Got here a 05 2.2 Zafira, the battery was replaced by the owner about 6 weeks ago due to low battery starting problems, its again got starting problems, I tested battery voltage with engine running and was only getting a little over 12 volts with a load on, headlamps, heater blower
I took the alternator off, most of the time I just give the alternators to alternator\starter repair guy and let him sort it out, this one I tested it on the benchwith a variable speed electric drill, 1st was ripple test, looks ok to me what do you guys think
On that test the red trace is the test\battery lamp, you can see just after 12 sec's the lamp go out and start charging but only at just under 13 volts, as I increased the speed the voltage increased to just under 14 volts but only for about 6 sec's then starts dropping off, slowed it right down till the battery\test lamp started flashing, 29 sec's.
The minimum voltage is just over 12.5 volts, the max is just over 13.5 volts, this alternator, according to the bosch part number its fitted with a multi function regulator with battery voltage monitoring
Here is another bench test with a battery that did not have enough in it to start an engine, again red trace is batter\test lamp. You can see the min voltage is just over 11.5 and max is just under 13.5
So the question is, is this reg working as it should or should we be seeing a higher regulated voltage at a lower speed ?
Last edited by Liteace
on Wed Mar 06, 2013 7:10 pm, edited 1 time in total.
DONT SHOOT YOURSELF IN THE FOOT