Question about 1989 Nissan Hardbody King

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1986.5 Nissan Hadrbody wont start.

My 1986.5 Nissan Hardbody wont start, I can push start it but the battery wont charge from the alternator. I have had the alternator tested and it passed all tests twice. I noticed a small green box connected to some wires (that where broken) that go from the alternator pigtail to the fuse relay box (not the battery). My problem is that I cannot find out what this green box is nor can anyone at my local Nissan dealership determine what it is and what it does. My brother said (he is a mechanic) that its a "diode" that controls the direction flow of the electricity in the vehicle but I am having no luck finding out what this part is let alone getting a replacement. Can anyone help?

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2wd? 4wd? engine size? I think what you are referring to is the "fusible links" which are just big fuses inside of a covering that looks like its a wire. Hard to believe that a dealer tech doenst know whats under the hood of a truck they deal with everyday? These usually dont go out for no reason. there is a load on them that is too much. depending which one is bad, you need to ck that circuit for a short.

Posted on Sep 28, 2009


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1986 nissan pickup/suddenly guages quit working and battery light on

It sounds to me like the alternator is not charging the battery sufficiently.

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Break and battery light stays on all the time

sold all over earth, what country> we cant guess this....
don't break the brakes....!!!
my guess, you meant the
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86 nissan PU.
720 PU>? Datsun>?
or D21 Nissan ( 1986 Dat-SUNS became NISSANS. in USA)
Model years 1986.5 (second half) and later were called Nissan Hardbody Trucks, chassis code D21.

D21 are called HARD BODY trucks. mid year changes.
so???? which is yours.

as you might not ,know , the models are wired diffrent by different exact models and country.
long ago , i had the 86 with the VG30 V6...

so i will roll the dice and answer for

things off stay on, 101
bad wiring, hacked in wiring, radios,alarms and other things.
all can cause this..... its old and is common on old cars.
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no hacks.
gas engine car not diesel.
USA 86 body
Im looking now at the schematic and this car has a hot at all times
brake lamp switch. (foot pedal switch)
SO only a bad switch can cause this.... period
now the dash charge (battery ) light stuck on.

my online source ,has the alternator system missing.
so can not comment.
the lamp gets its power from the key switch
if the key switch fails , all warning lanps glow not just the
so its not that
my best guess is wiring errors, that put power the the cluster
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Jul 14, 2014 | 1986 Nissan Pickup 4WD 1986

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1985 nissan 300z wont crank

When you switch the ignition wont start or crank, right? but did you hear a tikiting sound? if you do then the problem was your starter, either the solenoid in your starter was faulty or the starter itself might be grounder or shorted.Replace the solenoid if deffective or starter but before you do that check your battery.
Next is to check your electrical line from the ignition to the starter and also from your battery going to the starter, if there is a connectivity it means your line is good.
Next you said it has to be push to start and run but when you shut it off it wont start? It means your alternator was not charging properly, so it was deffective, the battery lost its power. replace or repair your alternator.
Hope this will help you, good luck!!!

Oct 01, 2012 | 1985 Nissan 300ZX

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If battery and alternator are good is starter solenoid pulling in? it may be that whilst you have a new battery it may require charging new doesn't mean fully charged, batt may have been on shelf for awhile

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My 1997 nissan hardbody charges but not enough to run it I have new alternator and batt wat else could be wrong

Put a voltmeter on the battery when it is running. There should be around 13.5 volts for a proper reading.
A little confused by your request: the battery does not power the car when it is running. The alternator supplies all the power to run everything. The battery is only used to start the car, and is then re-charged by the alternator when running. If the alternator is not putting out enough to run the car, then there might be a loose connection somewhere. Check all battery and alternator connections for clean, tight connections. If good, have the new alternator tested. Sometimes you can get a defective one.

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Your problem is you blew a fusible link. Located in a black box in front of the battery are the fusible links. The one lablled battery is blown. The fusible link is a loop of insulated wire that will melt in cases where too much current is passing throught the wire. You will notice a burnt smell as well. A simple continuity test of the fusible link will show that it is open. Go to a junk yard or order through nissan and you will be good to go. If you make your own make sure of the type of wire and the gauge.

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