jcaploe Posted May 29, 2015 Report Share Posted May 29, 2015 I need help! I have no power coming off the battery. The battery reads 12.56volts but nothing seems to be going anywhere else. It started with a no start at the market. My girl jump started me and I got home no problem. Found that the battery was dead. Replaced it. Still nothing. Started looking around and found a fried ground wire from the alternator to the voltage regulator body mount bolt. replaced the wire and still nothing. Anyone? Quote Link to comment
datzenmike Posted May 30, 2015 Report Share Posted May 30, 2015 First... stop replacing things. Battery was likely fine now you have a new one you don't need. Find the problem by solving the clues. Do the headlights work? If NOT... There is a fusible link connecting from the starter positive lug to both the ignition switch and the fuse box directly. If headlights are non working this fusible link is likely blown. Another possibility is the ground from the battery to the body, likely the one you found on the voltage regulator. A good tool for troubleshooting is a $5 test lamp... it can 'see' invisible electricity. Quote Link to comment
Dolomite Posted May 30, 2015 Report Share Posted May 30, 2015 Mike is very correct, I've fixed nearly all the electrical systems in my 510 using a cheap test light. Quote Link to comment
datsun 160J SSS Posted May 30, 2015 Report Share Posted May 30, 2015 fusible link or main harness ground loose . use your test light :thumbup: Quote Link to comment
banzai510(hainz) Posted May 30, 2015 Report Share Posted May 30, 2015 Sometimes new bat cables are needed. I had a - batt cable go bad. This will happen under load like when starting. the ends maybe be dirty or cracked. I would pull the alt and have it load tested.fix the blk wire to volt reg and ck the fuses also. this isbasic stuff that may or maybe not related to your proplem but I ck everything. as mike said power will feed to the fuse box via the fuasable link(round lug on starter) which is just a colored wire design to melt if overloaded. mybe good to get a spare volt reg also. Quote Link to comment
jcaploe Posted May 30, 2015 Author Report Share Posted May 30, 2015 Do I need to have the battery hooked up to use the test light? Quote Link to comment
jcaploe Posted May 31, 2015 Author Report Share Posted May 31, 2015 I'm not sure what I'm supposed to be checking with the test light. Quote Link to comment
datzenmike Posted May 31, 2015 Report Share Posted May 31, 2015 To find, follow or check for 12 volts, (battery) connect the alligator clip to any ground. Touch the probe end to any bare wire or terminal. If there is power present the lamp will light. Try the battery terminals to check the battery has power. If the lamp lights this is good. Now try the starter lug wher the positive battery cable connects... it should light. Connected to the starter lug with the battery cable should be a fusible link wire, probably Red. You should have power on either end. If it looks melted or is missing it's likely blown just like a fuse. Quote Link to comment
jcaploe Posted June 1, 2015 Author Report Share Posted June 1, 2015 The battery is charged to 12.58 volts. Checking the starter with the test light as you explained, it does not light up. The red, fusible link coming off the starter lug is in tact and connected to a white/black wire that appears to the fuse box. Quote Link to comment
banzai510(hainz) Posted June 1, 2015 Report Share Posted June 1, 2015 the red + off the batter goes to the starter lug it should light up!!!!!!!! then the fuseable link lug will go up to the fuse box. one side of the fuses should light up. Quote Link to comment
datzenmike Posted June 2, 2015 Report Share Posted June 2, 2015 If no power to the starter then it can't go any farther can it? I assumed you would have cleaned the battery terminals and made sure they are clean and tight. Do both as a circuit also includes the negative side. The negative cable bolts to the head just behind the fuel pump. Did you test across the battery cables on the battery? This would tell you that the cables and posts need cleaning. To find, follow or check for 12 volts, (battery) connect the alligator clip to any ground. Touch the probe end to any bare wire or terminal. If there is power present the lamp will light. Try the battery terminals to check the battery has power. If the lamp lights this is good. Now try the starter lug where the positive battery cable connects... it should light. Connected to the starter lug with the battery cable should be a fusible link wire, probably Red. You should have power on either end. If it looks melted or is missing it's likely blown just like a fuse. Quote Link to comment
jcaploe Posted June 28, 2015 Author Report Share Posted June 28, 2015 Finally tested the battery cables. With the cables hooked to the battery and the other ends not bolted to anything, my voltage meter says there is 12.49 volts flowing through the battery/cables. Did the same test with the light, the light did not light up. Quote Link to comment
datzenmike Posted June 28, 2015 Report Share Posted June 28, 2015 The lamp appears to be burned out. Always test the lamp first before checking any wires for voltage. Quote Link to comment
jcaploe Posted June 28, 2015 Author Report Share Posted June 28, 2015 the test lamp works fine on the battery Quote Link to comment
datzenmike Posted June 29, 2015 Report Share Posted June 29, 2015 Then the cables are not tight or they are dirty. Clean and tighten them. The meter is likely a digital one and draws vanishingly small amounts of power. The test lamp needs 5 or more watts. Quote Link to comment
jcaploe Posted June 29, 2015 Author Report Share Posted June 29, 2015 meter is digital. cables are tight, all connections spotless Quote Link to comment
jcaploe Posted June 29, 2015 Author Report Share Posted June 29, 2015 someone mentioned that there is supposed to be a ground from the block to the body. is this true? Quote Link to comment
datzenmike Posted June 29, 2015 Report Share Posted June 29, 2015 Yes or from the negative cable directly to the body. Either is good. Quote Link to comment
datzenmike Posted June 29, 2015 Report Share Posted June 29, 2015 meter is digital. cables are tight, all connections spotless Then one of the cables is bad. Quote Link to comment
banzai510(hainz) Posted June 29, 2015 Report Share Posted June 29, 2015 buy new batt cables Quote Link to comment
KoHeartsGPA Posted June 29, 2015 Report Share Posted June 29, 2015 How did you "clean" the terminals? I always use a fine piece of sandpaper to clean the battery poles, and a round wire brush to clean the battery cable terminals, the wiring on 510 are among the simplest to trouble shoot (as long as it hasn't been molested) it'll be something very simple. YouTube has very detailed tutorials if you don't understand what we're talking about. Quote Link to comment
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