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Current Flow Clamp meter


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Depends which direction the current is going and where you're measuring it :unsure: I dunno how much electrickery there is in a 300TDi but 10A into the vehicle's electrics whilst running doesn't sound too bad.

If you have more than an amp or so from the battery with the vehicle off then you have a problem.

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What Mr Freezer said ^^

Voltage is a more useful measure of whether the alternator is doing the job, should be over 14V wth the engine running.

Voltmeter is far more useful than ammeter. Run engine, and check battery voltage is over 14V. Then with engine doing 2000rpm or more, switch on headlamps, HRW etc and check it is still 14V or more. If it is, then alternator is fine.


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