NEW BATTERY AND ALTERNATOR VOLT METER MEASURES ZERO

2005 Volkswagen Touareg

Tiny

TregRex

October, 19, 2011 AT 8:57 PM

Recently replaced the alternator and battery at the dealrship. Volt meter now registers zero where prior to and during failure it hovered around 13 (best guess). Simultaneous use of A/C, heated seats, radio, wipers, etc. Don't seem to affect power delivery as they did during failure. The mechnic is telling me the zero reading is perfectly normal but I think he's giving me a line.

Could it be the battery and alternator are not communicating they way they should? What questions should I ask of my mechanic?

BTW, you solved a fuel-pump dilemma on my 1985 VW Cabriolet a long time ago. I asked every neighborhood mechanic to replace the pre pump and they pretty much shook their heads and said (effectively), "Cars don't have two fuel pumps. You don't know what you're talking about." I nursed it to a VW mechanic and asked, "Will you change my other fuel pump?" And he said, "No problem." That's the power of knowledge.

2 Answers

Tiny

rasmataz

October, 27, 2011 AT 10:08 AM

Check the power circuit on the battery gauge with a voltmeter if it reads battery voltage while engine is not running the gauge is defective, No voltage the wire is open to the battery or the alternator

Tiny

vwscott

July, 7, 2012 AT 5:19 AM

Touaregs had the alt. Cable fail. It raps around the back of the engine and goes to the starter.

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