2004 Ford Crown Vic 44,500 miles
I'm a 72yo retired 30 vet (USN Aviation Electronics Techinician)
who attended the Delco-Remy Electrical Auto Training way back in 1967.
Discrepancy: On the way home last week, Alternator
dash warning light
came on and the alt-gauge was at the top (Over-Charging). I continued
home since I was about a mile from the house. One of my auto manuals
indicated that it could be the alternator so, I borrowed a rebuilt
from my buddy at O'Reilly's. No joy, still overcharging. I checked
resistance of heavy battery charging lead from top of alternator back
to battery (fusible link) when changing alternator & it was 0.1 ohms
on different 2 Fluke meters. I also tested the battery with a heavy
load tester to see if cell was opening up. it was good,
i.e. green for 40 seconds.
1- Max alternator overcharging/high voltage out at all times.
2- Ignition switch dead in all positions.
3- No power indication in vehicle at all.
4- No power to fuse box on passenger side fender-well.
5- If I jump power from battery to RH fuse box, car cranks
& runs but, with high-alt-output for 15-20 sec test.
Sounds like a power relay, but which one??