it may show 12 or more volts on a meter ( good starter ) but cranking amps are low and turns motor too slow to start ? why is that and how do u test cranking power , is there a other setting on my voltage meter to test amps?
2007-03-09 13:41:46 · 5 answers · asked by Anonymous in Cars & Transportation ➔ Motorcycles
it is a brand new machine , i just charged battery to 15 volts and still it barely turns over , everything is ok with bike , but why when battery shows so much voltage it cant turn it over ?
2007-03-09 14:16:13 · update #1
There is a problem which occurs on batteries, not often, and many do not understand it, but it is caused by a high resistance connection between two cells in the battery. The battery will show full, or almost full voltage, a fully charged battery will show 12.5V or a bit higher. Put your volt meter leads on the terminals of the battery and turn the switch on. Voltage should drop a bit, maybe .5 or .6 volts if the lights come on with the switch, less if just ignition. Press the starter button, voltage should drop a couple of volts, if the starter works. If it goes down to 3 or 4 volts, this is a pretty sure sign of a high resistance connection, in the battery. Only fix is a new battery. Note, touch the battery terminals, not cable ends when measuring this. If battery voltage stays high, then move on down the cables and see if you find a drop, then the problem is between the place you are metering, and the battery. On the ground side, go from a good ground, to the ground post on the battery, press the starter, if you get a voltage here, this shows a bad ground, clean both connections on the ground cable. If this is good, measure from starter post to ground, if bad, back up to the starter solenoid, try side toward starter, then input side. If the battery voltage is holding up and you have a drop here, you have isolated the problem. If voltage hold up at the starter, and it still turns slow, then either the starter is bad, or the engine has a problem, causing it to be hard to turn.
Tomcotexas.
2007-03-11 08:09:15 · answer #1 · answered by tomcotexas 4 · 1⤊ 0⤋
Flashlight batteries will often do the same thing. Show 1.5 VDC
but when you try to light up a bulb, the voltage drops to zero.
Either your cables and connections are dirty or the battery is shot if it wont take a charge.
2007-03-09 14:04:19 · answer #2 · answered by Trump 2020 7 · 1⤊ 0⤋
You may have a bad cell or two in the battery. Or if its an old style battery it may be low on water.
Take the battery to a Auto parts and they will run a free test on it for you,
2007-03-09 13:46:56 · answer #3 · answered by ZRX1200 4 · 0⤊ 0⤋
You need a load meter. It uses strong resistance to check the battery. It will tell you if the battery will put out the correct amps under load.
2007-03-09 13:48:00 · answer #4 · answered by Anonymous · 1⤊ 0⤋
Yes, your battery is failing to provide the current needed to start it. You need a new battery.
2007-03-12 03:17:54 · answer #5 · answered by joshnya68 4 · 0⤊ 0⤋