Voltage Issues By redwood0318 (Read 188 times)

[redwood0318]

Recently my scoot has had problems staying charge at random times. ive tested the battery and it holds almost 13 volts easy for two days. I saw something on you tube about your voltage while the engine is running should be 12-15 but never more than fifteen. If thats true then what problems could that cause? and What is the best way to fix it. i havent blown any bulbs. no fuses are blown. Is it the regulator rectifier? The engine is a 1p39qmb. Thanks for the help!

[Alleyoop]

Batteries loose their charge just sitting there. What is the voltage after two days of sitting?

A battery will also loose charge if the scoot has an alarm, or digital clock built in the the instrument panel.
Alleyoop

[redwood0318]

is over fifteen volts normal?

[Alleyoop]

Apr 4, 2014 23:33:22 GMT -6 redwood0318 said:

is over fifteen volts normal?

No if it is charging over 15+ volts it is overcharging and damaging your battery. That points to a bad Regulator/Rectifier it is not regulating the DC voltage.

A optimum charging system is 14.5-14.7 but really anything over 13+ volts is okay.
Alleyoop

[tvnacman]

I had a scooter in the shop with a charging problem , it was not charging . I figured out it was the regulator I replaced the regulator . Then had the same problem then it started to charge . I found the headlight switch was shorting internally loading down the charging voltage . Very strange problem .

John

[Alleyoop]

The trick is to check what the output of the R/R is NOT to check at the battery terminals. That would have told you the R/R was good that it was something else drawing to much juice from the battery.
Alleyoop

[masterburt]

I had this problem but with a 139qmb engine.i just changed the wirng loom including components and sorted it,cheap nasty chinese bikes Never again