12.08Volts At Battery.20.8V From Old Reg/rec. 14.5V From New?

[StevieCx]

Are there any electrical gurus out there today?

2006 vfr800 vtec. UK Spec. New stator, new battery & new reg/rec. Old reg/rec output was 20.8v. New reg outputs 14.5v.

Voltage across battery terminals on Both reg/recs is 12.08v! How can this be?

All connectors on loom that can be found without stripping it checked and 'seem' good. Haven't checked or located all earths yet but a list of where they all are would be very helpful. Got a tail light to change and the two 5w5 marker lights to change as all blown.

Any suggestions from you guys out there - this one has me majorly stumped.

Bike cut out yesterday after ABS light rapidly flashing and then loss of all power over next 5-6 miles. Digital dash cut out, all lights failed but bike still ran smooth until the fuel pump died. New/charged battery sees it fire up effortlessly and runs good, just no charge???

Thanks in advance for any suggestions.

[Cogswell]

Sounds like the battery could use a load test. A voltage check alone is insufficient for positive determination of condition. Start with a known good one. Common problem areas are the R/R to stator connector (3 yellow wires on the right side) and the fuse / starter relay next to the battery. Pull all connectors / fuse on it apart and inspect. Follow the negative battery lead up to the main ground under the fuel tank pivot where it attaches to the frame. The one you can see next to the battery cover is not the main harness ground.

See the pinned threads in the electrical section for detailed diagnosis / repair instructions.

[Switchblade]

Any add-ons ?

[Knight]

Welcome StevieCx!

Did you just acquire this bike, a fixer upper with unidentified problems?

Any add-ons ?

Yes,if the battery is at 12.8 then you turn the ignition on and its voltage plummets, the first suspicion is excessive drain from accessories or otherwise a short circuit.

Test for shorts: With the bike off, put an ammeter between the negative cable and negative terminal. Start at 20A then increase the sensitivity setting until you get a valid reading. The max current should be 3mA or .003A. If higher there is a short. Pull fuses until the current drops and you have identified the circuit with the short in it. Check the electrical diagram to trace the components on that circuit.