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<blockquote data-quote="mwjames" data-source="post: 7718380" data-attributes="member: 641219">So i&#039;m suspecting the grounds running to my amp and cap aren&#039;t the greatest as i get a decent amount of headlight dimming when i turn the stereo up to a decent volume and I am running less then 1,000 rms. my battery could probably use replacing soon but i would like to check through my grounds. The car&#039;s a 98 monte carlo i think the alternator is 105 amp.I currently have the big 3 done with 4 gauge, I&#039;m running 4gauge back to the cap then to amp. The amp and cap are both grounded to the seatbelt bolts under the back seat. I scraped off the paint and such from around the bolts I didn&#039;t put a terminal on the wire though, It&#039;s just a bunch of wire wrapped around the bolt then held down by a nut.So they main part of why I am posting is because I know there is a wait to check the grounds with a multimeter but I am unsure of how to go about doing this. If somebody could post how, that would be awesome it would be a bit better if you could post it in simple english to somebody who hasn&#039;t used the multimeter muchAlso when i check the grounds with the meter should i have the car running with the system going?I&#039;m a novice at best with car audio, the amp is a class D monoblock alpine incase that helps at all.</blockquote>

[QUOTE="mwjames, post: 7718380, member: 641219"] So i'm suspecting the grounds running to my amp and cap aren't the greatest as i get a decent amount of headlight dimming when i turn the stereo up to a decent volume and I am running less then 1,000 rms. my battery could probably use replacing soon but i would like to check through my grounds. The car's a 98 monte carlo i think the alternator is 105 amp. I currently have the big 3 done with 4 gauge, I'm running 4gauge back to the cap then to amp. The amp and cap are both grounded to the seatbelt bolts under the back seat. I scraped off the paint and such from around the bolts I didn't put a terminal on the wire though, It's just a bunch of wire wrapped around the bolt then held down by a nut. So they main part of why I am posting is because I know there is a wait to check the grounds with a multimeter but I am unsure of how to go about doing this. If somebody could post how, that would be awesome it would be a bit better if you could post it in simple english to somebody who hasn't used the multimeter much Also when i check the grounds with the meter should i have the car running with the system going? I'm a novice at best with car audio, the amp is a class D monoblock alpine incase that helps at all. [/QUOTE]

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