Head light relay mod write up....WOW what a difference - Page 4 - JeepForum.com
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post #46 of 409 Old 09-07-2012, 09:28 AM
jimmybob67
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Quote:
Originally Posted by TheSmanman

Thanks for the info!
I'm going to order it today. It looks great and when I'm driving around I really can't see my gauges to well, so I'm looking forward to getting the kit.
Did you have to use the install kit?


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post #47 of 409 Old 09-07-2012, 06:36 PM Thread Starter
mudsweatNgearz
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Quote:
Originally Posted by sdotcarter View Post
I called the parts store and they only have one 12v 30 amp relay. Would this be an item radioshack would carry ya think?
Definately radio shack should have em. What I did was do a little shopping on the net and ebay and you can get half a dozen or so for like 10 or 15 dollars (you will pay that for 2 of em at radio shack). Once you start using relays you will like em so much that you will want more anyway so just go ahead and get multiples.

I really do recommend using female sockets with the relays. Or better yet get a relay/fuse power center from the boneyard and do it right....be done with it!


I wondered why the baseball kept getting bigger and bigger....then it hit me!
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post #48 of 409 Old 09-07-2012, 06:43 PM Thread Starter
mudsweatNgearz
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Quote:
Originally Posted by jimmybob67 View Post
Did you have to use the install kit?
Naa, I just used some soapy water in a squirt bottle. A credit card or some other plastic thing will work to smooth the bubbles out.

I wondered why the baseball kept getting bigger and bigger....then it hit me!
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post #49 of 409 Old 09-07-2012, 09:02 PM
cycleguy04
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My TJ lights are looking pretty dim. You've got me wondering if this upgrade will work on a TJ. I'll check the wire gage when I get home.

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post #50 of 409 Old 09-08-2012, 12:03 AM
1sik78cj7
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Gotta try this. I never understood what relays do!

God, guts, guns....without them we have no FREEDOM!
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post #51 of 409 Old 09-08-2012, 01:27 PM
evanjeep
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Quote:
Originally Posted by 1sik78cj7
Gotta try this. I never understood what relays do!
Pretty much like a circuit breaker
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post #52 of 409 Old 09-08-2012, 01:33 PM
HurricaneRZA
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I used this relay mod in conjunction with a couple spare relays so now my KC pencil beams come on with my hi-beams. Great for throwing a lot of lights with only one switch, and for shutting them all off (in the event there's on coming traffic or you just want low-beam).

Quote:
Originally Posted by YoureverydayXJ View Post
This is the most metal thing I have ever heard.
Quote:
Originally Posted by doublins View Post
I always get people coming over and saying things like "I wish I knew how to do that," etc- but they don't realize- at some point I didn't know how to do it either- I had to figure it out.
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post #53 of 409 Old 09-08-2012, 02:06 PM
TheSmanman
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Quote:
Originally Posted by jimmybob67 View Post
Did you have to use the install kit?
No, waiting for it to come in the mail. I didn't order the install kit as it's just a small spray bottle of soapy water and a small squeegee. Simple enough to get this stuff around the house.
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post #54 of 409 Old 09-08-2012, 02:52 PM
1sik78cj7
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Quote:
Originally Posted by evanjeep View Post
Pretty much like a circuit breaker
I thought that was what an in-line fuse was for.

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post #55 of 409 Old 09-08-2012, 04:41 PM
HurricaneRZA
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Quote:
Originally Posted by 1sik78cj7 View Post
I thought that was what an in-line fuse was for.
Yes, but this is also like an automatic switch...

From my understanding of relays. It piggybacks the stock system in a sense.

Stock system:
Flip the switch, 100% power goes through the switch to the lights and through all the long lines of thin cable in between.

Relay system:
Flip the switch, just a trickle of power goes through the switch and stock wires to trigger the relays. The relays flip a switch internally and 100% of the power goes through that with shorter wire (and hopefully thicker), meaning it has a short journey from the battery straight to the lights.

The shorter/thicker wires mean the power can flow through with a lot less resistance, and the lights can pull as much power as they can handle. Thus making them far more effective at doing their job and it takes the strain off of the stock system.

Quote:
Originally Posted by YoureverydayXJ View Post
This is the most metal thing I have ever heard.
Quote:
Originally Posted by doublins View Post
I always get people coming over and saying things like "I wish I knew how to do that," etc- but they don't realize- at some point I didn't know how to do it either- I had to figure it out.
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post #56 of 409 Old 09-08-2012, 09:58 PM
1sik78cj7
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Thanks Hurricane! You explained that really well. It all makes perfect sense now.

God, guts, guns....without them we have no FREEDOM!
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post #57 of 409 Old 09-08-2012, 10:04 PM
HurricaneRZA
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Quote:
Originally Posted by 1sik78cj7 View Post
Thanks Hurricane! You explained that really well. It all makes perfect sense now.
No problem, that's just how I learned how they work If it's wrong someone else can chime in...

Quote:
Originally Posted by YoureverydayXJ View Post
This is the most metal thing I have ever heard.
Quote:
Originally Posted by doublins View Post
I always get people coming over and saying things like "I wish I knew how to do that," etc- but they don't realize- at some point I didn't know how to do it either- I had to figure it out.
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post #58 of 409 Old 09-09-2012, 05:14 AM Thread Starter
mudsweatNgearz
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Quote:
Originally Posted by 1sik78cj7 View Post
I thought that was what an in-line fuse was for.
A relay WILL NOT take the place of an inline fuse. You will still need an inline fuse along with the relay. The relay uses two entirely seperate and independant circuits.
The switching circuit (to activate the relay) requires very little current, a 5 amp fuse is plenty for this. When source power is provided to this circuit it will activate an electromagnet (coil) which will pull a gate toward it (but never touch it) to make contact for the high current circuit and in turn provide source power to whatever you are powering. For the high current circuit you will need to fuse rated for whatever amperage your load will require.

The thing to remember is that they are two seperate circuits. At first relays may seem to be some mysterious little black box that defies understanding. In reality relays are beutifully simple and perform very important jobs. If you are going to add or modify any electrical components on your rig it will pay you handsomely to take a little time and effort on your part to get a grip on understanding relays. There is a treasure trove of information at your fingertips and everything you ever wanted to know about relays can be found in the Google search bar.






For a good basic understanding go here. http://www.autoshop101.com/forms/hweb2.pdf

I wondered why the baseball kept getting bigger and bigger....then it hit me!
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post #59 of 409 Old 09-09-2012, 07:22 AM
jimmybob67
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After looking at my wiring (94YJ) It seems adequate for the amperage draw of a 55 watt bulb. Is this mod for an earlier model?
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post #60 of 409 Old 09-09-2012, 07:41 AM
USMCBuckWild
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I am so doing this.

Great write up. Thanks!
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electrical , h4 , head light , headlight upgrade , relay

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