car charge

[theslab]

Just replaced my alternator today drove great until i started losing power slowly, then it dies. why would i lose all my power? help me out i love my dsm

 

[GsXdSmKingGsX]

Are your connecotors decent? And how old is your battery?

 

[theslab]

Yup just bought the battery and the connector for the ground is kind of shitty but worked before.
####in dsm's fix one thing another breaks

 

[FRslimmyjim]

are your terminals dirty? do you run your stereo system straight off your battery? also, did you pull any dashboard lights? they might be draining you if they are on and the car is off.

 

[steve]

Check the 80A alternator fuse. If it's blown the current from the alternator doesn't reach the battery.

 

[xezerax]

If you have a meter, check for a voltage drop between the alternator and the battery.

 

[theslab]

fuse is fine i do have subs but they're disconnected from everything at the moment. what am i checking for with the voltmeter? new alternator, new battery ,new ecu just fixed by ecmlink. This is weird

 

[steve]

Your checking the voltage at the battery and at the alternator B+ stud.
Measure with the car off, car idling, and car idling with the headlights, rear window defroster, and blower motor running. One more measurement with the engine at about 2k would complete the picture.

With a charged battery you should see 12.6v with the car off and at least 13.6v at idle. If the voltage drops lower than that when you turn on the accessories you have a bad alternator that can't handle the load.

The voltage shouldn't go over 15v anytime or the regulator in the alternator is bad.

 

[theslab]

Yeah i think they sold me a faulty alternator. thanks