K, Im gonna fix it but i need everyones input

Discuss topics related to the CA18DE and CA18DET series engines.
nab911
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Car: 93 Nissan 240SX SE

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Im going to spend time tommarow getting my ca running and to the point of where i can sell the car. If i can get the ecu rewired, my only problem is that it will start with jumper cables attached but will die shortly after they are removed. I just had the alternator rebuilt so that cant be the problem. Any ideas guys??


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biosehnsucht
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theres supposed to be some fuse between alt and battery IIRC, check all the wiring from alt to bat and the other wiring that goes to it.

also, tried changing batteries?

nab911
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Well the battery is relativly new but i hooked jumper cables up to it backwards a while ago so it could be messed up. I may just go pick up another and pray. Could a bad battery be causing a problem like this? I always thought that if your alternator was good you could just unhook the battery and it would still run....

boost_boy
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nab911 wrote:Well the battery is relativly new but i hooked jumper cables up to it backwards a while ago so it could be messed up. I may just go pick up another and pray. Could a bad battery be causing a problem like this? I always thought that if your alternator was good you could just unhook the battery and it would still run....
It shouldn't, especially if your alternator is performing the way it should. Your issues are in the chasis wiring. You've knocked out a fusible link and it's killing the power between the alternator and battery.

Dee

nab911
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Ok... so this fuse... where is it? On the transmission harness between the alt and battery?

boost_boy
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nab911 wrote:Ok... so this fuse... where is it? On the transmission harness between the alt and battery?
Where's your batter mounted? If your batter is mounted in the front, it's right there on your positive harness. It will be the plugs that plug into the positive battery connector. Those are fusible links.......

Dee

nab911
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Oh those little black and orange boxes... ill open em up and take a look . Are they fuses and if not do i just pick up some new ones from the AZ? Yeah the bat is up front.

boost_boy
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nab911 wrote:Oh those little black and orange boxes... ill open em up and take a look . Are they fuses and if not do i just pick up some new ones from the AZ? Yeah the bat is up front.
They are not fuses! They are fusible links. The wires that you see leading up to the connectors are like fuses. When they burn out, you can't tell unless you either probe them with a continuity tester or splice into link to see if either got smoked.

Dee

nab911
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Lol Dee we got this. Can i just open the boxes up and look at the wires or do i need to turn the key to the on position, and use a lighted line tester?

boost_boy
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nab911 wrote:Lol Dee we got this. Can i just open the boxes up and look at the wires or do i need to turn the key to the on position, and use a lighted line tester?
You can open them up if you want, but there isn't really much to open up. If you can, just go get some from a junkyard as I'm pretty sure that's your issue. Fusible links are tricky and not too many do-it-yourselfers immediately attack that area when they come across an issue similar to yours.

Dee

nab911
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Excellent dee! Well i have 2 extra transmission harness already so ill see what i can find out... your a life saver!

boost_boy
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nab911 wrote:Excellent dee! Well i have 2 extra transmission harness already so ill see what i can find out... your a life saver!
I like helping with the more complicated issues and this one definitely qualifies. I hope you get this sorted out, but if not, rattle my cage and I'll get a CA powered 240 so I can walk you through via phone call.

Dee

nab911
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Sure thing! Thanks again

nab911
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Car: 93 Nissan 240SX SE

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WOOOHOOO i got it running again!!! But it wont stay running. Dee, those fusable links, are they the part connected to the battery terminal or the actual plugs on the wires? I pulled out the plugs but they were covered in nasty white goo... not sure what it is.

originalsin
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the nasty white goo is like an electial lube er sumthing from the factory i found that on many fuses and such, its normal

nab911
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Car: 93 Nissan 240SX SE

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Ok then one problem down, now.. .the fusable links... do i replace the plugs or the sockets connected to the battery terminal?

nab911
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Car: 93 Nissan 240SX SE

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Autozone carries these things but i need to know what amperage... so dee... what is the amperage on both and ill just get both of em.


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