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What could cause a ground to go bad?
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<blockquote data-quote="jmstrawn12" data-source="post: 8830202" data-attributes="member: 687996"><p>I recently upgraded my factory stereo with a new head unit, amp, speakers, and all the wiring and everything worked great for a month. Now the amplifier will work occasionally but most of the time will go into protect mode or not turn on at all. I checked all connections, ran resistance checks on the wires, and also did a voltage check on all power cables. I found that when the amp wasn't working there was between 6 and 7 volts running thru the system. When it does work is 12+ volts. I finally traced the problem to the ground cable which is connected to a long bolt that holds my passenger chair to the car. When I originally installed the ground cable I made sure to scrape away all the paint and use a brass battery lug to secure the ground wire. As mentioned it worked great for a month but now it isn't grounding properly. I removed the bolt and cleaned the area and the bolt with a wire brush then reassembled. It's still not grounding correctly. What could cause a previously good ground to go bad?</p><p></p><p>Mike Strawn</p></blockquote><p></p>
[QUOTE="jmstrawn12, post: 8830202, member: 687996"] I recently upgraded my factory stereo with a new head unit, amp, speakers, and all the wiring and everything worked great for a month. Now the amplifier will work occasionally but most of the time will go into protect mode or not turn on at all. I checked all connections, ran resistance checks on the wires, and also did a voltage check on all power cables. I found that when the amp wasn't working there was between 6 and 7 volts running thru the system. When it does work is 12+ volts. I finally traced the problem to the ground cable which is connected to a long bolt that holds my passenger chair to the car. When I originally installed the ground cable I made sure to scrape away all the paint and use a brass battery lug to secure the ground wire. As mentioned it worked great for a month but now it isn't grounding properly. I removed the bolt and cleaned the area and the bolt with a wire brush then reassembled. It's still not grounding correctly. What could cause a previously good ground to go bad? Mike Strawn [/QUOTE]
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What could cause a ground to go bad?
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