Re: Lighting query (Transport) - Been There - Done That !

Gentlemen,

I have done this very thing for a major UK truck lighting supplier and it
wasn't easy. You're on the right lines about switching a dummy load in - BUT
you have to do it at the right time ! Different manufacturers use different
schemes - some single tests and some multiple tests and you have to find out
who does what and when they do it ?

I am not at liberty to 'reveal all' but please be assured it is possible. I
think another UK supplier has a smart electronic load available as an add on
for those using LED lighting. Will look up my notes and post link.




"CWatters" <colin.watters@xxxxxxxxxxxxx> wrote in message
news:GECYe.2023$Tx1.131201@xxxxxxxxxxxxxxxxxxxxxxxx
>
> "CWatters" <colin.watters@xxxxxxxxxxxxx> wrote in message
> news:SCCYe.2021$_r1.91226@xxxxxxxxxxxxxxxxxxxxxxxx
>>
>> " Geocacher" <gps@xxxxxxxx> wrote in message
>> news:dgu6ii$g2n$1@xxxxxxxxxxxxxxxxxxxxx
>> > I work in the trailer manufacturing business.
>> > We use LED tail-light clusters.
>> > The modern truck/tractors utilise a computer system to perform
> diagnostics
>> > on various systems within the rig. One of these is the lighting system.
>> > A pulse is sent to each tail light, the system monitoring the current.
> If
>> > there is current flow, it is assumed the incandescent globes are OK.
>>
>> One solution might be to fit a large capcitor in parallel with the LEDs.
>> That might work if the test pulse is short enough.
>>
>
> or you could build a circuit that detects the test pulse and switches in a
> dummy load briefly.
>
>


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