Locsteros22 Posted June 2, 2012 Report Share Posted June 2, 2012 Hey guys I'm new to ratsun and datsun in general and I'm hoping you guys can help me. So I recently just installed a new alternator for my 72 510 and after it's installed I tried connecting the battery but all I got was crazy sparks not just those pussy sparks, checked my grounds everything was tight and no wires was crossed, anyone knows the reason behind this? Quote Link to comment
D52E Posted June 2, 2012 Report Share Posted June 2, 2012 If the concern started after you changed the alternator it is possible you may have connected it incorectly. Possibly connecting the heavy gauge battery wire to metal alternator case or connecting the black regulator ground wire to the positive battery cable lug on the alternator back side. Below is a wiring diagram of the charging system. 1 Quote Link to comment
ggzilla Posted June 2, 2012 Report Share Posted June 2, 2012 The alternator may be defective. I would disconnect ALL wires from the distributor, then see if the battery cable sparking is gone. Quote Link to comment
Locsteros22 Posted June 2, 2012 Author Report Share Posted June 2, 2012 My alternator battery wire I hooked up straight to the starter instead of a fusible link is that ok? And my alternator is grounded to thr top of the adjustment ear not connected to the black wire of thr voltage regulator is that also fine? Quote Link to comment
Locsteros22 Posted June 2, 2012 Author Report Share Posted June 2, 2012 Ok nvm a friend told me I need to rebuild my old alt since my car can't handle much amp from a new alt gahh now to cough up more cash for this trash/treasure of a car of mine. Quote Link to comment
ggzilla Posted June 2, 2012 Report Share Posted June 2, 2012 Your friend is wrong. My alternator battery wire I hooked up straight to the starter instead of a fusible link is that ok? No, not OK. If you have a large short, it can burn up the wiring. Use the original style wiring for safety. my car can't handle much amp from a new alt Poppycock. When the engine isn't running, it doesn't matter how many amps the alternator *might* output. It would not cause sparks unless it is defective or miswired. Quote Link to comment
Sealik Posted June 2, 2012 Report Share Posted June 2, 2012 So I recently just installed a new alternator for my 72 510 http://dimequarterly...tech_iralt.html Quote Link to comment
Locsteros22 Posted June 2, 2012 Author Report Share Posted June 2, 2012 Ok ok gotcha I'll try to put the wiring back to the same as thr diagram and i think mu new alt is still a external regulated model so I don't have to do any wire jumping do I? Quote Link to comment
ggzilla Posted June 2, 2012 Report Share Posted June 2, 2012 No wire jumping for the stock type alternator. Examine the alternator. Both have a T-connector, but the stock is marked FN at the terminals and the internally-regulated on is marked LS. 510 alternator Newer alternator Quote Link to comment
ggzilla Posted June 2, 2012 Report Share Posted June 2, 2012 Oh, by the way you can put a 130A alternator in a 510 without changing the wiring harness. All you need to do is fit a larger ground and ALT wire from the the alternator to the battery, along with a suitable Fusible Link. Of course a 510 does not use more than 35A even with all accessories on at the same time. But perhaps youve added stuff like a winch, 10000 watt sound system, and electric heated seats. Which would need more than 35A. Quote Link to comment
Locsteros22 Posted June 2, 2012 Author Report Share Posted June 2, 2012 I wish I even had good seats haha..I have an aftermarket Mitsubishi alt and it's an FN...what gauge wire should I use for ground..and how would I connect the alt ground and regulator ground together Quote Link to comment
ggzilla Posted June 2, 2012 Report Share Posted June 2, 2012 Mitsubishi is original Datsun equipment. So was Hitachi Use the stock 510 ground wire. Has someone modified you wiring harness? The alternator technically does not need a ground wire, as it will ground through the case, bolt/brackets, engine and engine ground. But the voltage regulator may need the stock ground wire. Quote Link to comment
