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Audi 100, S4: 1992-1994, A6, S6: 1995-1997 (C4) Loose Connection somewhere


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Last Post: Oct 22, 2012 11:50 PM Last Post By: Ratbag1
Ratbag1

Posts: 21
Registered: 05/04/10
Loose Connection somewhere
Posted: Oct 15, 2012 9:06 PM
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My 1992, '100, sometimes just 'clicks' when starting even though the battery is good. After one or two attempts the engines fires up as if nothing is wrong. I strongly suspect a loose earth connection and would like to know where to start looking. Can anyone give me a pointer please.
budpalumbo

Posts: 1,456
Registered: 12/09/03
Re: Loose Connection somewhere
Posted: Oct 17, 2012 12:01 PM   in response to: Ratbag1 in response to: Ratbag1
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Start by testing if the starter gets power on the start signal wire each time the key is turned. If not, the ignition switch is most likely culprit. If it does, check for battery voltage on the main power lead. A voltage drop test would be best for checking cable/connection integrity. A quick and dirty test for proper ground would be a jumper cable on the engine block to the battery negative. If it still fails, the starter probably has a bad spot in it.
Ratbag1

Posts: 21
Registered: 05/04/10
Re: Loose Connection somewhere
Posted: Oct 22, 2012 11:50 PM   in response to: Ratbag1 in response to: Ratbag1
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Thanks Budpalumbo, I will check all those next week when I get a chance.
Cheers, William

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