belacane Posted March 10, 2014 Share Posted March 10, 2014 Cranked up my '86 Brat the other day, and the battery gauge read between 17 and 18+ volts from start and throughout my whole drive. Otherwise, she runs like she usually does. I'm imagining that whatever regulates the voltage has gone kaput. If this is the case, I'm wondering whether the voltage regulator is located inside the alternator or if it's external. Also, if anyone thinks I'm completely off the mark, let me know as well. I'm still quite a beginner at this. Thanks in advance! Link to comment Share on other sites More sharing options...
bratman2 Posted March 11, 2014 Share Posted March 11, 2014 It is inside the alternator and you are pretty much on the mark. Link to comment Share on other sites More sharing options...
ruparts Posted March 11, 2014 Share Posted March 11, 2014 hi, since you might be in the market for a new, or another alternator,, you might consider the 90 amp nissan unit many of us have done to our vehicles. the alt is a direct bolt on ,, just need to do a pulley switch and an adapter for the 2 wire connector, and 90 amps on tap. i used the oem nissan connector on the alt and made an adapter with a female connector on the other end that accepts the oem subaru alt connector,, nothing gets cut and can always go back. but i like the extra power, especially nice with the lights going and the heater and wipers , even at idle it all stays up and running, i say "ditch the dim"! Link to comment Share on other sites More sharing options...
jono Posted March 11, 2014 Share Posted March 11, 2014 (edited) Cranked up my '86 Brat the other day, and the battery gauge read between 17 and 18+ volts from start and throughout my whole drive. Otherwise, she runs like she usually does. I'm imagining that whatever regulates the voltage has gone kaput. If this is the case, I'm wondering whether the voltage regulator is located inside the alternator or if it's external. Also, if anyone thinks I'm completely off the mark, let me know as well. I'm still quite a beginner at this. Thanks in advance! I did exactly the same 24 hours ago in my 84 Brumby !! On the other side of the globe too !! 14 Vots at idle and before even 3000rpm get 17 and 18 Volts. Must have been like this at least 3000km, lucky nothing fried. The reg is inside according to the Hitachi label. I wanna keep mine but find a universal fit up external regulator so I don't have to trash the alternator. A word of warning. The same thing happened to me years ago, so replaced the replaceable regulator in the back of the Boschh unit to get same result. It turns out that a near dead battery in the multimeter was the cause! This time, I double checked two DMMs and two cars before swapping in a spare alternator Edited March 11, 2014 by jono 1 Link to comment Share on other sites More sharing options...
belacane Posted March 11, 2014 Author Share Posted March 11, 2014 Thanks guys! Looks like I'll be installing a new alternator. Thanks for the Nissan tip. Link to comment Share on other sites More sharing options...
belacane Posted March 13, 2014 Author Share Posted March 13, 2014 Well, I found another alternator that I had laying around, and installing it fixed my issue. Thanks again guys. I think I'm also going to look for the nissan swap alt. for the future. Link to comment Share on other sites More sharing options...
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