So my galant died on me this weekend. Towed it home and started running some tests. After I charged the battery back up and started the car I was seeing 14v for about a minute and then it dropped back to 12v. I pulled the alternator and swapped one from my 1g Laser and started the car up. 12v. Pulled it out and took both down to kragen and they both passed. Im trying to find out if someone has a copy of the alternator circuit diagram because all I have is the 1g DSM one and I am not sure if its exactly the same(Like L terminal running through relay and indicator light). With the key on engine off Im seeing 12.5v(+Bv) at the S terminal, but only 11.2v at the L terminal. Is this right? Or should I be seeing 12.5v at L as well?
I ran a resistance check between the L terminal and the terminal at the alternator relay and there is no readable resistance value. I want to check the other half of the L circuit to see where I am losing Voltage. I also checked the B terminal circuit and there is no resistance between it and the + battery post. I am not sure where to look next and its a little hard for me to think that I have 2 bad alternators that both passed the part store tests.
I ran a resistance check between the L terminal and the terminal at the alternator relay and there is no readable resistance value. I want to check the other half of the L circuit to see where I am losing Voltage. I also checked the B terminal circuit and there is no resistance between it and the + battery post. I am not sure where to look next and its a little hard for me to think that I have 2 bad alternators that both passed the part store tests.