Thanks for all the replies - although I'm no further forwards with this.
To recap: The lamp worked fine for a week or two but then suddenly went out whilst the loco was running. Diagnosis: something come loose. But nothing is.
There is nothing wrong with the LED (I've tested it).
Don't want to remove the board and hard-wire. Whenever I've tried that before I get all manner of running problems, even though all wired up properly (I have 30 years of experience of wiring up locos and 2 years experience of DCC - so no, it's not me....but I just don't get on with hard wiring.
The problem is obvioously in the tender - as the tender concerned will not operate lights on another 2-8-0 (which work fine with it's own tender attached).
Likewise, the tender from the other 2-8-0 (which operates it's own lights fine) will not work the lights on this one. Therefore it seems there is an additional problem in the loco also.
Now the only thing which can be wrong in the loco is the coonnectors in the ash pan (which I've checked - they're fine), or the LED is wired the wrong way round (it's wired red to positive lead of LED and black to negative lead of LED). All my other Bachmann locos (6) have blue and green wires to the head lamp. This one has red and black.
I can try reversing that and can also change the circuit board (I have a couple of spares). But before I do, does anyone have any fuirther thoughts.?
Thanks - Don Mason (aka Nosamnod)
To recap: The lamp worked fine for a week or two but then suddenly went out whilst the loco was running. Diagnosis: something come loose. But nothing is.
There is nothing wrong with the LED (I've tested it).
Don't want to remove the board and hard-wire. Whenever I've tried that before I get all manner of running problems, even though all wired up properly (I have 30 years of experience of wiring up locos and 2 years experience of DCC - so no, it's not me....but I just don't get on with hard wiring.
The problem is obvioously in the tender - as the tender concerned will not operate lights on another 2-8-0 (which work fine with it's own tender attached).
Likewise, the tender from the other 2-8-0 (which operates it's own lights fine) will not work the lights on this one. Therefore it seems there is an additional problem in the loco also.
Now the only thing which can be wrong in the loco is the coonnectors in the ash pan (which I've checked - they're fine), or the LED is wired the wrong way round (it's wired red to positive lead of LED and black to negative lead of LED). All my other Bachmann locos (6) have blue and green wires to the head lamp. This one has red and black.
I can try reversing that and can also change the circuit board (I have a couple of spares). But before I do, does anyone have any fuirther thoughts.?
Thanks - Don Mason (aka Nosamnod)