I had the same dramas with my 34. I cleaned up as many earths as I could find and I also checked the charge at the battery and it was charging at 12.7 volts. I checked it at the alternator and it was 14.5 where It should be. I made a cable to connect the power terminal on the alternator the the positive battery terminal and it has fixed the problem. I used 8mm wire and some large crimp terminals. I'm sure your local auto electrician could make this up for cheap. Hope it helps.