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1979 280z fusible links

This is a discussion on 1979 280z fusible links within the Help Me !! forums, part of the CARS category; im having troubles keeping charge to my 280. i had the battery and alternator checked. the starter also. whats happening ...


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    Default 1979 280z fusible links

    im having troubles keeping charge to my 280. i had the battery and alternator checked. the starter also. whats happening is i have to jump the car. once its started and im just sitting there idleing its fine, but once i drive for a while my battery starts to die as if the alternator isnt helping it. i checked one of the fusible links and it was dry rotted so im guessing the others are too and they all need to be replaced. would that make sence for whats going on? if im right... where can i get the links. or is there a amp fuse i can use and just get rid of the wires? my e-mail is tim_7_2000@yahoo.com any and all info is helpful! thanks
    79 280zX with full eibach suspention and independent rear. msd ignition. headers to a cherry bomb....lowered 2 inches. right now black primer. already have pearl black paint with 2 black leather racing seats. IF ANYONE HAS FRONT FENDERS FOR A 1979 280ZX OR FRONT AIR DAM PLEASE E-MAIL ME @ TIM_7_2000@YAHOO.COM THANKS

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    First of all, if you have a 79, it's a 280ZX not a 280Z. I can't tell you much about the fusible links on it because I don't know much about the electronics in a ZX. Your scenario makes sense, however, as one of the links on a 280Z is directly between the alternator and the battery and there probably would be some similarity to the ZX system.
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    This is from a 77. Despite the reputation the japanese have today for electronics, these cars had crap wiring.
    Check the wires running from the alternator all the way to your fusebox. Odds are you'll find something like the pic below. Once the tape came off, the splice crumbled into dust. Oddly enough, everything still worked (most of the time).
    Attached Thumbnails Attached Thumbnails 1979 280z fusible links-imag0011.jpg  

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    Contact PrOxLaMuS©. He's a user on this site. He converted the fusible links in his Z to the Maxifuse block.

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    So have I. I used a 10$ Olds 88 underhood box cut in half Nice silver contacts, btw.

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    No the fusible links have nothing to do with the car losing power they only act as a fuse would and open up when there is a short in electrical system.. Have your alternator checked again,sometimes alternators check o.k. but its a false reading...also clean all wires and connectors on alernator and ground wire.....Randy
    Last edited by randy 80ZX; 09-27-2005 at 02:15 PM.

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    I second what Randy said. A friend had a problem with maintaining a charge. The parts place tested the alternator and said it was fine (internally regulated). I didn't buy the diagnosis and convinced the friend that we should replace the alternator. The problem went away.

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    Maybe these schematics will help you.

    RIck
    Attached Thumbnails Attached Thumbnails 1979 280z fusible links-1979-280zx-chassis-schematic.gif   1979 280z fusible links-1979-280zx-chassis-schematic-cont..gif   1979 280z fusible links-1979-280zx-engine-control-schematic.gif  

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    Randy, as I said, there is one between the alternator and the battery. If that link is blown, you would have charging problems. If they have nothing to do with the car losing power, as you say, then unplug them and see if it runs.
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    Let's start a betting pool!

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    The fusible link is "black " 16guage for alternator approx 80 amps. If one pulls it off ,car won't run., As stated in original post the car is idleing fine therefore this is not his charging problem.

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    Bottom line: fusible link is dry rotted-replace it and others that are bad and go on from there.
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    ok when i save up to get a new alternator ill test it out n see what happens. i still want to replace the links though because the one wasnt looking too good. it was all green inside and stuff. if anyone has a set of front fenders and they wana sell them cheap that would be good. feel free to post anymore info you know or find out. thanks - tim
    79 280zX with full eibach suspention and independent rear. msd ignition. headers to a cherry bomb....lowered 2 inches. right now black primer. already have pearl black paint with 2 black leather racing seats. IF ANYONE HAS FRONT FENDERS FOR A 1979 280ZX OR FRONT AIR DAM PLEASE E-MAIL ME @ TIM_7_2000@YAHOO.COM THANKS

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    It's a ZX, not a Z. I don't mind helping if I can since there are some similar components between the Z and the ZX but call the car what it is.
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    X its a z to me. i like saying z more than zx
    79 280zX with full eibach suspention and independent rear. msd ignition. headers to a cherry bomb....lowered 2 inches. right now black primer. already have pearl black paint with 2 black leather racing seats. IF ANYONE HAS FRONT FENDERS FOR A 1979 280ZX OR FRONT AIR DAM PLEASE E-MAIL ME @ TIM_7_2000@YAHOO.COM THANKS

