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  #13  
Old 01-06-2014, 07:05 PM
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Re: Resistors vs led electronic flashers??

From my understanding, there is no individual flasher unit. All the indicator flashing is controlled by the BCM (Body Control Module) and cannot be changed to accommodate LED turn signals. The only way I have seen, is to use the resistors to trick the BCM into thinking that the standard globe is being used.

Being the car is CANBus, you need to be very careful not to upset the electronics of the car. Gone are the old school days of just replacing the flasher can to a LED compatible unit.

The resistor method is the only simple way of achieving a normal operation of LED turn signals.

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  #14  
Old 08-24-2014, 10:36 AM
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Re: Resistors vs led electronic flashers??

I was also very 'disappointed' that the 2014 JGC had LEDs everywhere except the rear. I have changed to LED reverse and turn indicators. The indicators do require load resistors to stop the hyperflash.

My initial ebay purchase provided some useless dull lights that we much dimmer than the factory bulbs. I have now purchased some amber LEDS to be proud of. The 30W LED units are a bit brighter than the factory bulbs. They draw 400mA (4.8W) and with 8 ohm/50W resistors, they match the factory bulbs specs (22W).

I have attached a video with the 30W LED on the left and the factory bulb on the right.
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  #15  
Old 09-27-2016, 01:59 PM
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Re: Resistors vs led electronic flashers??

Quote:
Originally Posted by Mozzie View Post
I was also very 'disappointed' that the 2014 JGC had LEDs everywhere except the rear. I have changed to LED reverse and turn indicators. The indicators do require load resistors to stop the hyperflash.

My initial ebay purchase provided some useless dull lights that we much dimmer than the factory bulbs. I have now purchased some amber LEDS to be proud of. The 30W LED units are a bit brighter than the factory bulbs. They draw 400mA (4.8W) and with 8 ohm/50W resistors, they match the factory bulbs specs (22W).

I have attached a video with the 30W LED on the left and the factory bulb on the right.
We need to figure out how to reprogram the BCM to allow the turn signals to flash amber under the brake lights, and have the red lights be dedicated to the brakes....

Jealous of the non-US models with this feature...
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Old 09-27-2016, 02:19 PM
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Re: Resistors vs led electronic flashers??

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Originally Posted by DrSpeed View Post
We need to figure out how to reprogram the BCM to allow the turn signals to flash amber under the brake lights, and have the red lights be dedicated to the brakes....

Jealous of the non-US models with this feature...
Well I learned something today. So US models have reverse lights on the bottom row of the lights? Where the non us models have half turn signal, half reverse light on bottom? Interesting.
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Old 09-27-2016, 02:24 PM
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Re: Resistors vs led electronic flashers??

'JeepNut, keep in mind that everything is computer controlled in current generation JGC, so "centralizing" load resistors isn't quite that simple. Things like traditional "flashers" are a thing of the past The load resistors are to make up for the fact that the computer cannot detect most LEDs properly on flashing circuits and thinks they are 'burnt out', resulting in hyper-flashing.
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  #18  
Old 09-28-2016, 04:14 PM
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Re: Resistors vs led electronic flashers??

Quote:
Originally Posted by TheJeepNut View Post
I installed front LED's for the signal/park bulb (3157 types) a while back and they work fine with the resistors, but those things get WAY hot after the parking lights are illuminated for just a few minutes.
Edited the original post...

#1 - for the front marker/turn signal bulbs, you should only have to wire the ballast resistor onto the turn circuit. Wiring the resistor on the marker circuit is a waste of time/effort.

Even then the resistor will get hot, that's what it does. Best to bolt it to a metal pinch weld somewhere.

#2 - as others have pointed out, a lot of modern vehicles no longer use flasher relays (mechanical or electronic). The turn signal flashing is handled by the main computer (not the engine computer).

I personally believe that a lot of manufacturers are simply to lazy/cheap to program their BCM (body control module) to function with LED turn signals as standard/OEM versus LEDs.

LEDs as turn signals (and brake and marker) would be MUCH more efficient and last longer... But then they wouldn't make any money off replacing the cheap/ancient incandescent bulbs. Especially when you have to spend more than an hour taking off body panels just to replace said cheap/incandescent bulbs (don't even get me started on the headlights for a Subaru Legacy).

The wife wanted to test drive a new Lincoln MKX.
First thing I looked at was how easy it would be to get at the headlights and front turn signals. Nice and easy. The rest of the lights on the vehicle are all LED. Guess what's sitting in the garage next to my Jeep?
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