Mike2JZ Posted June 19, 2019 Share Posted June 19, 2019 I've seen some alternators only show signs of charging issues once loaded, prompting the warning lights to appear before disappearing again. They are fine cruising, idling etc, but once you give it the beans and get higher in the rpm then the failure shows itself. Check that the main alternator wire is not loose and the alternator plug is intact and does not have bad frayed wires. If thats all good then maybe try borrowing an alternator to see if issue goes away. Quote Link to comment Share on other sites More sharing options...
fastphil666 Posted June 20, 2019 Share Posted June 20, 2019 Thanks for the replies folks, i wasnt sure if id get one due to the vintage of the original post. Im going to check all the cables to and from the alternator and battery for abything obvious this weekend. Previous owner never saw the issue and im wondering if i disturbed wiring when i did the cambelt change. We shall see? Quote Link to comment Share on other sites More sharing options...
Scooter Posted June 20, 2019 Share Posted June 20, 2019 Could it be the regulator gone............can you test if it's overcharging at high revs (just need a multimeter) Brushes and regulators are available cheaply and easy to replace once the alternator is removed. Quote Link to comment Share on other sites More sharing options...
fastphil666 Posted June 20, 2019 Share Posted June 20, 2019 Managed to get half an hour with the old girl. Found the main cable was loose. Ive tightened it up but in doing so i touchwd the alternator with the spanner and blew the 120amp fuse! Doh! Quote Link to comment Share on other sites More sharing options...
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