The indicator relay went on my car so i had it replaced and since the new one has been fitted my abs light comes on when I brake, the headlight light on the dash comes on when I brake if I have my lights on the brake lights are on all the time and my glow plug light is flashing. Could it be the relay that's causing the problem or is it a wiring problem? I didn't have any problems before the relay was changed. The car has just been serviced and passed it's mot

Hi Steph .... welcome to the Forum

I would say at first thought it could be an incorrect bulb fitted which is backfeeding the lighting system.

If a two pole bulb is fitted instead of a one pole bulb (2 contacts rather than 1) then this could be the reason.

Have any bulbs been recently changed?

Check the Brake Light bulbs and indicator bulbs at the rear as this is usually the culprit responsible for this type of problem

Let us know how you get on with it