I have 97 catera and I dont know if its the alternator or what> Becouse every time I turn on my a/c it drains alot of power and my battery idle goes really low. Can anybody help? I really would apreaciate it.

can anybody help?

Well, you will have to check first if the alternator is giving out enough voltage, don't just measure from the battery cables, if you can, measure direct from the alternator itself. If you get a big discrepancy in the reading, then your battery cable probably needs replacement. Unless you establish the condition of your alternator, then you can't move forward to the next step. It happened to me in the past, I even had to replace the battery with a new one, but it turned out that i had to replace the battery cable, specifically the positive cable. The car just emits too much heat that if you use a small gauge cable, it gets cooked so fast. So in case you go for a battery cable replacement, go for the thickest you can find.

thanks alot ill try that.