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<blockquote data-quote="NJL" data-source="post: 124211" data-attributes="member: 1435">Its pretty easy to check your systems if you have a voltmeter handy. To check your battery, first throw the charger on it over night. Then when your ready to test it, attach the voltmeter (set to DC volts) leads across the terminals and crank the engine. On a good battery the voltage level shouldn't drop below 10 VDC. If it does, that means your battery isn't holding a charge like it should. To check your alternator, apply the voltmeter across the battery terminals while the engine is running. The reading should be 13-15 VDC. If the voltage reads less than this, it means your alternator output isn't enough to charge the battery. If it's above this, then the voltage regulator in the alternator is bad and your overcharging and damaging the battery. To check your charging system unhook the leads from the battery and attach the volt meter to them. Turn on the charger, the reading should be 13-15 VDC. If its less than that, it's not charging the battery. If it's more than that, it's damaging &amp; reducing the life expectancy of the battery.</blockquote>

[QUOTE="NJL, post: 124211, member: 1435"] Its pretty easy to check your systems if you have a voltmeter handy. To check your battery, first throw the charger on it over night. Then when your ready to test it, attach the voltmeter (set to DC volts) leads across the terminals and crank the engine. On a good battery the voltage level shouldn't drop below 10 VDC. If it does, that means your battery isn't holding a charge like it should. To check your alternator, apply the voltmeter across the battery terminals while the engine is running. The reading should be 13-15 VDC. If the voltage reads less than this, it means your alternator output isn't enough to charge the battery. If it's above this, then the voltage regulator in the alternator is bad and your overcharging and damaging the battery. To check your charging system unhook the leads from the battery and attach the volt meter to them. Turn on the charger, the reading should be 13-15 VDC. If its less than that, it's not charging the battery. If it's more than that, it's damaging & reducing the life expectancy of the battery. [/QUOTE]

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