Retrotronic
New Member
I have a 2003 Expedition with a charging issue. New battery, new alternator. Having trouble finding more information online. Checked fuseable link (good) so constant on 3 pin is reading battery voltage. Ignition on voltage on one pin is only 8.47. Should this be 12? I checked to see if possible resistance (corrosion) in wire, but am getting 8.47v at both ends. Is ECM possibly to blame? Can I use a jumper from battery to low voltage pin without damaging things?