major electric problems 96 nissan p-up

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Old 04-14-07, 11:25 PM
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major electric problems 96 nissan p-up

someone give me this truck and now im finding out why.
1st it was blowing headlights and breaking alternator belts i changed the alternator it seemed to fix the those problems . but now i have no blinkers and i have very lilttle power and wont start. is this a hot wire touching or could this be a groung wire, and how could i tell the differnce? anyone that could help would be a god send. oh i dont have any flashers or dash lights
either.

hoping for some help
 
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Old 04-15-07, 05:00 AM
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First of, check all fuses with a test light or a volt meter, than check fuses and fusible links at Battery Positive cable, take a close look at those fusible links, they come in different color green, tan, black.... and about 2-3in long, also check the connection at the Alternator again and the condition of the Battery.
 
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Old 04-15-07, 03:48 PM
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im gonna double check

i have checked all that you have suggested except fusible links im not really sure how to check them. i have the hanyes book and it says to look for burnt or melted fusible links. they look like their just dirty. however i will double check all just to make sure .thank you for your quick responce. im not sure when i will have time to check this out , i just hope you might be able to help once ive double checked.

thanks again
 
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Old 04-15-07, 05:02 PM
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On the fusible link, you can check it just like convensional fuses, test light/voltmeter from end to end and or you can check them by feeling the softness of the burnt link or just give it a gentle pull with your finger, they will break off if they blown, post back when you get a chance and I'll try my best, there are more knowledgeable people than me on this board and I'm sure they will chime in too. Good luck to you.
 
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Old 04-15-07, 09:30 PM
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awesome

i think this site is awesome ive been dealing with this problem for a while and im not gonna be happy until i understand what the problem is . its eating away at me . cause i feel like i should have figured it out already .it someting simple thats i am looking over ii i bet
thanks
 
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Old 04-15-07, 10:03 PM
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as far as a bad ground goes. you could go from neg. batt. term to body and from neg batt. to eng. block also check the conn. on the ones already in place clean the conn. it might not be a ground but rusty corroded connections can be a problem. also where the batt. starter and fuse box wires connect together. seen this on boats many times [salt water] even tho they look clean and tite wire brush them to get a good conn.
 
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Old 04-16-07, 05:47 PM
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another piece to puzzle

hey guys,
got home today and put new battery in and it had good power but wouldnt start. i havent had time to check starter but i noticed when i was walking away that my front blinker lights were on , very dim light and no key or switch was on
could this be a hot wire touching the body or other wires along the blinker wiring harness cause at this point im not even sure anymore
.. i really appreciate the help cause i dont have time to figure this out . i work from dawn to dusk then come home to 2 small children .thats a typical day for me. everyday.. so thank you all very much
 
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Old 04-16-07, 09:07 PM
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i am not sure about your wiring problems but i will tell you what i learned about my nissan p/u starters...

you have to make sure the housing of the starter that touches the block needs to be clean... if it is not it will act like its not grounding and wont turn the motor over.. sand it with fine sandpaper or a wire wheel

a suggestion for your signal lights is to check the bulbs,sockets and wires, they are famous for corrosion and breaking...

most likely as you stated, you have a hot wire touching somewhere...again i would check the signal wires for breaks there... thats probably where it is
 
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Old 04-24-07, 08:12 PM
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more pieces

hi guys.
i was checking wires under dash when my dash lights came on. so now my dash lights and turn signal lights are on when no switch is on and with no keys.so i started removing fuses 1 by 1 to find out where the power was coming from and when i removed hazard fuse they went off. does this sound like the hazard hot wire is where the power is coming from or could it be a fuseable link. and how is this wire effecting all these different things?

could it be the brain doing all this?

thanks for all the help.
fmw2525
 
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Old 04-25-07, 03:33 AM
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Reinstall the hazard's fuse and disconnect the Hazard flasher (not the turn signal flasher) and see if things back to normal.
 
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Old 04-25-07, 06:36 AM
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doesnt work at all

from what i understand without the hazard switch in nothing will work i have just 1 flasher unit that works both blinkers and hazards
 
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Old 05-02-07, 07:06 PM
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loose starter

hey guys i finally had chance to check the starter and i found out that the starter was loose and wasnt getting a good ground. also found out that it has went bad. i havent had chance to replace it yet , but do yall think that the lack of ground could have caused all my electrical woes ? i have checked all the wiring and cant find any problems. although i have figured out how to check the continuity in these circuits , just havent had the time.

thank you all
 
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Old 05-03-07, 03:51 AM
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Loose starter and or ground at starter will causes the starter not functioning correctly and may damage the starter itself but I honestly don't think it's causing the whole electrical woe in your truck, there are more than one ground point on the truck, the Neg battery cable is ground at the battery, the chassis and the engine block, then you have engine block to chassis too.

You may have more than one problem, try to isolate each problem is not easy, I'd fix something obvious first then see what it does and doesn't.

Can you turn the engine by hand?.
 
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Old 05-03-07, 11:51 AM
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Talking Voltage drop

Anytime you have voltgage problems it is a good idea to use a voltmeter and check voltgage drops across any length of wire, a connection or part. A voltmeter should be connected with the red lead toward the positive post of the battery and the black toward engine, body or frame ground. For instance say you wanna see how much voltgage a tail light is using, set the voltmeter to 15 or simular DC volts and hook the red lead to the hot terminal on the tail light. Hook the black lead to the negative terminal of the tail light. Each and every connection, wire, etc should only use a small amount of voltgage, if you have a big reading when checking voltgage drop you have a wire, connection, part consuming too much voltgage. Too find out exactly how much? You must use OHM's law. Voltgage = Amps x OHM's (resistance). When the resistance goes up, say to corrosion or a loose connection the voltgage and/or amperage could go up. A short to ground and the part is bypassed and the amperage will go up and blow a fuse or breaker. Shorts between 2 or more circuits and they may find a ground anyway they choose, whichever is the better and quicker one. Most likely right to the frame. That current can flow through just about anything it wants finding a ground back to the source...battery or alternator. I am almost positive a loose starter would cause all kinds of problems since there is a usually a really big wire on it and all the current needs a good ground or it will search for one elsewhere and burn up anything smaller in its path+
 
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