two existing wires from the stock fog light plug to the Hella's and have the Hella's work properly? If this is not possible could someone breifly explain to me why it would not work. I want to wire my lights in the easiest way possible so that they will work with the factory foglight switch. By the way, the car is a MY00 Impreza RS if that helps any.
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Old 08-10-2004, 12:56 AM   #2
tooocool49723
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no, too little power. Hellas take a LOT of power to run, and wiring them in parallel to the stock ones would make all of them dimmer, wiring in series would make them progressivly dimmer from one to the next, and either way would blow out the fuse.

Basically, you need to wire in a relay. This takes the signal from the stock switch, and makes it into another switch for the Hella's, which you could run straight from the battery/chassis. Many wal-mart style aftermarket fogs are wired like this (with a seprate switch). The relay provides this seprate switch, while still using the stock one.

http://electronics.howstuffworks.com/relay.htm
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Old 08-10-2004, 10:29 AM   #3
PARANOID56
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Ok, donít listen to the guy above
You CAN use the stock wiring, as it does use a relay system. The hella 500 are 50w lights, just like the stock fog lights. You will need the fog light switch, the Subaru relay (goes under the dash) and just plug in the fog lights into the stock wiring.
If you want, you can upgrade the wiring system, which will make the hellas be brighter (as they will receive more volts) but its not necessary.
Have fun.
Shane
www.paranoidfabrications.com
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Old 08-10-2004, 10:54 AM   #4
kingsubi
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I second Shane. It is not until you are running higher than a 50w bulb that you should consider going to a second relay - this is mainly due to wire thickness = voltage drop = low light
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Old 08-10-2004, 11:30 AM   #5
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oh... damnit, just realized what your asking and not what i want to do, lol. Your replacing the stock ones aren't you? I thought you were gonna run an EXTRA set of fogs along with the stock ones! (hits head on wall) sorry, he's right!
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Old 08-10-2004, 01:37 PM   #6
PARANOID56
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yea, when i upgraded my wireing to 12ga with a relay right at the battery i saw a difference in light output, it was brighter. so, if you ever do want to up the watts on the bulb, then upgrade the wiring, i run ion 85w bulbs in my 500s and they are damn bright.
Shane
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Old 08-10-2004, 06:17 PM   #7
ubshtoopid
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Yes, I am just replacing my stock fogs with the Hella's. One of my stock lights is broken, so it was more cost efficient to buy the new set of Hella's.

If it decide not to use the stock wiring I would just want to wire the lights as the directions say, but instead of using the supplied switch I should use the power wire from my Subaru switch to activate the relay? I think that makes sense, but I could be wrong.

Thanks for your help!
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Old 08-10-2004, 06:24 PM   #8
PARANOID56
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if you already had the stock fog lights in, just take them out, and put in the new 500s, you might have to splice the wiring at teh light, but thats it. you mind as well just use the stock wiring for the stock hellas. it would be a super easy install. just get your self a light bracket (like www.kartboy.com has) and you could install it in less then 20min.
Shane
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Old 08-10-2004, 08:22 PM   #9
ubshtoopid
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Thanks!

I ordered brackets from rallylights.com. Hopefully they're of decent quality. I haven't seen any pictures of them but they were a little cheaper than the kartboys ones, and I was able to order the lights at the same time. Hopefully they will be here tomorrow and maybe tomorrow night I can have two working fog lights for the first time in the year I have owned my car.
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Old 08-12-2004, 12:06 AM   #10
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I have the Kartboy fog mounts and 500s in my TS. The fog mounts make most of the mounting job easy, though the 500s are a wee bit of a pain to aim properly and tighten down.

Make sure you get the Hella clear fog protectors - one of my 500s was smashed within two weeks of install, but have been fine since I got the protectors.

I had a friend help with the wiring, though it was simple if you know what you're doing - just cut the ends of the stock wiring and splice away.

Best o luck. The 500s are quite a bit more bright than the standard WRX units, even at 50w.
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Old 08-30-2004, 12:54 AM   #11
gharari
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pics? I want to do this too for my 05 RS if it is cheaper or better than buying the stock fog lights from the dealer. Anyone looked at PIAA lights?
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Old 08-30-2004, 10:41 AM   #12
PARANOID56
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well, your 05 uses a lot smaller fog light. the bug eye can use the 6" lights not the 05 (unless the saw zaw is your friend ).
Shane
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Old 08-30-2004, 10:55 AM   #13
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Rather than splice a bunch of wire, why not run the foglights on their own circut to the battery and wire the relay to the switch. Not only will the lights operate with the power they are meant to have, you will have a much easier time wiring it up. Going back to stock when you trade the car in will also be easier. And you'll have an unmolested Hella set that you can sell to anyone. Granted you're doing this for a broken lens, but if you're doing it, you may as well do it right.

If you do set it up on the stock circut, make sure you have a few 15A fuses, just in case.
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Old 08-30-2004, 12:33 PM   #14
PARANOID56
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why? if you use the hella 500s in stock form, they will not pull any more curent then the stock set up. they will still draw about 8.33 amps.
Shane
Quote:
Originally Posted by Yotsuya
If you do set it up on the stock circut, make sure you have a few 15A fuses, just in case.
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