HID headlight installed without hot resistor - 2014+ Jeep Cherokee Forums
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post #1 of 18 (permalink) Old 06-22-2015, 04:04 PM Thread Starter
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HID headlight installed without hot resistor

I posted this update in my last post.

Start this new post just to share my experiment with other members to give you option if you hate to use hot resistor.

So the conclusion is that:
HOT Load resistor is not needed if you use the CANBUS HID Kit from DDM Tuning.

The theory with the load resistor is because the most HID kits use relay which only took a tiny fraction power of the original headlight circuit. This caused the detection circuit fault.

The DDM CANBUS dose not use relay. It power the HID bulb from the original headlight circuit. So the power draw is 35W rated. so no fault signal.

Based on the above theory, as an alternative, if you do not want to use the hot resistor as I , but you have a traditional HID kit. You can modify the tradition HID kit, connect the wire which was designed to battery back to the original headlight wiring with splitter (one to two splitter) and capacitor error corrector. (I did not do this experiment. This is just my guest based on above theory.)


Please try not to use hot resistor. Trust me. I am circuit designer in consumer electronic. It would kill your circuit or cause fire.


Hope this is useful to you members.
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post #2 of 18 (permalink) Old 06-22-2015, 04:10 PM
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Do you mind posting some pics of your DDM's installed?

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post #3 of 18 (permalink) Old 06-22-2015, 04:43 PM
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HID headlight installed without hot resistor

Quote:
Originally Posted by TonyJJJJ View Post
I posted this update in my last post.



Start this new post just to share my experiment with other members to give you option if you hate to use hot resistor.



So the conclusion is that:

HOT Load resistor is not needed if you use the CANBUS HID Kit from DDM Tuning.



The theory with the load resistor is because the most HID kits use relay which only took a tiny fraction power of the original headlight circuit. This caused the detection circuit fault.



The DDM CANBUS dose not use relay. It power the HID bulb from the original headlight circuit. So the power draw is 35W rated. so no fault signal.



Based on the above theory, as an alternative, if you do not want to use the hot resistor as I , but you have a traditional HID kit. You can modify the tradition HID kit, connect the wire which was designed to battery back to the original headlight wiring with splitter (one to two splitter) and capacitor error corrector. (I did not do this experiment. This is just my guest based on above theory.)





Please try not to use hot resistor. Trust me. I am circuit designer in consumer electronic. It would kill your circuit or cause fire.





Hope this is useful to you members.

I'll keep an open mind here. As an electrical engineer and automotive test engineer for the past 35 years, explain to me the problems with using the resistors. Please be specific on where you see the problems.


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Last edited by O|||||||O; 06-22-2015 at 04:47 PM.
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post #4 of 18 (permalink) Old 06-22-2015, 05:46 PM
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^^ Agreed.
Only time it will cause a problem is if you use an underated wattage.

Cheers, Dave.


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post #5 of 18 (permalink) Old 06-22-2015, 05:51 PM
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Quote:
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I'll keep an open mind here. As an electrical engineer and automotive test engineer for the past 35 years, explain to me the problems with using the resistors. Please be specific on where you see the problems.
EE/ME here too. Other than heat / reliability I see no issue... BUT if you can avoid wasting energy, why wouldn't you?
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post #6 of 18 (permalink) Old 06-22-2015, 05:58 PM Thread Starter
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Quote:
Originally Posted by O|||||||O View Post
I'll keep an open mind here. As an electrical engineer and automotive test engineer for the past 35 years, explain to me the problems with using the resistors. Please be specific on where you see the problems.


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@O|||||||O

There is no problem to use resistor. It is just problematic to have a 290F (measured by others members before)hot resistor in the hot chassis. It add uncertainty and reliability issue, reduce life time of other electronics around it.
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post #7 of 18 (permalink) Old 06-22-2015, 06:03 PM Thread Starter
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Do you mind posting some pics of your DDM's installed?
Ha, find the link below to upload images. It is the picture to show the compare after I installed the first HID. On the left, the yellowish one is the original halogen.
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post #8 of 18 (permalink) Old 06-22-2015, 07:59 PM
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Originally Posted by TonyJJJJ View Post
@O|||||||O



There is no problem to use resistor. It is just problematic to have a 290F (measured by others members before)hot resistor in the hot chassis. It add uncertainty and reliability issue, reduce life time of other electronics around it.

What other electronics? The resistors are inside the engine compartment where there is about 10,000-20,000 watts of waste heat being generated. I'm pretty sure my resistors are no running 290 deg. or my paint would be burnt off where they are mounted to the body for sinking heat.


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post #9 of 18 (permalink) Old 06-22-2015, 08:04 PM
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HID headlight installed without hot resistor

This I agree with. If I could have done away with the resistors a year ago I would have. At the time the resistors were the only option. It ain't broke now so I'm just keeping the resistors and wait for LED's.


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Last edited by O|||||||O; 06-22-2015 at 08:07 PM.
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post #10 of 18 (permalink) Old 06-23-2015, 01:49 AM
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Haven't had any issues here either, had my XenonDepot Xtreme HID Kit w/ 6500K bulbs + resistors installed for about a month and a half now, work perfect every single time and haven't had the issue some have where one wont turn on unless you cycle them on/off a couple times... I'm not afraid of the resistors ruining anything as I had a professional do it and its on them...
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