1988 245 turbo with electric fan. Dave Barton wiring harness, about a year old. Basically, I've got a brand new battery and a Denso 100a from Philski. With the old 80a Bosch it'd go up to ~13.5v after starting and then immediately drop to ~12v and go down from there if I used headlights or anything. Same voltage at the back of the alt and the battery terminals. Replacing the brushes/regulator made zero difference. No resistance to ground on the alternator body. Belt tension is fine.
Now with the Denso it's almost exactly the same, except I was getting a steady 13.5+ when it was idling with nothing on, but driving with AC it got down to about 11v. I'm pretty stumped at this point, and a bit mad that I replaced what was probably a good alternator..
Now with the Denso it's almost exactly the same, except I was getting a steady 13.5+ when it was idling with nothing on, but driving with AC it got down to about 11v. I'm pretty stumped at this point, and a bit mad that I replaced what was probably a good alternator..