92CAMARO350EDEL

When ever i turn my lights on i watch my power go down and when i turn my heater on it goes down even more?? but when i turn everything off it goes back up to normal...any suggestions or known causes for this???

hotbird89

Sounds like one of a few problems.

Problem 1: The alternator is weak and is not puting out the correct amperage. Your local parts store can test this.
Problem 2: The battery is bad, not holding a charge and resulting in voltage drop when you use high power accessories.
Problem 3: The battery cables are corroded (could be inside the jacket where it cannot be seen), resulting in high resistance which causes voltage drop.

92CAMARO350EDEL

ive checked both the altenator and the battery is brand new.. i will check the wires tho...thanks

hotbird89

Test the wires for resistance, but be sure that you disconnect one side first, or you will get a false reading.

Drew

iTrader: (58)

How far down does the voltage drop? Are you going by the factory gauge or are you using a digital voltmeter? To an extent it's normal for the voltage to drop a bit.

92CAMARO350EDEL

i just put brand new wires on and they are good. I am going off of my factory gauges and they go from 13 to below 8

Drew

iTrader: (58)

Try monitoring the voltage with a DVOM, and see if the gauge is actually reading correct. Also I'd have the alternator tested a couple more times before assuming it's ok. A lot of parts stores don't know how to run their equipment. If you've got a local shop that does starter and alternator rebuilds, they'll probably be a little more proficient at testing the components.