Jumpstart Audi A4. If dead battery is the reason for the breakdown of your A4, you can easily jump start it using jumper cables and a healthy battery from another vehicle, or using a battery booster if available. First connect red cable to the positive terminal of your A4’s dead battery, then to the positive terminal of donor battery.
Soit wasn't receiving any charge from the alternator, or was incapable of storing any charge. Clearly the former. A parasitic drain would mean your car never would have started up in the first place. If a battery is fully charged, then 13.3v when running under load at a 600 or so idle speed seems reasonable. Mistakes such as jump-starting the battery with the cables reversed and grounding the alternator’s battery terminal with a wrench, can cause the fuse to blow. A blown alternator fuse will prevent the charging system from working properly, leading to a variety of problems that can mimic a bad alternator.

3 Battery drain or dead battery. A failed ECM power relay can also cause a battery drain or dead battery. If the relay shorts it can leave power on to the computer, even when the vehicle is turned off. This will place a parasitic drain on the battery, which will eventually cause it to go dead.

Thebattery in an Audi A4 is located in the trunk, under the spare tire. It’s set underneath a metal frame, so removing it is tricky—but just accessing the terminals for a jump-start is easy. Once you have successfully jump-started your Audi, don’t forget to use. Jerry. —the.
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Yep going thru the same thing, new alternator / starter / battery / even changed out the ignition switch (plastic part) myself. Still won't crank (or I should say) will do the whur-ur-ur-ur thing before it stops, can't be the ecu, it has to be a short or even burnt / damaged + cable from battery to starter. Anyone? 2004 B6 A4 Avant Quattro 1 qB6GKbH. 221 172 85 98 99 388 78 295 439

audi a4 battery location jump start