lolpartscar
Member
Hey guys, first post on the forums.
Bimmerfag/Subahoe here and I feel like I got in over my head with this one.
Owned 1408 for about 3 months now and surprise surprise the alternator went bad. So i got a new (reman) alternator from O'Reilly's (inferior, I know, but I'd rather keep replacing them for free under lifetime warranty than get a good one that will last longer with no warranty) and after the install it will not stop blowing 100amp alt fuses. As soon as I connect the battery it will blow. Connect ground first, it blows, connect power first, it blows. The amp is an "ultima" brand amp #15634. I already looked it up to make sure it was indeed a 90amp and it is. Everything is connected correctly, exactly as it was before before the old alt blew. The old alt was also a 90amp I'm assuming becasue the fuse that was in the alt spot was 100amp before I did anything. I don't know what is going on because everything worked correctly except the alternator before, and now I have all kinds of problems.
Car still starts and runs but the idle surge is worse now. It could just be the ecu resetting because I had the battery out for so long though. It used to just do it on startup and once the car was warm it would go away, pretty mild and I was going to get to fixing it once I had some time. Other symptoms include no clock, radio, glovebox light, door lights, dome light, or auto seatbelts. I found a fuse diagram that shows those being in spot #17 on the interior fuse box, but I haven't gone and checked it yet because I want to figure out this alternator fuse first.
I've searched a lot and not found anything like this except on some DSM forums, and none of the threads I found came to a conclusion. I don't usually like posting on any forums because I can usually find my questions already answered somewhere but with this I have had no luck. So please if anyone has had this issue before when replacing an alternator help! Otherwise I'm going to have to poke around with a multimeter or just sell the car... I don't really have money to pay someone to fix it but I do have my summer car that I wish could stay in the garage this winter but it might need to come out for DD duty if I can't figure this out.
Thanks in advance,
A stupid BMW guy
Bimmerfag/Subahoe here and I feel like I got in over my head with this one.
Owned 1408 for about 3 months now and surprise surprise the alternator went bad. So i got a new (reman) alternator from O'Reilly's (inferior, I know, but I'd rather keep replacing them for free under lifetime warranty than get a good one that will last longer with no warranty) and after the install it will not stop blowing 100amp alt fuses. As soon as I connect the battery it will blow. Connect ground first, it blows, connect power first, it blows. The amp is an "ultima" brand amp #15634. I already looked it up to make sure it was indeed a 90amp and it is. Everything is connected correctly, exactly as it was before before the old alt blew. The old alt was also a 90amp I'm assuming becasue the fuse that was in the alt spot was 100amp before I did anything. I don't know what is going on because everything worked correctly except the alternator before, and now I have all kinds of problems.
Car still starts and runs but the idle surge is worse now. It could just be the ecu resetting because I had the battery out for so long though. It used to just do it on startup and once the car was warm it would go away, pretty mild and I was going to get to fixing it once I had some time. Other symptoms include no clock, radio, glovebox light, door lights, dome light, or auto seatbelts. I found a fuse diagram that shows those being in spot #17 on the interior fuse box, but I haven't gone and checked it yet because I want to figure out this alternator fuse first.
I've searched a lot and not found anything like this except on some DSM forums, and none of the threads I found came to a conclusion. I don't usually like posting on any forums because I can usually find my questions already answered somewhere but with this I have had no luck. So please if anyone has had this issue before when replacing an alternator help! Otherwise I'm going to have to poke around with a multimeter or just sell the car... I don't really have money to pay someone to fix it but I do have my summer car that I wish could stay in the garage this winter but it might need to come out for DD duty if I can't figure this out.
Thanks in advance,
A stupid BMW guy