Was about to make the DIY earthing kit you hear about for imprezas but when i went to check the resistance between the negative on the battery to the manifold/struts/alternator they were all 0.01, so pointless adding more earths here.

The reason i was going to do this, when i'm driving, have lights on and then indicate, my dash lights dim somewhat (aint got upgraded soundsystem yet) and it's winding me up, so the next 'easy' earth problem maybe the fusebox itself, now i aint taken the dash off to havea proper look about, but can somebody tell me where/how the fusebox is earthed?

Aaron

 

It won't be, as is, since it simply carries current through circuit breakers to prevent overload.

Try one from the inside bulkhead to earth, mine is bolted under the ecu mountings.