LED Brake light issue

[Guest]

Hi all,

Just put some LED brake/ tail light bulbs in the rug and when I put the tail lights on they light up as though under brake? Put my foot on the brake pedal, no change.. Any ideas? Works normally with the old bulbs.

[Kingbrown]

Is it possible that the contacts on the new bulbs are in the wrong spot or have been wired incorrectly ?

I would compare the contacts on new vs the old (relative to the bayonet lugs) and also apply voltage to the new lamps to see if both the brake lamp and tail lamp led's function as expected.

The metal (body) part is the common (negative) connection.

I'm assuming these led's are replacing P21/5W bayonet lamps.

[BruceandBobbi]

If they are bayonet the pins are offset. Make sure the bulbs are in the correct way in the slots.

If they are a wedge fitting reverse them. A lot of LEDs are one way current.

[Morville]

I suggest checking the earth connection, a faulty earth can cause odd issues like that.
Peter

[Guest]

Yeah good point raised by all.. I'll suss out all the above and let you know how I get on.

[Guest]

OK so when the key is off, I can turn the parkers on and press the brake and they light up. As soon as the key is on they brake lights stay on? Weird...haven't pulled the globes out yet, just came across that now... Starting the troubleshoot process!!

[Guest]

Alright! Problem solved! So just for future reference and in case it hasn't been mentioned on here beforehand, firstly, I stuffed up. The LED globes I purchased were BAY15D. The globes I should've purchased were the BA15D. The BAY15D globes aren't compatible with the Pajero. Better explained here.

http://www.bulbamerica.com/pages/what-is-the-difference-between-a-ba15d-base-and-a-bay15d-base1157

Thanks for all the tips! 😃