wiring help

[mscottc]

ok so i couldnt find a wiring harness for the 2001 alero locally so i found out you can use one from a 2000 so i did that and for some reason i could only get it to work by turning the lights on when i wanted my radio to come on dose anyone know why?

[Cliff8928]

Because there is no switched 12v power at the head unit due to the changes in the wiring from 2000 to 2001. The 2001-2004 head unit is controlled via the Class 2 Data Bus.

[mscottc]

ok thanks do you know were i can get a harness for a 2001 and about how much it would be

[Chipmunk-Alero]

Go to your local walmart and get the Schoshe wiring harness for 99-02, 04 something like that general motors. Should have Grand Am/Alero listed on the back. U still need to tap a fuse for acc power if u want it.

Someone correct me if im wrong. Im buzzed....

[mscottc]

well i got the only one walmart had and it was for the 99 and 2000 if i tap the fuse what fuse would i tap ???

[jayson_waltz]

^any that has power with the key in acc or on but not when in off. you will need a tester.