crankshaft
Member
- Joined
- Feb 13, 2017
- Messages
- 129
- Points
- 86
Hey,
So I put a new fog light bulb. But I thought about using an LED one.
It works great, turns on normally as expected, except that it starts rapidily blinking when it's off. It's unrelated with other bulbs being used in the rear lights.
For what I understand the Body Control Unit behind the fuse box power the light bulb directly, and there's no separate fuse or relay for it.
What I am observing is that with the ignition on, the light blinks all the time. With ignition off, light stays blinking for a minute, and then goes off. It starts blinking again for a few seconds, and then goes back off again -- this pattern repeats itself forever. If I open the car, it stays blinking for a minute or so. And then the pattern starts again.
So what I am guessing is that when the Body Control Unit is awake the light blinks, when it's sleeping the light is off. Since the LED needs less power to turn on this is visible with an LED bulb, but not a normal halogen bulb.
Does anyone have any ideas if this is normal? or if something in the Body Control Unit needs a path to ground that doesn't have some other way?
Something like a FET is acting up?
I could just out a resistor and solve this, or use a normal bulb, but I was wondering if someone has seen this behavior, and if it "normal", or an indication that there's something less right with my Control Unit.
EDIT: Can anyone assist me in knowing where is connect in the Body Control Unit the cable that goes to the rear fog light?
So I put a new fog light bulb. But I thought about using an LED one.
It works great, turns on normally as expected, except that it starts rapidily blinking when it's off. It's unrelated with other bulbs being used in the rear lights.
For what I understand the Body Control Unit behind the fuse box power the light bulb directly, and there's no separate fuse or relay for it.
What I am observing is that with the ignition on, the light blinks all the time. With ignition off, light stays blinking for a minute, and then goes off. It starts blinking again for a few seconds, and then goes back off again -- this pattern repeats itself forever. If I open the car, it stays blinking for a minute or so. And then the pattern starts again.
So what I am guessing is that when the Body Control Unit is awake the light blinks, when it's sleeping the light is off. Since the LED needs less power to turn on this is visible with an LED bulb, but not a normal halogen bulb.
Does anyone have any ideas if this is normal? or if something in the Body Control Unit needs a path to ground that doesn't have some other way?
Something like a FET is acting up?
I could just out a resistor and solve this, or use a normal bulb, but I was wondering if someone has seen this behavior, and if it "normal", or an indication that there's something less right with my Control Unit.
EDIT: Can anyone assist me in knowing where is connect in the Body Control Unit the cable that goes to the rear fog light?
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