Td5 handbrake light

Hi Everyone.
Wondering if anyone can help in regards to td5 04 model 110 with abs.
Bit of background- I assume that my defender had the 3 amigos at some point as the tc and abs light do not come on with ignition. I am unsure how a previous owner got the lights to go off? Wires at module look factory and untampered. A problem for another day but i assume the handbrake light remains on due to this.

I have been trying to get the handbrake light to function normally in meantime ( see my little diagram).

When car is on key position 2 (not started) the handbrake light will come on and then go off or stay on depending on the handbrake switch as per normal. Upon starting car it stays on permanantly. Cutting wire at position a or b will make the light stay on permanently on position 2 or started and joining a directly to c has same effect. I assume there is some funky wiring in instrument cluster to allow this. Wondering if anyone has come across similar thing?

Thankyou sam.

Is your brake master cylinder level ok or a little low, as pads wear the level will drop, this may be why the light is on.
Also check that the level switch is working ok.

Scooby22 said:

Is your brake master cylinder level ok or a little low, as pads wear the level will drop, this may be why the light is on.
Also check that the level switch is working ok.

Click to expand...

Thx scooby yes i have eliminated the handbrake switch and lvl switch as error points i can do this by looking at the light when key to position 2 and light comes on by manipulating the brake fluid switch or handbrake. Fluid is correct and have disconnected the fluid sensor completely anyway as it cannot provide me with any information as is.. The lvl switch provides circuit to earth so light comes on, as does the handbrake switch. The problem occurs when engine is started.. The confusing part is breaking the abs wire makes light come on permanently which means it is not a simple earth wire like the other two and may possibly carry a positive feed under certain conditions

this may help

Try cleaning and testing the ABS relay under drivers seat, CO508
https://www.lrworkshop.com/connectors/defender-2002my/C0508
https://www.lrworkshop.com/electrics/defender-2002my/anti-lock-braking-system-abs