Hi, my 4JB1 rodeo has recently started staying at about 12.8v after the first start of the day for about 2 minutes before it goes up to 14v. The other night I noticed that it had dropped to 12.9V for maybe 3 minutes or so before increasing to 13.5V and stayed at 13.5 for 45 minutes. The next morning it was back to 14 - 14.1V. It normally runs at about 13.9 or 14 at night with lights on. No idea how old the altenator is but I know it hasnt been touched for atleast 200,000kms. Whats the best bet, new brushes/new alternator/full rebuild of old one? Just looking for ideas.
Cheers