My truck is a '85 FJ60/62 crossover (Aussie), it has the 3F carburetor engine but the circular headlamps... Anyway, it is pretty much standard on the electrics front, except for a pre-made wiring loom I fitted for the headlamp relays, bought from ARB.
The trouble is I have blown 4 alternators in 5 years - I have no idea how the old the first was (no previous records from the owner regarding alts, and I am only the second registered owner), the second was probably mud ingress as it happened after pulling someone out of the mire, the last two..? Not sure... Both were after several '000km of road-going activity. The splash guards from the wheel-wells are missing on the alt side and so the alt does get a bit of spray from the road, but nothing that much (I live in Aus - permanently dry!).
Any ideas..? I took it to an auto-sparky last week for them to check it over and this resulted in the fitment of the 4th alternator and b*gger me, this week the thing is over-charging again! This morning (on the way back to auto-sparkies) the alt lights began to flicker again at a constant 60kph in 4th gear. The last two failures were pre-ceeded by over-charging (instead of the usual rock steady 14v, it goes off the dial and the headlamps go like search lights.
The electrics are relatively simple, so any ideas what it can be? I'm stumped...
The trouble is I have blown 4 alternators in 5 years - I have no idea how the old the first was (no previous records from the owner regarding alts, and I am only the second registered owner), the second was probably mud ingress as it happened after pulling someone out of the mire, the last two..? Not sure... Both were after several '000km of road-going activity. The splash guards from the wheel-wells are missing on the alt side and so the alt does get a bit of spray from the road, but nothing that much (I live in Aus - permanently dry!).
Any ideas..? I took it to an auto-sparky last week for them to check it over and this resulted in the fitment of the 4th alternator and b*gger me, this week the thing is over-charging again! This morning (on the way back to auto-sparkies) the alt lights began to flicker again at a constant 60kph in 4th gear. The last two failures were pre-ceeded by over-charging (instead of the usual rock steady 14v, it goes off the dial and the headlamps go like search lights.
The electrics are relatively simple, so any ideas what it can be? I'm stumped...