Been reading a lot about this on American forums and found few things to check:
- I'll check the battery terminals for corrosion under the grease.
- seen something called 'The Big 3' which is replacing all the cables from alternator to battery with new larger gauge wire.
- check the pig tail on the alternator for corrosion.
- the wires in the harness from car to tailgate, I did check these but dot know how I would get to them to check all the way along?
I'll start with the pigtail and Battery terminals on Thursday in my day off.