924Board.org

[bush0117]

I got a short some where. After you disconnect the negative side of the battery and you take and ohm meter and hook it to the negative side . I got voltage loss. Any suggest on where to look. I removed all the fuses and relays and the problem is still there. Also un hooked the ingition switch and the wiper motor and the problem is still there. With the ohm meter hooked up negative to negative side of battery. And you take the postive side of the ohm meter I got voltage every where I touch. Any sugggestions on this. Where to look next. Thanks for the Help.

Jason

[Smoothie]

I don't know - just some wild guesses here since no-one's replied...
I understand rectifiers in the alternator can short out... try disconnecting the large red wire from the alternator, then check again for volt drain?

Does the car have a clock? Maybe that's running? If so, it would be a very low amp draw and I'm assuming you're just doing a voltage check, so do an amp-draw check instead.

I also notice you're saying "ohm meter" - were you doing an ohms reading or voltage or what?
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"..it's made in Germany. You know the Germans always make good stuff."


'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

[welder]

With the positive lead connected to battery, scratch the negitive lead across negative post on the battery and if you get sparks there is a voltage leak. (pull the fuse for the clock first) Did someone install an after market stereo in your car, a good place to check. Have you noticed your battery going flat lately, or when did you notice this problem?
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I have a 78 n\a currently under restoration.

[kaffine]

Okay a little clarification please. What are you using an ohm meter, a volt meter, an ammeter? If you are using an ohm meter stop you will likely damage the meter by putting an external power source to it.



If your battery goes dead after the car sits for awhile you have a key off amp draw. A volt meter wont help find it because of it's very high internal resistance reading 12volts between the negative post and cable when they are disconnected is normal. You will need an ammeter.

Disclaimer I don't know what kind of electrical experince you have if you don't understand the instructions ask for more info before trying.

First make sure the battery and connections are clean. Next get a fuse rated the same as your ammeter put it between the negative battery post and cable leave it connected for a few minutes just to make sure it doesn't blow. If it does then don't hook you ammeter you can use a circuit breaker or a lot of fuses and start disconnecting the electrical equipment until it stops tripping the breaker or blowing fuses.

If the fuse doesn't blow put your ammeter on the highest scale and put it between the negative post and cable. If it reads less than 1 amp you should be able to switch to the milliamp scale check your meter to be sure also if on milliamps do not open any doors or turn on anything in the car damage to the meter may result. You should be able to get the amp draw below 50mA or 0.05A
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80 924
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