Thread: Can the fire wall be used as an earth???

Sensational, thanks guys for all the inputs. I definatley don't want any corrosion issues with the fire wall so will buy some more cable and run it to the spot Bundalene suggested.

Matt.

Best practise is that you can ground a battery, cranking or auxiliary battery pretty well anywhere in the engine bay and you are highly unlikely to have a problem.

Once the battery cables have to leave the engine bay then you need to run both a positive and a negative, of the same diameter, form one battery to the other.

Stick to the policy and you shouldn’t have a problem.