11.91 volts out of alt ??
My alt is putting out 11.91 volts even at hi revs...with all lights and H fan.
Changed out alt with buddies spare...also puts out 11.92 volts.
These alts both have internal regulator tag on them.
Does my ECU control the output ?
This reading is at battery posts and also live wire in cab.
Can there be 2 alts with the same low output ?
Could this be why my yellow top Optima died ?
Still worried about eliminating my ECU...can't find name on donor carb.
Giving that idea a rest for now.