In the 'Coffin' - Cupboard to left of toilet door: TCA Indicator lights, no 1 end and no2 end.
Blue - operative under normal conditions with both TCAs working
Red - Fault lights for TCA 1 or 2 or both.
Rulebook: Do not leave TMD with a defective TCA.
Rulebook: Starting a journey from other than a TMD: Must be a working TCA on either of a 2 car train. Or for greater than 2 cars, must be a working TCA in one of the front 2 cars AND one of the rear 2 cars.
Rulebook: Outside that, advise control via signaller who may give their authority to continue. Act on instructions. Normal Speed. Sound horn and proceed at caution over AHBC