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#1 kpf1grandprix

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Posted 23 May 2019 - 04:21 PM

What would cause a residual current through door courtesy light? It’s dim but then brightens when door opens , I’m thinking pins

#2 kpf1grandprix

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Posted 23 May 2019 - 04:27 PM

If pins is answer does anyone know from what Vauxhall these were borrowed from.
And I’ll need to drill out screws is this doable. ( don’t know what’s behind etc,or screwed into)

#3 Johnboyhgt

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Posted 23 May 2019 - 04:32 PM

Has it got an led bulb in ?

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#4 kpf1grandprix

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Posted 23 May 2019 - 04:39 PM

Has it got an led bulb in ?

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Yeh someone changed the bulbs in the brace bar for leds

#5 Johnboyhgt

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Posted 23 May 2019 - 04:40 PM

That'll be it. Change for normal bulbs.

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#6 kpf1grandprix

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Posted 23 May 2019 - 04:45 PM

Ah bugger ,, ok cheers.
Have to rig up a separate courtesy light next to brace. Don’t fancy tryna rewire the brace

#7 Foxy

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Posted 23 May 2019 - 08:25 PM

The standard bulb is shit, whoever fitted the LEDs did it for a reason...I suspect there is an easy way to sort it.

#8 CocoPops

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Posted 23 May 2019 - 08:31 PM

Problem is residual from the alarm to sense the doors opening.

Like a capacitor....

#9 kpf1grandprix

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Posted 23 May 2019 - 09:32 PM

The standard bulb is sh*t, whoever fitted the LEDs did it for a reason...I suspect there is an easy way to sort it.


Yeh the on off part works fine. Just the courtesy light bit causes the prob.and it is brighter

#10 kpf1grandprix

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Posted 23 May 2019 - 09:33 PM

Problem is residual from the alarm to sense the doors opening.

Like a capacitor....


I was wondering about a capacitor/ resistor type thing.
Anyone know what I’d need?

#11 Talk-torque

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Posted 24 May 2019 - 05:52 AM

A canbus friendly led might function normally. Been meaning to try one, but never got round to it. 😬

#12 slindborg

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Posted 24 May 2019 - 07:01 AM

Basically you need to put some LED's in that are of a higher draw than presently fitted. The small issue is as LED's have got better, their current draw has dropped too :lol:

 

You "may" get away with dropping something like a 1K resistor in parallel to the light, just to add to the current draw and ground the Alarm pin better.



#13 ayresyy

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Posted 24 May 2019 - 07:02 AM

  It's an issue caused by the lack of internal resistance of the LED bulb replacement. When I fitted LED's, I just used a couple of small blocking diodes wired in series with the LED to add a little resistance to the circuit, this appears to have stopped the issue. I think (please correct me if this is not the case?) a CANBUS compatible LED would simply add resistance in parallel to the LED, so I am unsure if this would help, you would also then lose the low power consumption benefits of the LED.



#14 slindborg

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Posted 24 May 2019 - 08:06 AM

ARGHHHH its just CAN :P



#15 Notalotus

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Posted 25 May 2019 - 07:55 PM

I'm guessing a little here, but I assume the sense voltage from the alarm will be around 5-6 volts, and the feed to the led is 12 volts. So when the door is closed and the pin contacts open (not connecting to ground), the led will see a potential difference of around 6-7 volts, thus they are very dim.
I believe that a led designed to run on 12 volts will probably not light at all below maybe 4-5 volts, so a resistor able to drop the feed by about 2 volts when under load should do the trick without dimming it when the door is open. A simple sum would give the resister value.

#16 GiGo

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Posted 26 May 2019 - 05:30 PM

I believe one of these will do the trick; https://uk.farnell.c...ewound resistor

 

Another member used this when they changed to an LED bulb, the problem IS the LED draws less current than the original bulb.



#17 kpf1grandprix

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Posted 26 May 2019 - 06:04 PM

Cheers




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