Question about 2003 Volkswagen Beetle TDI

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Won't start My 2003 VW Beetle won't start. Used jumper cables yesterday and it started. This morning would not start. Tried jumper cables again to no avail. It would act like it was starting but then it would die. Please help. FYI-I had previously installed a baby monitoring system utilizing an invertor in one of the accessory plugs. Yesterday I had left it on by mistake. We thought that had drained the battery. After the battery had been "charged" we thought that had fixed the problem.

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Probability high:

Inverter drained your battery.

A "jump" was sufficient to start the vehicle.

After leaving the vehicle for X amount of time, you found it did not start ....because...............

A: potentially low electrolyte (fluid) in the battery which can cause various charging issues [including plate damage].
B: Did not drive long enough to charge the battery to a fundamental and useful state (low batteries take a longer time to charge).
C: bad battery plate

While you are at it, make sure you have no corrosion on the battery terminals; this dampens the effort of charging.

Should you have a meter, you can check the following;
battery voltage = 12VDC [car not running, ignition acc off]
battery charge voltage = 14.8 VDC [usually 120% of battery value] AND car running. This determines that your alternator is supplying the proper V.

Easiest thing to do; charge it over night with an external charging system. Also, you can drive your vehicle to many auto part stores and they will come out and troubleshoot the battery/charging system via an analyzer. This will tell you if your battery is sufficient or needs to be replaced.


Posted on Sep 29, 2008

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