Hern88ndez Posted January 7, 2014 Report Share Posted January 7, 2014 What up members! So today I bought my 620 and well I was happy, it's dope, smooth, cool etc.,etc. drove it all day today and showed it of to All my friends and it felt grate to have something special. With the motivation to drop that bitch low and throw some 15's on them hoes. Went to dinner with my girlfriend and well we left and the truck dies. It did not make any turn over noise when I turned the key. It's not the battery for sure. Member I'm new to datsuns don't know shit about it, I'm asking y'all for your help to get my 620 back an running I'm assuming that it could be a fuel pump problem but again idk. Please Advise, lay me with your knowledge. Thanks Quote Link to comment
Cpl620 Posted January 7, 2014 Report Share Posted January 7, 2014 The relays in the engine bay can some times cause a short. also, check your grounds, on your battery for sure. if you turn the key and the lights dim, but your starter wont turn, you have a lose ground more than likely. if all else fails, smack your starter with a hammer, or you may have a dead starter.... 1 Quote Link to comment
datzenmike Posted January 7, 2014 Report Share Posted January 7, 2014 . It did not make any turn over noise when I turned the key. It's not the battery for sure. Member I'm new to datsuns don't know shit about it, I'm asking y'all for your help to get my 620 back an running I'm assuming that it could be a fuel pump problem but again idk. Please Advise, lay me with your knowledge. Thanks . Honk horn.... if loud as normal battery is likely fine. If dark out put the headlight on. If bright, the battery is still charged enough to crank the motor over. A fuel pump problem will not prevent the motor from being turned over by the starter. If the battery is dead you may have a charging problem. Let us know what you find. Quote Link to comment
Hern88ndez Posted January 7, 2014 Author Report Share Posted January 7, 2014 . Honk horn.... if loud as normal battery is likely fine. If dark out put the headlight on. If bright, the battery is still charged enough to crank the motor over. A fuel pump problem will not prevent the motor from being turned over by the starter. If the battery is dead you may have a charging problem. Let us know what you find. Thank you, I will let y'all know as soon as I try the things that y'all advised. Quote Link to comment
Hern88ndez Posted January 7, 2014 Author Report Share Posted January 7, 2014 The relays in the engine bay can some times cause a short. also, check your grounds, on your battery for sure. if you turn the key and the lights dim, but your starter wont turn, you have a lose ground more than likely. if all else fails, smack your starter with a hammer, or you may have a dead starter.... Thank you, I will try and let you know what the issue is thank you for Your advise. Appreciate a mill Quote Link to comment
aztekkuztumz Posted January 7, 2014 Report Share Posted January 7, 2014 I followed what datzenmike advised and it all worked out for me.i had the same issue today. Mike recommended to clean all ground terminals. Specially the one that bolts on to the head. Once done you should be ok. Again this worked out for me. Thanks mike. 1 Quote Link to comment
Hern88ndez Posted January 7, 2014 Author Report Share Posted January 7, 2014 I followed what datzenmike advised and it all worked out for me.i had the same issue today. Mike recommended to clean all ground terminals. Specially the one that bolts on to the head. Once done you should be ok. Again this worked out for me. Thanks mike. Thanks aZetekkuztumz for the positive reinforcement, I will try that. Quote Link to comment
JuicyRed Posted January 8, 2014 Report Share Posted January 8, 2014 Voltmeter and test. It will be your best tool in your tool box usually Quote Link to comment
Hern88ndez Posted January 9, 2014 Author Report Share Posted January 9, 2014 To explain further this is what I found. The fuel pump is not priming but the battery is fully charged and is pushing out 12.5v when the engine is off, also the Ground terminals are fine. Any thoughts? Quote Link to comment
JuicyRed Posted January 9, 2014 Report Share Posted January 9, 2014 Hmm bitch Dennys is good Quote Link to comment
Hern88ndez Posted January 9, 2014 Author Report Share Posted January 9, 2014 Hmm bitch Dennys is good Idk how that helps my situation JuicyRed Quote Link to comment
Hern88ndez Posted January 9, 2014 Author Report Share Posted January 9, 2014 What is the output in the main relay of a 78 620? Quote Link to comment
