Question about Cars & Trucks
Over charging or its the alternator
Voltage regulators are tested with a volt meter and an amp meter and is done by a qualified auto electrician. so instead of running the risk of damaging the alternator rectifier and regulator have it done professionally
Posted on Dec 30, 2013
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Posted on Jan 02, 2017
SOURCE: 2003 VW Jetta Charging problem
problem is that the voltage regulators on the 1.8t which I am sure is the same on the TDI alternator....is that they may work fine when they are cold....but once they warm up is when they start acting up and causing problems. I assume is has to do with some resistor over heating. This is just a common problem noticed by most people over at VWvortex.com.
So you can take your alternator to get tested but if it is tested cold then well it may appear to be working ok. When in reality it is broken. Trust me...it is a cheap enough part and easy enough to fix to not just try it. Some can even change the regulator without taking the alternator out. If you have small enough hands I can see it being done.
Posted on Feb 20, 2009
Jump terminals A to F and the alternator should full field and charge. If it charges then replace the regulator. if it doesn't charge replace the alternator. I remember the terminals by thinking of the word AIR FORCE .
Posted on Apr 03, 2010
Hi, there are 3 fuses the the alternator needs to charge the battery. These may be inside the car or in a box in the engine compartment. They are named IG1, ECU, and ALT. If you have trouble finding them, please get back to me.
Posted on May 08, 2011
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