pauldan181
Well Known Member
The other day I turned on my landing lights descending to my local fuel stop and noticed my bus voltage had dropped to 13.2 volts. I switched the lights off and it came back up to 13.8v. My alternator has always put out 14.2v regardless of load or RPM. With no load I still get 14.2v and it begins to drop as each light or device is switched on. I confirmed this voltage drop with a multimeter attached to the alt. output post. With everything I have on (about 22 amps load) it gets as low as 13.0 volts
I replaced the alternator (40 amp Denso IR) and is behaves in the exact same way. The engines starts fine and the battery appears to charge normally. I replaced the battery anyway but no change. I've checked all applical circuit connections and all are secure. My electrical system is pretty simple and this should be an easy fix. I'm hoping somebody else has seen this and can point out what I'm missing.
I replaced the alternator (40 amp Denso IR) and is behaves in the exact same way. The engines starts fine and the battery appears to charge normally. I replaced the battery anyway but no change. I've checked all applical circuit connections and all are secure. My electrical system is pretty simple and this should be an easy fix. I'm hoping somebody else has seen this and can point out what I'm missing.