Led Lights Fitted Now Get Brake Light Failure Warn

[buster]

ghead

[Gkamysz]

I thought this would be a problem with these cars? The system reads the resistance or current through the bulbs normally. LED's would not give the proper reading. Adding a resistor across the terminals should fix it but why didn't the LED brake light manufacturer think of that?

Greg

[buster]

Originally posted by Gkamysz@May 6 2005, 11:51 AM
I thought this would be a problem with these cars? The system reads the resistance or current through the bulbs normally. LED's would not give the proper reading. Adding a resistor across the terminals should fix it but why didn't the LED brake light manufacturer think of that?

Greg

[snapback]341507[/snapback]

thanks greg I will try that
buster

[Gkamysz]

Be careful with this, too low resistance will burn fuses, while too small just won't cheat the computer. The wattage rating seems to be about 20W so this means a 7 Ohm resistor would do the trick. I personally would try the highest value resistor that still tricks the OBC.

Greg

[buster]

Hi greg tried 7ohms 10ohms &12 ohms no joy do I need to reset anything like disconnecting the battery?

[drz]

Don't disconnect the battery. The computer reacts when it notices a change. You can always just measure the resistance across the terminals of your stock lights while unplugged (or just across the bulb, I guess would work) and use a resistor that has a similar value. I would keep going down in resistance, but don;t take that as meaning that you should.

[sabbath130]

Originally posted by drz328i@Jul 25 2005, 12:48 PM
Don't disconnect the battery. The computer reacts when it notices a change. You can always just measure the resistance across the terminals of your stock lights while unplugged (or just across the bulb, I guess would work) and use a resistor that has a similar value. I would keep going down in resistance, but don;t take that as meaning that you should.

[snapback]365042[/snapback]

yoou could use a potentiometer.. a variable resistor...