Club 80-90 Forums

My T25 headlights are flickering on and off with no ignition also in dash cluster blue headlight led showing i have tried to disconnect main headlight switch is still makes no difference also on headlight stock switch disconnected still same resulting in flat battery 
any ideas to try thanks 
James 

Have you checked the blue flasher-stalk wires,
and contacts in the switch.

Wires -
The wires pass very close to the upper collumn mounting bracket, so I wounder if some rubbing away or damage to the insulation may have occurred - but thinking in my head, that would probably blow a fuse.

Stalk switch -
It may well be that the contacts inside the flasher stalk are either weak and hovering close and arcing.
This is my preferred train of thought.

Unplug the two pin stalk connector to check.

Failing that - have you added a headlight upgrade using relays... the relay may be sticking on.

Sounds like an earth fault feeding through the dash pod perhaps, try unplugging the dash or wiggle the plug , check all the earth connections by the fuse box

I had the same issue turned out to be the Voltage Regulator on the alternator, replaced and all good...

https://www.brickwerks.co.uk/voltage-regulator-alternator-general-use-14-5v.html

Check the spade connectors at the crown earths (next to the fuse box), they heat up and fall apart. This is where the headlights are earthed and could be causing the intermittent flickering.

The blue main beam warning light is fed from one of the headlight main beam circuits. If the bulb is illuminated with headlights off it may be a problem with the dash - it must be getting voltage from another source which will also try to illuminate the main beam bulb and may explain the flat battery problem.