Hey guys, can y'all please point me in the right direction on this? On my 66 Imperial, I am having an undercharging issue, with just under 12 volts at idle, just over 12 volts at high RPM. This measurement reads the same at the ALT battery post and directly at the battery. Below I've outlined the steps I've taken so far. I have a roundback alt with two fields. I think the original equipment was one field and grounded case, but understand the second "field" is really just a ground anyhow. Measured battery at rest with car off - got reading of 12.71 Set up direct charging wire (10 AWG, with crimped 14 AWG fusible link) going from ALT BATT post to starter relay batt post to bypass potential charging issues at bulkhead and/or ammeter. Tested old style mechanical (black box with IGN and FLD) VR ground with test light - good. Removed VR and wire-wheeled VR bolthole to get shiny body metal and re-attached. Re-tested and still good. Verified continuity of green field wire from ALT to VR. Wired a jumper from ALT GND field directly to known good ground. Had alternator tested at AutoZone - they didn't give a reading, but it read PASS on two different tests. I know AutoZone is pretty cheesy and they have limited credibility, but they are literally a quarter mile away, so I used them for this stage. A FEW QUESTIONS: 1. I thought the ALT FLD (green wire) should show hot or positive. Reading with my test light, though, it reads as a negative, as does the ALT GND field. What's up with that? 2. What is an accurate way to test the VR? 3. What are the next steps? Thank you guys for your help! Anxious to get this gal rolling again!