ok the other day i was driving and i noticed my volts were low so i went back home the nexted day i went and had my alternator tested it took the dumbass like 45 mins to test it and then he said it was good..so i went back home and me and my dad were trying to figure it out so we took his battery out of his truck and hooked it up and his battery started to die so i went and got a new battery..i hooked it up and started my car and the volts started dropping so today we went and got a new alternator hooked it up volts still low and there at 8 so now we dont know what it could be...has anyone else had a problem like this?

 

You need to check the power feed for the alt. What kinda car?

 

HEy im having that SAME problem any help woruld be great.

 

voltage regulator? or grounding issue perhaps....[&:]

 

What is with everyone and having electrical problems recently. First I would test things to see how much power you are losing and when you are losing it. There have been a couple of recent threads where I have gone over how I was able to find my problem (Just recently had similar problem). I would try to answere the following questions:

Is the alt charging the battery (Test voltage before and after start-up)
When the battery is charged and not hooked to anything will it keep voltage
Does the battery lose charge when it is hooked up and not runnning

 

check the plug definitely goin in to the alt thats a common place for fires to start[&:] makes sure its not corroded burnt/melted etc

 

Might be related...My jeep Cherokee had a similar problem just last week. I would be driving and my volt meeter would be reading ike 8-9 volts. Turned out that my belt was slipping but not squealing. I tightened the belt and the problem dissapered.

Also make sure your engine block is grounded to the body with one of those braided stainless straps.