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    Quote Originally Posted by slaptimmay
    X its a z to me. i like saying z more than zx

    Yes, but Z owners are rather particular of their cars. Besides, you wouldn't call a Bull Dog a Bull Terrier when going to the vet, yes? Proper namesake helps alot in diagnosis.
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    yea i see what ya mean. im the same way when people say the name of my 4 wheeler wrong.
    79 280zX with full eibach suspention and independent rear. msd ignition. headers to a cherry bomb....lowered 2 inches. right now black primer. already have pearl black paint with 2 black leather racing seats. IF ANYONE HAS FRONT FENDERS FOR A 1979 280ZX OR FRONT AIR DAM PLEASE E-MAIL ME @ TIM_7_2000@YAHOO.COM THANKS

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    Try ebay type Datsun 280z and your on your way!

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    Quote Originally Posted by rcperez123
    Try ebay type Datsun 280z and your on your way!
    That's 280ZX!
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    watch out RC they'll bite your nuts off if you dont say it right. other than that they are good, very helpful people.
    79 280zX with full eibach suspention and independent rear. msd ignition. headers to a cherry bomb....lowered 2 inches. right now black primer. already have pearl black paint with 2 black leather racing seats. IF ANYONE HAS FRONT FENDERS FOR A 1979 280ZX OR FRONT AIR DAM PLEASE E-MAIL ME @ TIM_7_2000@YAHOO.COM THANKS

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    calling a ZX a Z is like calling a Fiat a Ferarri.

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    Quote Originally Posted by slaptimmay
    watch out RC they'll bite your nuts off if you dont say it right. other than that they are good, very helpful people.
    Hey, Tim, it's all in fun. I'm just not a fan of any of the 79 and up ZX's. That doesn't mean that you can't be.
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    yea i know what ya mean. whats wrong with the ZX tho. its still sexy. and runs greeaat except for the problem i got goin on right now. what makes the z so much better. ??
    79 280zX with full eibach suspention and independent rear. msd ignition. headers to a cherry bomb....lowered 2 inches. right now black primer. already have pearl black paint with 2 black leather racing seats. IF ANYONE HAS FRONT FENDERS FOR A 1979 280ZX OR FRONT AIR DAM PLEASE E-MAIL ME @ TIM_7_2000@YAHOO.COM THANKS

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    They're lighter, the body differences are striking when compared side by side and just general preference. If you prefer the ZX, then it's better. For you.

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    i dont prefer either. i dont know what a z in these years run like compaired to the zx. if i did i may like z's more. i still love z's. i got to drive a 350z and i creamed my pants. but in those years the zx is all i know so its wut i love. now if any of you would want to let me drive your z then maybe ill be a z lover. i dont think i would get rid of my baby tho. i got plans for it and i dont plan on getting rid of it till they are done.
    79 280zX with full eibach suspention and independent rear. msd ignition. headers to a cherry bomb....lowered 2 inches. right now black primer. already have pearl black paint with 2 black leather racing seats. IF ANYONE HAS FRONT FENDERS FOR A 1979 280ZX OR FRONT AIR DAM PLEASE E-MAIL ME @ TIM_7_2000@YAHOO.COM THANKS

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    Well, lighter is always better and 240-260-280zs are lighter than 280ZXs. By the time the 280z came along in 75, they were already beginning to get heavier. Safety and emissions equipment, air conditioning, etc. With the 280zx add all of that plus power steering and along with the redesign it was just a bigger and heavier car. They were also aiming at a broader market. I'm not sure which year but I believe that on of the 280zxs (79-83) was the best selling of all Zs. My daily driver is a 79 Datsun 810 2dr hardtop. Bigger than a Z, heavier than a Z but it's based on the Z drive train so it still gives you that Z feeling somewhat when you drive it. But again it's not a Z. And even though my Z is a 78 and I love it, I feel that the 'real Zs' are the 70-73.
    Last edited by sblake01; 10-06-2005 at 09:57 AM. Reason: to correct typo
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    Actually, depending upon your reference, the ZX weighed about the same as the 280Z. If you look at http://zhome.com/History/zcarperf.html, you will see a lot of variation in the curb weight.

    My dad's friend gave me a chance to drive his 280ZX turbo back in 1988. (I was checking out his new toy and noticed a tire was low on air. I brought it to his attention, and he tossed me the keys to take care of it.) There was a nice 90 degree turn and a wonderful chicane (now gone) on the road to the gas station. That ZX handled fairly well.

