The ABS warning light on my 94 black 24v is showing up. It used to come up now and again then usually just disappeared after switching the engine on and off. Now it's staying on permanently. I disconnected the negative battery terminal, applied the foot brake, then reconnected, fired up the car, it did seem to go away for a short while but then reappeared.
Any advise? Need to get a new MOT on it but unlikely I'll be able to until I get this sorted.

Also, some rats got into my garage and found them selves a new home in the engine bay, the car starts and fires up and drives fine, apart from the ABS warning light but I dont think it's related. I can't find any damaged wires apart from one. Can anyone tell me what this is please? Its in the top left corner. Thanks in advance for any help at all.
