Question about 1983 Nissan Pickup

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Need to find fuseable link for the alternator,my new one will not charge thinking either link or broken wire.can youhelp me.had the new alt checked out it test good;i own a 1984 nissan p/u

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  • Anonymous Aug 02, 2008

    yea rvsr i have the same problem. my alt checked out fine as well and i don't know what else it could be....i'll let you know if i find out

  • mike bennett Feb 05, 2013

    where is

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The fuseable link is at the battery + terminal. just pull on the soft rubbery type wires to see if it streaches if it does its u/s you can bare the wires and re twist them to get you out of troble for a short time....

Posted on Aug 05, 2008

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1 Answer

Why doesn't new alternator charge battery?


Some cars have a fuse for the alternator instead of link. The belt is on correct and all connections are tight? What's voltage while running? Year model?

Mar 10, 2016 | Cars & Trucks

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Battery light alternator


The Charge lamp comes on with the Alternator fails to keep battery charge going. (lots of way to fail, and ALT Is 100% good) it's a system. each part of it must be good, end to end.
so...
i put my voltmeter across battery, i start car, i see 13.3 to 15vdc, alt is good.
no? , i see now, 12.2v. ALt is dead, (i didnt say bad) and battery is sightly discharged, 12.6v is charged. (key off, rested voltage)
This 12v tells me the ALT is shut down. only why is the question.

how can any charge system fail,
bad battery tops the list here, they LOVE to fail.
1: belt slips.
2: belt missing
3: bad alt.
4: bad wires to ALT . (corrosion on any wire or lug)
5: fuses blown , any listed below.:
your alt is not an ECU controlled, alt ,its 100% self contained

did you ever remove the ALT and blow the 100 amp fuseable link
the first step of any alt pul, is the pull the NEG, battery lug or BOOM.

im logged in to alldata.com so can you.

and what do i see.
a 5 wire ALT. one is the frame ground, so it must not be rusty or..... it fails. frame to engine block. no rust here.

wire L , yellow.goes to dash LEDs (alt failure idiot lamps) (this works)
wire. S white goes to ALT 5a fuse, is it blown?
wire :B B/G color, goes to the 100 amp link fuse. (blown>?)
wire IG Red-white, goes to a fuse marked 10A gauge.

i think the IG wire is the voltage sense wire.
no sense, no charge. I think the whole I/P dash cluster goes dead when this fuse blows.

The S wire is the boot strap voltage sense, it wakes up the regulator .
if open , the reg stays asleep, as does ALT.
Alternators can not self start, the regulator has boot strap device
that cures that. called self excitation. so this wire is critical.
All wires except the L wire is critical. in this case.

the B wire is the big wire, it charges the battery . 50amps or more..

any of the 5 paths open , kills the ALT dead.
The REG inside the ALT can also shut it down.
eg: battery bad, with huge cell resistances. total.
eg: overvoltge for any reasons. including attempts top run car with no battery, (dont ask)
eg: over current (battery cells 1 to 6 shorted) or 25 KC lamps added.
eg: over temperature shut down.

that is about it.







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1 Answer

Charging system diagrams for 2002 dodge dakota


There is 4 gauge black/red wire going from te alternator to Fuse #2 in the PDC. The alternator and battery both connect (positive side) at this point. The alternator's path to charge the battery is from the alternator, to this tie point, then to the battery. In the wire, between the alternator and the PDC tie point, is a fusible link. This link may have broken or melted. That would keep the alternator from being able to charge the battery. I would check this wire for continuity and replace the link if necessary.

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make sure battery connetions are good and there is a fuseable link from red wire at alt follow wire back to battery youll find it broken

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Battery warning light is on after a new battery and alternator on a 2000 grand voyager


There should be a fuse or fuseable link between the battery and the alternator.
Check the voltage at the battery wire on the back of the alt - should be 12 volts or more.
The alternator is turned on by the ASD relay and the computer.
If the engine is running I will assume the relay is working.
If you have battery voltage on the big wire and the alternator is not charging, you could have a problem with the computer.

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1 Answer

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There is a fuse or fuseable link between the alt and battery, and the alt gets a signal from the key to activate the voltage regulator.
I would check for batt voltage at the alternator and you may need a wiring diagram to check for key voltage.

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1 Answer

Blowing fuseable links from starter to alt, (well one) the gage is smaller then the OEM, however would a bad starter cause this fuseable link to fail, as the altenater is brand new


If this link runs from the alternator to the starter then i would say it likely but i belive the connection is to recarge the battery, the link that runs from the alt to starter connects to starter with another cable that runs to battery, so this link is used to charge the battery, heres a wiring diagram to show you. i would say its morelikely that the problem may be a bad alternator or the wiring from alt to starter is shorting. follow the wire (fuseable link) from alternator to starter and check it for shorting onto something, if nothing found then iwould say its the alternator or starter. to make sure which is the problem, when the link pops can you start the car, will starter spin over the engine if the answer is yes then replace the starter but if the starter doesnt spin engine with blown link then replace the starter, here are the wiring diagram to help.johnjohn2_148.gifjohnjohn2_149.gif

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1 Answer

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1 Answer

Not getting charge out of alternator and it is good alternator wiring seems to be in good shape what else could cause problem relays how can you tell if good


If you're not reading a charge(13+ volts)at the battery, but you have voltage output from the alternator. There are 2 fuseable links, 1 is in line with the red battery wire from the stud on the
alternator to the starter. This link can be bypassed by running a wire from the alt. stud to the pos+
post on the battery. The other fusable link is in line with the red stator wire from the regulator plug.
Check these links and repair or replace if needed. Hope this helps.

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