This is the wrong way to approach this. First of all, we never look at fuse box diagrams for this type of problem. There is no fuse specifically for the charging system, and if there were, there are faster ways to start the diagnosis. Also, if you remove a fuse to visually inspect it, you may remove a good one that removes power to some other circuit, and doing that on VW's and some other models, especially newer models, can end with catastrophic results and the need to tow the car to the dealership to have multiple computers unlocked.
Instead, if you really want to check fuses, use a test light on the two test points on the smaller fuses. If you find twelve volts on both sides, that fuse is good. If you find 0 volts on both sides, that circuit is turned off. You're looking for a fuse that has twelve volts on one side and 0 volts on the other side. That one is currently turned on and the fuse is blown. I have a trick for troubleshooting that problem if it becomes necessary.
The first thing you need to do is list the symptoms. That will help us decide where to start looking. If you suspect the generator is not working, simply measure the battery's voltage while the engine is running. You must find between 13.75 and 14.75 volts. If you do, that only means it is okay to perform the second half of the tests, and that requires a professional load tester. The test is for "full-load output current" and "ripple" voltage. Those will tell us if the charging system is working properly.
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Friday, December 2nd, 2016 AT 3:00 PM
