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Discussion Starter #1
ALL,

I know that I have to install a load resistor to get my cruise to work again after installing LED 194s in the 3rd brake light. Installed a 50 ohm resistor and the cruise still does not work. Do I need higher resistance? I do not like the idea of going back to incandescent bulbs. Any suggestions or help is appreciated.

v/r,

2003FordFocusZX3
 

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Thats What She Said
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Not sure what everyone else has an issue with. I have used the following LED's on mine.

Yorkim T10 194 LED Bulbs 6500K Non Polarity 6th Generation for Car Interior Lights, LED Plate Light, Turn Signal Lights and Corner Lights - W5W 168 2825 T10 194 Wedge LED Bulb, Pack of 10 - White https://www.amazon.com/dp/B00MAG6RMM/ref=cm_sw_r_cp_apa_i_RrbIDbKVGJRKX

A 2001 ZX3 and a 2004 SVT. Installed these bilbs Nad nothing else and have never had an issue with cruise control working.
 

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Discussion Starter #3
Magus2727,

These are the ones I got. They are polarity sensitive.

12V T10 LED Bulb,194 LED Bulb, 168 LED Bulb, 2825 W5W LED Bulbs, Super Bright 6000K White 10SMD 5730 Chipset 250LM LED Bulb for Car Interior Dome Map Door Courtesy License Plate Lights

Specification: T10 LED Bulb with 10smd 5730 chipset, 250 Lumens, 360 degree beam angle, 6000k Xenon white. Size: 1.03”L*0.45”W*0.45”H inch, Socket width: 0.35”, Voltage: 12V, Power: 3W

I just need to know if 50 ohms is enough resistance for a circuit that used to have 5 incandescent bulbs int it. Thanks for the information.

v/r,

2003FordFocusZX3
 

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Wonder if the issues is with the polarity and the cruise control...

For load well 12^2/50 is only 2.88 watts. so....

Voltage = I (current) x R (resistance); Power = I x V so, power also = (V^2)/R

T10 incondecent ligts are 5 watts each. 5 x 5 = 25 watts. you are now running 3 watt led's so 5x3 =15 you need 10 watts in a resistor.

10=12^2/R so R needs to be 14.4 ohms. or a combination of resitors to make that.

So I would say try spending the few dollars and get the bulbs i recomended and not worry about any silly resistors.
 

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Discussion Starter #5
Magus2727,

Ordered the bulbs from Amazon. Will know Thursday evening if this fixes the problem with cruise. Wish me luck.

v/r,

2003FordFocusZX3
 

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Wishing you luck. I did not have any issues with cruise control after using those bulbs in both my 2001 ZX3 or my 2004 SVT. So unless I have picked the sweet spots for it to work it should have no issues... Or you have other problems? Not sure, but good luck!
 

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Discussion Starter #7
Magus2727,

No joy with the no cruise situation. Got the new bulbs and installed them. Checked the circuit, good lights. Road test and cruise is still missing. What next?

v/r,

2003FordFocusZX3
 

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Magus2727,

No joy with the no cruise situation. Got the new bulbs and installed them. Checked the circuit, good lights. Road test and cruise is still missing. What next?

v/r,

2003FordFocusZX3
If you go back to standard bulbs does it work? Did something else brake?
 

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Discussion Starter #9
Magus2727,

I will try and get some incandescent bulbs and try it. This sucks...

v/r,

2003FordFocusZX3
 

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Also there is a sensor under the brake pedal is that connected and working? I have had that fall off a few times and it will cause the CC to not work.
 

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Discussion Starter #11
Magus2727,

I put the 5 incandescent 194 bulbs in the 3rd brake light and cruise is back. How much resistance do I need to make the LED bulbs work? I read that a 194 incandescent bulb is 52 ohms. Does this mean i need 260 ohms of resistance to make this damn thing work?

v/r,

2003FordFocusZX3
 

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I gave you the answer above....
 

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Discussion Starter #13
To all Focus Fanatics,

With Help from Magus2727, I have LED 3rd brake lights and cruise control. I installed a 15 ohm, 50 watt resistor and five LED bulbs.

The bulbs are:

Yorkim T10 194 LED Bulbs 6500K Non Polarity 6th Generation for Car Interior Lights, LED Plate Light, Turn Signal Lights and Corner Lights – W5W 168 2825 T10 194 Wedge LED Bulb, Pack of 10 - White

The resistor is:

Cutequeen 2PCS 50W Watt 15 Ohm Aluminum Case Wirewound Chassis Mounted Resistor (Pack of 2)

v/r,

2003FordFocusZX3
 

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Glad you got it working. I must have magical Foci becuase my 2001 ZX3 and 2004 SVT both have LED's 3rd brake lights with no extra load resistor.

Glad you got it working. Note that those resistors are only rated at 50 watts when heat sunk to a metal base plate. if its just floating or loose somewhere in the hatch wiring it will get hot and can cause a hazard. please make sure you bolt/screw it down to a metal surface.
 
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