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Unread 07-02-2011, 05:11 PM   #1
whitejeep2010
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Install LED Turn Signals

Can anyone direct me to specific instructions on how to install the load resistors for my led turn lights on my JK? The instructions that came with them are not model specific.

Thanks,

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Unread 07-02-2011, 05:21 PM   #2
RockyClymer
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Load resistors typically go in series with the wiring as LEDs do not offer enough resistance to the TIPM which will think something is awry with the system. Series resistors will add in the needed resistance so that the TIPM thinks everything is OK.
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Unread 07-02-2011, 05:29 PM   #3
whitejeep2010
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Maybe I am missing something, or I was not clear in my post. I understand what they do, and I am looking for instructions on how to install a set that I purchased. The instructions that came with them are not specific to my vehicle (a 2010 wrangler). Thanks.
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Unread 07-02-2011, 05:45 PM   #4
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You worded it and RockyC explained it fairly well. In series means in the current path. So, when you replace the stock ones, place the resistor on one side of the wire or the other.







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Unread 07-02-2011, 05:55 PM   #5
whitejeep2010
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I have to betray my ignorance of all things electrical. I probably need it drawn in crayon.

If anyone has a picture of what the install looks like, that would be great; if anyone cares to explain what "in the current path" means, that would be welcome as well. I installed them at each location (IE, at each front blinker and at each rear blinker) and I am still getting speedy flashing.
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Unread 07-02-2011, 06:01 PM   #6
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Blinker rear, yellow white is left rear white is right rear, black is ground. You will need the load placed in the yellow-white wire for the left rear, and the white wire for the right rear.


----yellow/white wire----resistor----yellow/white wire----connector to light.

Same for the white wire.
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Unread 07-02-2011, 06:20 PM   #7
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And what about the front?
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Unread 07-02-2011, 06:23 PM   #8
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Rigs' not handy. So I cannot check on it right now.




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Unread 07-02-2011, 09:03 PM   #9
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The way I understand the way the failed light sensors function is it measures current flow. If you wire a resistor in series with the LED it will lower the voltage going to the LED; while it WILL show a current as seen by the sensor the lower voltage will affect the LED output. The shunt resistor should be placed in parallel with the LED. This way the voltage will remain the same through the two parallel portions of the circuit with most of the current flowing through the shunt resistor.

If you deduce the resistance of the LED unit then you can determine the needed value of the parallel resistor. Ohm's Law is E=IR where E=voltage, I = current (amps), and R=resistance. The formula for parallel circuits use:
R(c) = 1/((1/R1)+(1/R2)) where R(c) = resistance of the whole circuit, R1 is the LED resistance (it has to be calculated), and R2 is the Shunt resistor.
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Unread 07-03-2011, 06:27 AM   #10
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Quote:
Originally Posted by whitejeep2010 View Post
Can anyone direct me to specific instructions on how to install the load resistors for my led turn lights on my JK? The instructions that came with them are not model specific.

Thanks,
Resistors waste power. Just run more LEDs for the signal!

Or light ThunderFoot said you just have to wire the resistor parallel to the signal light and all is good from then on.
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Unread 07-03-2011, 08:50 AM   #11
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Quote:
Originally Posted by whitejeep2010 View Post
Maybe I am missing something, or I was not clear in my post. I understand what they do, and I am looking for instructions on how to install a set that I purchased. The instructions that came with them are not specific to my vehicle (a 2010 wrangler). Thanks.

You were very clear in your post!!

Simple way is to use a "Test Light" from any auto parts store. Very inexpensive and handy tool to have around. Turn on your left blinker and at the turn signal find which wire is blinking. Install the resister on that wire. Do the same for the other side.

You must cut the wire to install the resistor, you can not just piggy back it.
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Unread 07-05-2011, 05:18 PM   #12
whitejeep2010
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To make this easier for yours truly, I have uploaded some pics to show what I have done. Hoping that I can receive some correction and get this done right.

Driver's side rear

http://imageshack.us/photo/my-images/813/photo4cs.jpg/

Driver's side front

http://imageshack.us/photo/my-images/838/photo3yl.jpg/

Passenger side rear

http://imageshack.us/photo/my-images/69/photo2viys.jpg/

I figure is someone can direct me on these, I can figure the 3rd one out.
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Unread 07-05-2011, 05:47 PM   #13
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as nwbronco stated above, looks like the yellow/white wire is the blinker. So cut it into, then place the resistor in between the cut. Look at his explanation again. That's what I meant in my post by you must cut the wire and not just piggy back it. Electricity is like water, it will take the path of least resistance. So you ,must cut the wire and use the resistor to connect the wire back together.
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Unread 07-05-2011, 05:47 PM   #14
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Originally Posted by whitejeep2010 View Post
And what about the front?
Should only need to add resistor to either front or rear - once the resistance is there the flasher will work and flash the whole system.

Of course that said - on my 57 I replaced the flasher unit with an electronic that flashes at same speed regardless of load! ergo NO resistors installed inline.
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Unread 07-05-2011, 05:52 PM   #15
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Originally Posted by jwmbishop View Post
Should only need to add resistor to either front or rear - once the resistance is there the flasher will work and flash the whole system.

Of course that said - on my 57 I replaced the flasher unit with an electronic that flashes regardless of load! ergo NO resistors installed inline.

I have seen some of the Mopar vehicles require resistors front and rear.
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