Datatool alarm tell tail LED dim?

Datatool series 2 alarm telltale LED is very faint,
I thought it was not working at all but in the dark its there flashing JUST.
That after replacing the LED itself.

Voltage getting up there but no current.
Full 11+ volts open circuit but voltage drops away
if LED in circuit.

The unit is tucked away in the tail section of a BMW K1100RS.
and a fag to get out although on a single big plug.

Any BRIGHT ideas?

Garry
Manchester
UK

 

Not clear what you did or are trying to do??
Do you have a resistor in series with the LED? If not the LED will act
almost like a dead short and probably burn out. Or maybe you replaced with
the wrong LED, they are not all the same. The resistor has to be chosen
specifically based on voltage present and nominal current draw of the
particular LED.
Kevin