hey i really need quick help PLEEEZZZ

[jaygeorge1979 10+ year member]

hey this is my problem,

i helped my friend install his amp a couple of days ago...all went well...untill the next morning...his battery was dead. I told him it must be an alternator or battery prob but he said that he thinks I have it wired to be on all of the time, therefore running down his battery overnight. I have the power wire 8 gauge running directly to the battery and the system control wire (the light blue wire on an aftermarket stereo) to the AC switch...it only works witht the car on and I used the voltage tester to prove it. and when he turns the car off the LED power light turns off also...is it possible that even though the LED was off that the power wire still ran down the battery??? or was he slowly burning up the battery while he drove around for 2 hours after the install...his car is a late 80's mazda...little japanese car....needs inspection maybe bad alt or bad battery or maybe he needs a cap even though it is only a 200 watt max amp. please help soon i need to help him......thanks

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[dac 10+ year member]

i think maybe the batery bad, if the power still run down i don't think so

 

[jaygeorge1979 10+ year member]

no no we did an experiment...we had him leave the amp wired up over night...he hadnt been using it all day...sure enough his car started right up, proving that the wiring was right, but the batt or alt is bad...

 

[SoLoItHz 10+ year member]

Have your alternator checked out and your battery. Most auto parts stores will do this. Advance or NAPA will test it for you and it will only take a few minutes. Good luck hunting the problem down. By the way, never let friends do your work. It may be good work, but you can't always expect problems to be solved quickly and/or effectively.