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Discussion Starter · #1 ·
my voltage meter is usually at 14 but when i turn the heat on it drops to almost 12. is this bad? what could it mean? i also have an underdrive pulley but it has never caused any problems

Matt
 

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Discussion Starter · #2 ·
also this only happens at idle, when iam driving it is always at 14. when using the lights at idle it also decreases the voltage. is this normal or maybe a sign of a bad alternator?
 

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Voltage also drops a bit when the turn signals are on, but not the headlights or a/c. Not sure if there is some kind of voltage short or loose wiring. I had my alternator checked and battery tested and they said they both were operating perfectly. So must be something else.
 
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