Hi im having problem with my truck . the alternator seem not charging the battery i did few test i pull out the alternator bring to a garage they test it and say it charging to mutch around 18 volt he said so i assume bad ground or wire put it back on at the battery i got 12v so the battry reading and at the alternator terminal i got 15 volt so look like it working but not sending the voltage at the battery... i test ground from battery it fine like 0.3 ohm with the frame and the positive with the alt output and same like 0.3 ohm . could it be the alternator anyway ? any help will be very apreciate
thanks
thanks