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[email protected] · December 14th 16, 02:25 PM posted to uk.transport.london

On 14/12/2016 06:41, Basil Jet wrote:
On 2016\12\14 03:14, wrote:
Hello,

I saw on a moving 96ts the other day that one of the rail cars had a
blue light on.

The interesting thing was that the train did not extend its dwell time
beyond what would be normal.

Does the blue light indicate a door fault? I'm guessing, were that the
case, that the line controller ordered the driver to engage the
interlocking. But even if there was a door fault, would not the line
controller have ordered the driver to dump the load?

I saw this train during non-peak hours, BTW.

I think it means it's a de-icing train.

Got it. If it were a door fault, then would the red guard light be flashing?

What about in the case of a passenger alarm?