Those numbers are okay. Check the condition and gap at the points, clean and regap (.016"-.020") if necessary replace them.
when cranking the engine the battery voltage should not fall below 9.6volts if so replace battery
The head lamps should not get dim. Dim light are an indication of low voltage. You should have a volt meter in the instrument panel. If the voltages is not reading about 14V when the engine is running, you have a bad battery or alternator. It should read over 12V with the engine not running and the ignition in the on position. It should not drop below about 9-10 when cranking the engine. If you have low voltage during cranking and normal voltage at other times, you probably need to replace the battery.
when ignition is on it should be battery volts,when cranking in should pulse..(test with a led test light or osilliscope
It should.. I have a 79 1600cc in my 65 beetle.
Diodes get damaged when their reverse voltage or forward current ratings are exceeded. It is also possible that a high speed transient could exceed the forward voltage rating before the diode turns on, but this is not normally the case. In a car, primarily in the alternator, diodes get damaged by excessive current draw, or by connecting batteries backwards when jump starting. One way to get excessive draw is to attempt to rev the source engine while cranking the target engine - that is not a good idea - you should only rev the source engine when you are trying to add some charge to the target battery - you should let the source engine idle when cranking the target engine.
The sensor is a hall effect sensor. Measuring resistance will not indicate a "pass/fail". You must test voltage of the sensor while cranking engine. You should see voltage change from 0.0v to 5.0v or see 2.5v on meters that have an averaging function.
If you are checking Alternator voltage, It should 12.8 volts to 14.3 with engine running. Battery voltage is 12.3---12.8 with engine off.
Your VW Beetle check engine light comes on when there is a problem with one of a number of sensors on the vehicle. Take the car to the dealership to have them determine the engine problem and reset the light.
should be 2 to 3 psig
My 1995 Ford Explorer XLT with a 4.0 L - V6 engine came with (a 650 cold cranking amp battery )
Just put a new pump in mine and it now has 89.52psi. 28psi is very low.
Yes as soon as you turn on the key in fact.