PetesPonies Posted June 20, 2008 Share Posted June 20, 2008 1982 ZX, non Turbo . . .The car battery went dead . .drained while the car sat for a few weeks. When I went to jump start it, it still had a huge electrical draw. The battery jumper cables became hot immediately and the ACC fusible link burned out in the box right next to the battery. Smoke rolled So I'm looking for an experienced idea as to what may be creating this huge amperage draw in this circuit? Is the alternator in anyway involved in this link? I know an alternator draw/short can be huge and drain down a battery in no time with it off. I run into that on my Fords from time to time. Not sure about the Datsun. I'm looking for a place to start if someone has had a similar experience. Thanks Quote Link to comment Share on other sites More sharing options...
xenonxiii Posted June 20, 2008 Share Posted June 20, 2008 Sounds to me like the cables were connected backwards. Quote Link to comment Share on other sites More sharing options...
PetesPonies Posted June 20, 2008 Author Share Posted June 20, 2008 well no . . I'm an automotive professional. I run a restoration shop and teach auto tech. So . . I know how to attach cables. I was looking for some serious experience here from someone. I am not familar with the Z like I am with the cars I build. I was turning to the experts here. But please understand I know what I'm doing. Remember the part where the battery got drained while the car was parked . . . Quote Link to comment Share on other sites More sharing options...
xenonxiii Posted June 20, 2008 Share Posted June 20, 2008 The Reason I sad the cables were connected backwards is this is a very common thing. Otherwise there is a Dead short in that circuit causing the cables to get hot and the link to blow. If you haven't already done so, You can download the 1982 FSM from my site and check the EL section. It has all the information you will need to find the short Quote Link to comment Share on other sites More sharing options...
PetesPonies Posted June 21, 2008 Author Share Posted June 21, 2008 Well what I see first , looking at the schematic, is that the alternator is fed through a fusible link. When I saw the draw there was on my car, that came to mind forst as I earlier explained. So . .still no one has had this problem before? No internal alternator shorts from the Datsun crowd?? Quote Link to comment Share on other sites More sharing options...
Xander Posted June 21, 2008 Share Posted June 21, 2008 looking at the schematic, is that the alternator is fed through a fusible link Technically it is the other way around. With the engine running the alternator is feeding the battery via a fussible link. A drained battery can also pull a great amount off amps. That is why it is recommended that a completely drained battery is charged off the car. Quote Link to comment Share on other sites More sharing options...
PetesPonies Posted June 22, 2008 Author Share Posted June 22, 2008 But what happens when an alternator internally shorts is it draws back through the fusible link. I'm guessing no one here has any experience with this happening. A shorted starter will draw a huge amount and drain a battery completely in no time. Its an easy thing to check . . unplug the alternator and check to see if you still have an amperage draw. I just have been very busy with other things and haven't checked it yet. While on the computer I thought I would see what others have run across. Quote Link to comment Share on other sites More sharing options...
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