datzenmike Posted January 9, 2014 Report Share Posted January 9, 2014 Alternators have an output, but relays just switch connections. I don't know of a 'main relay' although some 620s do have relays. Maybe you can be more specific about which relay. Quote Link to comment
Hern88ndez Posted January 9, 2014 Author Report Share Posted January 9, 2014 Alternators have an output, but relays just switch connections. I don't know of a 'main relay' although some 620s do have relays. Maybe you can be more specific about which relay. Thanks for Correcting me, it's the ignition relay abd inhibitor relay. Well a better question would be how Would I know if they are working? Quote Link to comment
]2eDeYe Posted January 9, 2014 Report Share Posted January 9, 2014 They should click when turned on. You can trouble shoot them with a test light. 1 Quote Link to comment
datzenmike Posted January 9, 2014 Report Share Posted January 9, 2014 It's on the pass side inner fender. May be under a black plastic cover. I can elaborate better when I get home from work and can get my '78 FSM out. The inhibit relay is only on the aromatics isn't it? As Steve said there is or should be a faint click wwhen the key is turned on. This gives power to the ignition coil. 1 Quote Link to comment
KlassicMotion Posted January 9, 2014 Report Share Posted January 9, 2014 Sometimes relays will click and still not work. There are contact points inside the relay just like the points on your distributor. Those points get dirty/burnt and need a good cleaning after awhile. Like Steve said, use the test light or voltmeter to make sure you've got power flowing through the relay. If you don't, it's easy to fix them: http://community.ratsun.net/topic/58498-how-to-repair-your-relays/ 1 Quote Link to comment
Hern88ndez Posted January 9, 2014 Author Report Share Posted January 9, 2014 Will do, found them and found a Manual for the truck, learning as I go Thanks for the knowledge. I will let y'all know still trying to get her back and running. Quote Link to comment
Hern88ndez Posted January 12, 2014 Author Report Share Posted January 12, 2014 So off from work today and found that maybe the relays are not working. Went to peps,AZ,Napa and car quest and they did not have relays(inhibitor and ignition) that I need it. I search eBay and nothing. Where is a good spot that has datsun parts in general? Quote Link to comment
dr.feltersnatch Posted January 12, 2014 Report Share Posted January 12, 2014 Check rockauto.com Quote Link to comment
datzenmike Posted January 12, 2014 Report Share Posted January 12, 2014 You have two other posts on this same problem. http://community.ratsun.net/topic/59325-main-relay/ http://community.ratsun.net/topic/59273-620-issue/ How about sticking with one till it's solved??? Electricity is invisible so a tester of some kind is needed to let you know if power is present or not. For $5 you can get a test lamp that has a probe and the lamp. Now you can just replace a relay but if there is no power to it or if the signal to turn it on is missing it's not going to help much is it? Looking back at this post... http://community.ratsun.net/topic/59273-620-issue/ you say the motor is not turning over. So what relay are you replacing? The starter gets power from the battery and a start signal from the ignition switch. There is no relay involved in this. Get a test lamp and clip one end on a ground source and touch the other to the small Black/Yellow wire on the starter solenoid. Have someone turn the key to START.... does the lamp light up or not? Quote Link to comment
Hern88ndez Posted January 12, 2014 Author Report Share Posted January 12, 2014 King rat I did but I ain't going lie did not know how to bump the post new do y'all can repost. Dr.feltersnach will check in a few Quote Link to comment
datzenmike Posted January 12, 2014 Report Share Posted January 12, 2014 OK I have merged all you topics into this one. This will keep all the symptoms and suggestions together as well as what you've tried. Lets get back to basics... Turn the key to START. Does the starter turn the motor over? Yes or NO. Quote Link to comment
Hern88ndez Posted January 12, 2014 Author Report Share Posted January 12, 2014 Fixed...she alive and kick strong. It was a simple, the problem was loose ignition wire to my Ignition switch. Now to the next post. Thank y'all for y'all thoughts. Will keep in mind for future problems. Quote Link to comment
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