I changed my tail/stop lights over to LEDs a while ago. I have noted on other threads that I had problems with the front parkers and dash lights coming on when I put my foot on the brakes. This problem is still occurring. Not long after I think I put on a thread about a problem with cruise control and didn't get any resolution with it. It has taken until now to find out what the intermittent problem was. I just did a trip of around 1000km and the CC didn't work at all during that time, much to my frustration. So I go to take it back to Mr Mitsi again as the warranty is running out in April. Guess what? It was working all the way to the Mitsi dealer! Bugger! Ah well the service guy came back and said that it all related to the LEDs that they were either faulty or allowing power to be fed back into the brake circuit effectively telling the CC that the brakes were on so it wouldn't work. Oh! I went away and tested the theory and they were right. Cruise control works with the headlights off and as soon as you turn them on BANG! there goes your CC!
Be warned all. I know that there are those out there with LED tail/stop lights and I would be interested to see if they have experienced the same problem.

Just put a diode in series with the brake lights. :)

Any of the 1N4000 series will do, try a 1N4004, its 1Amp 400Volt (dont worry about that) and is available at dick smith jaycar etc 4 about 50 cents a piece.

Just cut the positive supply to each brake light and join the diode in with the the stripe end towards the light.

1 way current flow only :D

Just put a diode in series with the brake lights. :)

Hmm I second that :D

-> Ground -----LED----- -->|---(Diode) --- 12volt postive

mmmmmmmmmm.....i too have led globes in the tailights and ,yes,my cruise works hardly at all.....some times it will,some times it wont..but it doesnt seem headlight related at all,it doesnt work with the headlights off..mmmm...might take them out tomorrow and change them for stockies and see how it goes...

You wouldn't believe how frustrating it is chasing a problem like that only to find out it was something that YOU put in.

isnt there Relays for Flasher units to suit LED lights you can put in to help? or is this just for the flasher units to make them flash the right time?

Just get the Phillips halogens I have and you wont have a problem

brighter and quicker response + no CC issues = WINNING

Just get the Phillips halogens I have and you wont have a problem

brighter and quicker response + no CC issues = WINNING
do they come in red globes or just clear?

isnt there Relays for Flasher units to suit LED lights you can put in to help? or is this just for the flasher units to make them flash the right time?

As far as i understand,there is no relay as such in the 380,it is all controlled through the ecu/canbus ?

You can use a load resistor for LEDs indicator bulbs as this will load up a flasher circuit and trick to think it got normal lamps instead :)

You can use a load resistor for LEDs indicator bulbs as this will load up a flasher circuit and trick to think it got normal lamps instead :)

tried that and all that happened was the resistor got so damm hot,and the led globes still didnt work...

Did you try the load resistor bulbs or just put a resistor in series? Has anyone actually tried the Diode in series?

If you put the resistor in series with the LEDs lamp it will glow dimly :)

Led lights are also an issue in magnas. Have had tj magnas where things stopnand replace the led wit std and all good again. The inline resistors are only for indicators to get the flasher to load up but be warned the run at 160 deg c.

Diode may assist as the way led works and flows current is vastly different to a conventional bulb but at the end of the day for most cars bulbs work just fine. My ute has a rack of led lights across its ass for the brakes, indicators and reverse. For the brakes i have diodes as i had dash waening lights coming on with them and the indicator the resistors rivited to the chassis to keep them cooler

OK then resistor for indicators and diode for brake/tail lights. Has anyone used a thermistor?

do they come in red globes or just clear?

clear the same as the OEM globe only brighter and faster response in lighting up

where did you get them from?

EBAY UK

I will see if I can find a link

It must be something in the 380s that differ to the magna/verada as I have LED brake lights, albeit expensive ones with 14 side fireing 0.5W M-SMD and 6 front facing SMD. Cruise works with lights on and off. It could also be that I am using a higher powered ones rather than standard LEDs which only contain SMDs and not M-SMDs.

Diode will not work to solve this problem.

What does LED stand for again?

light emitting dipshit ???????

Diode will not work to solve this problem.

What does LED stand for again?
I was sort of questioning that myself unless you have it going the other way, in which case nothing would work would it??

Do a reverse bias check on the LED bulb and you will see why a diode will make a difference.

Do a reverse bias check on the LED bulb and you will see why a diode will make a difference.

Probably a diode of any description, regardless of Vf or Vbr, will not fix the problem.

I suspect it is a current sensing issue.

Probably a diode of any description, regardless of Vf or Vbr, will not fix the problem.

I suspect it is a current sensing issue.

This is why my higer wattage and hence current draw M-SMD VLEDs work.