Alternator check-up
 

Needed to change CDI box and coil last weekend.
Duno what made the CDI box fry. maybe the coil,
measurements are OK and putting the old coil back
for testing could kill my new CDI:rolleyes:

A frend told me that an alternator giving to much voltage
can also fry your CDI, so I might need to change the alternator
or voltage regulator.

Now the big (beginners) question:
Where do I measure the alternator voltage and what am i
supposed to measure?:confused:

Bart.

Get a multi meter and check voltage at the battery. Car off: 12.5 volts. Car running at 1000 rpm: 13.5-14 volts. Anything over 14 volts is overcharging.

The CDI-box can take at least 17V DC and it will do just fine.

3 pin cdi box has these pins:

5/450V triggered output
12V power in
Trigger pin (from the points)

ground connection on the CDI chassis

Soo..basically alternator has nothing to do with the frying...because, grounding 12V power would cause fuse blowing or melting wire, grounding trigger pin...well it is supposed to be grounded from time to time... and 5/450V triggered output creates a high voltage arc to coil...well this being grounded could cause some damage...

well...This is just me talking

Thanks guys,

Battery charging measures up.
It musta been the coil, especially with the black puss
that came out and messed up my nice chiny distributor cap:cool:

Bart.SmileWavy