Locsteros22 Posted June 2, 2012 Author Report Share Posted June 2, 2012 Yeah I got the car pretty much stripped and wiring been cut and used different wires...except for the ground idk off it's stock I should take some pics after work. Quote Link to comment
banzai510(hainz) Posted June 2, 2012 Report Share Posted June 2, 2012 if you see the volt reg on the strut then hopefully you got a external alternator. If was working before then should be just a swap. 510 wiring is pretty basic Dont need a G E D to figure this out Quote Link to comment
Locsteros22 Posted June 2, 2012 Author Report Share Posted June 2, 2012 Yeah I got the car without a regulator so I got one for it but I guess it was too late so the old alt died...everything seems to hook up pretty much like on the diagram except for the volt reg and alt grounds Quote Link to comment
ggzilla Posted June 2, 2012 Report Share Posted June 2, 2012 Then run two ground wires to some bare-metal spot on the engine, like a timing cover bolt. If that is the problem, everything will start working. Try it. But it won't stop a sparking issue. I would disconnect ALL wires from the alternator, then see if the battery cable sparking is gone. Yes? No? What happens if you disconnect ALL wires from the alternator? Quote Link to comment
Locsteros22 Posted June 2, 2012 Author Report Share Posted June 2, 2012 I disconnected all wire from alt and no more sparks...I was thinking it was a ground issue but now I'm not too sure if they sold me a new/broken alt Quote Link to comment
ggzilla Posted June 2, 2012 Report Share Posted June 2, 2012 Take it back, the store will test it. Quote Link to comment
Locsteros22 Posted June 3, 2012 Author Report Share Posted June 3, 2012 Ok so they tested it and it's good...but guy recommended me to put an extra ground from the alt to the chassis together with the one on the motor...I have high hopes for this one Quote Link to comment
ggzilla Posted June 3, 2012 Report Share Posted June 3, 2012 Don't get discouraged if that doesn't stop the sparks. But it will help forestall other problems. Quote Link to comment
Locsteros22 Posted June 3, 2012 Author Report Share Posted June 3, 2012 Thanks all for all the help..will post once I try things u said Quote Link to comment
ggzilla Posted June 3, 2012 Report Share Posted June 3, 2012 Make sure the battery cables are not reversed. Normally the red one goes to the POS terminal, but if the wiring is messed up, better to check it. Cable that goes to starter connects to POS battery terminal Cable that goes to engine block connects to NEG battery terminal You might even find that your old alternator is fine. They don't go bad because the regulator is missing. But they don't work right if the wiring is messed up. Quote Link to comment
Locsteros22 Posted June 7, 2012 Author Report Share Posted June 7, 2012 Ok so I just put an extra ground from the alt to the chassis but still fireworks I don't know what to do anymore I'm going crazy trying to find what can be causing this, was going to post pics to let u guys have an idea of what im dealing with but I can't do it through my phone . I know wiring for a 510 isn't complicated but it's driving me nuts. Quote Link to comment
ggzilla Posted June 7, 2012 Report Share Posted June 7, 2012 Like we said ... ground wires have nothing to do with sparks. Are you ready to troubleshoot the problem now? Quote Link to comment
ggzilla Posted June 7, 2012 Report Share Posted June 7, 2012 I disconnected all wire from alt and no more sparksThe next step is to figure out which of the four wires to the alternator is causing the sparks. E wire A wire FN (T-connector) has two wires With all wires disconnected, connect them one at time. Start with the E wire. If no sparks, touch the A wire to the A terminal. It should not spark. If it does, it indicates either 1) the wire has a problem, or 2) the alternator has a problem. Do the same with A wire disconnected, try the T-connector. Does that T-connector wires spark? Once you narrow down which wire(s) spark, then you can trace the problem more specifically. Alternator wiring is super simple -- just four wires! Take it one step at a time and resist the urge to take shortcuts in the process. Shortcuts sometimes work, but often take longer and get you sidetracked. 1 Quote Link to comment
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