    What the ZX lacks in simplicity, it makes up for in different ways. I wouldn't trade my 73 for a ZX, but I would certainly be willing to add a ZX to my stable.

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    I don't really know if you can draw any conclusions from those charts. Lots of modified vehicles there. Does that also mean that depending on your reference that a 78 280z is faster than a 70 240z? You could draw that conclusion from that chart. Lies, damn lies and statistics! But that wasn't really my point. From 70-83, they became progressively heavier. Don't really need a chart to conclude that.
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    If you do end up replacing a relay or fusible link just be aware of the following as it relates to availability of parts. I was able to obtain 280ZX fusible links from the local Nissan dealer and the prices weren't terrible. Just recently I needed to replace the fuel pump relay for my '78 280Z and Nissan wasn't able to supply one. I called motorsport and after a couple of days they got back to me with a price of roughly $70 from Japan. In the meantime a friend suggested giving NAPA a try (I wasn't expecting much) but, to my surprise the counter person checked in the catalog and we matched my original six prong relay and $36.00 changed hands and a couple of days later the new piece was ready for pickup. The real surprise was when I opened the box to find it was a new piece made by Niles of Japan (the OE supplier to Nissan) with the only difference being the flat black paint on the case as opposed to the cadmium coating supplied from the factory. As a brief aside Olympic auto parts was also able to get a relay but, it was a four prong unit for the same price.
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    Quote Originally Posted by sblake01
    I don't really know if you can draw any conclusions from those charts. Lots of modified vehicles there. Does that also mean that depending on your reference that a 78 280z is faster than a 70 240z? You could draw that conclusion from that chart. Lies, damn lies and statistics! But that wasn't really my point. From 70-83, they became progressively heavier. Don't really need a chart to conclude that.
    Well, I can draw some conclusions from those charts, and I stated at the beginning of my post I was commenting on the CURB WEIGHT of the 280ZX as compared to the 280Z. The data clearly shows the weight was going up from the 240Z to the 280Z. To make it easier for you to read, I eliminated the modified cars and any review that wasn't from Car & Driver, Road & Track, or Motor Trend. I also elimnated the automatic transmission & 2+2 cars to make it more of an apples to apples comparison.

    The curb weight of the 280Z varied between 2780 lbs and 2875 lbs.
    The curb weight of the 280ZX varied between 2825 and 2970 lbs. The last weight was well above the other 4 normally aspirated cars, too.

    So, did the weight go up from the 280Z to the ZX? The data doesn't support a significant weight gain. I would be willing to review any dataset of curb weights that contradicts my assertion. That would be much more convincing than your strawman argument of attacking the data. So, do you have anything to support your point other than "everybody knows the ZX was heavier"?
    -------------------------
    Curb Source
    Datsun 240Z Wght (date)
    -------------------------
    70 Z 2355 RT 4/70
    70 Z 2330 CD 6/70
    --------------------------
    Curb Source
    Datsun 260Z Wght (date)
    --------------------------
    74 Z 2665 RT 2/74
    74 Z 2660 CD 4/74
    --------------------------
    Curb Source
    Datsun 280Z Wght (date)
    --------------------------
    75 Z 2870 CD 6/75
    75 Z 2875 RT 6/75
    75 Z 2830 MT 11/75
    78 Z (5 spd) 2780 CD 7/78
    --------------------------
    Curb Source
    Datsun 280ZX Wght (date)
    --------------------------
    79 ZX 2825 RT 11/78
    79 ZX 2900 CD 1/78
    79 ZX 2850 CD 4/79
    79 ZX 2970 CD 4/80
    81 ZXT 2960 CD 12/81
    82 ZX 2825 RT 82
    82 ZXT 2990 RT 12/82

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    I'm really not that concerned about it. But thanks for making it 'easier for me to read.'
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    you said they had all that plus power steering. my 280zx doesnt have power steering. also we took out the ac. the frame was replaced with a homemade tube chasis my friends dad made at work.
    79 280zX with full eibach suspention and independent rear. msd ignition. headers to a cherry bomb....lowered 2 inches. right now black primer. already have pearl black paint with 2 black leather racing seats. IF ANYONE HAS FRONT FENDERS FOR A 1979 280ZX OR FRONT AIR DAM PLEASE E-MAIL ME @ TIM_7_2000@YAHOO.COM THANKS

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