jread Posted May 16, 2015 Share Posted May 16, 2015 I am having an issue now that my Charge and Check Brake light are always on at low revs. Below ~1500 RPM they are faintly lit if it drops below 1000 they are full on. Checked the alternator today and even at around 500rpm they battery is still getting 14V at high idle when it starts it bounces in high 14 low 15 so not an alternator issue from what I understand. Kind of weird. Anyone know whats up? Quote Link to comment Share on other sites More sharing options...
TomRhere Posted May 16, 2015 Share Posted May 16, 2015 Set your multimeter to AC voltage and check at the battery again, engine running. Don't recall the number right now, but basically any AC voltage reading above say .3 volts is bad. Alternator has internal problems. Usually, when the dash lights start lighting up oddly, it's due to AC voltage from the alternator. Quote Link to comment Share on other sites More sharing options...
Subasaurus Posted May 16, 2015 Share Posted May 16, 2015 (edited) Something with the alternator, my stop lamp, brake, charge, all faintly light up when the diodes in the alternator begin to go out. not sure if my check engine also lit up, i don't think so. anyways i just went to replace it since it has lifetime warranty, so i never experimented with it. one thing is for sure though, the people at Oreilly's said theres nothing wrong with my alternator when they tested it, but i complained enough to get another and i replaced the alternator with another remanufactured one and they all dissapeared. good luck! Edited May 16, 2015 by Subasaurus Quote Link to comment Share on other sites More sharing options...
DaveT Posted May 16, 2015 Share Posted May 16, 2015 The CEL is wired different than the other lights. I've had partial fail alternators cause multiple lights to glow dim. A bad diode or a worn out slip ring brush can do it. 1 Quote Link to comment Share on other sites More sharing options...
jread Posted May 17, 2015 Author Share Posted May 17, 2015 Anyway to fix the alternator or do I just have to buy a new one? Quote Link to comment Share on other sites More sharing options...
DaveT Posted May 17, 2015 Share Posted May 17, 2015 I've rebuilt them. New bearings with contact seals, swapped brushes from spares, etc. I have a link to a parts place somewhere, don't have it here. If I don't post it later, remind me. Quote Link to comment Share on other sites More sharing options...
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