Lancer
Junior Member
08 Ultra Classic, 47,000 miles, battery replaced last year.
When driving the headlight and driving lights dim. Voltage drops to 12 volts.
This lasts about 15-20 seconds, then everything returns to normal. The first time this happened it did throw a code, (low voltage). This happened twice over a two week period.
I checked and cleaned all battery wires, unplugged connectors at voltage regulator and cleaned them, cleaned voltage regulator ground. The battery ground at the frame was a little tarnished. Figured I had found the issue, I was wrong. Did it again this morning on the way to work, but did not throw a code.
Ideas? Impending voltage regulator and/or stator failure?
I found this in self help,
"To do this with a meter which is more accurate: black lead to battery ground, red lead to each pin on the plug, start with the voltage scale higher than 12vdc and move voltage scale down in steps for each pin. Any voltage is a bad regulator. You may get battery voltage on all three pins on the newer 3 phase regulators. The no voltage is for older type regulators with diode indicating the diode is bad and the regulator needs replacing."
So how is a 3 phase VR checked? Thanks for any input and ideas you may have.
Lancer
When driving the headlight and driving lights dim. Voltage drops to 12 volts.
This lasts about 15-20 seconds, then everything returns to normal. The first time this happened it did throw a code, (low voltage). This happened twice over a two week period.
I checked and cleaned all battery wires, unplugged connectors at voltage regulator and cleaned them, cleaned voltage regulator ground. The battery ground at the frame was a little tarnished. Figured I had found the issue, I was wrong. Did it again this morning on the way to work, but did not throw a code.
Ideas? Impending voltage regulator and/or stator failure?
I found this in self help,
"To do this with a meter which is more accurate: black lead to battery ground, red lead to each pin on the plug, start with the voltage scale higher than 12vdc and move voltage scale down in steps for each pin. Any voltage is a bad regulator. You may get battery voltage on all three pins on the newer 3 phase regulators. The no voltage is for older type regulators with diode indicating the diode is bad and the regulator needs replacing."
So how is a 3 phase VR checked? Thanks for any input and ideas you may have.
Lancer