I have a 1997 Grand Am and this is what the electric consists of, stock 105a alt, deka primary batt, 1/0 for batt to chassis ground and motor to chassis...havnt yet done alt to batt. My voltage is dropping to 11.5 on some notes, the amp is a saz1500....I need help deciding what else I need to get the voltage up and stable. The XS power d1200 I can fit under the hood as primary but the d5100 is to big and I dont want to do a second battery. Should I get the d1200 or get a h.o. alt, if you guys need any more info please say.

Thanks for any help

For starters, put the wire between the alternator and the battery man. This is probably most of your problem. Do this and report back.

For starters, put the wire between the alternator and the battery man. This is probably most of your problem. Do this and report back.

x2 do this and report back! i have a 95grand am and once i did that all was well again! lol!