Shawninvancouver Posted April 28, 2024 Author Share #13 Posted April 28, 2024 Ok. So to check points opening and closing in turn the engine at crank with socket and watch points ? Link to comment https://www.classiczcars.com/topic/68934-73-240-no-spark/?page=2#findComment-664609 Share on other sites More sharing options...
DatsunZGuy Posted April 28, 2024 Share #14 Posted April 28, 2024 21 minutes ago, Shawninvancouver said: Ok. So to check points opening and closing in turn the engine at crank with socket and watch points ? Yes. Just turn the ignition enough until you see the point open upon reaching the high point of one of the lobes . While at it, check the point gap too. Link to comment https://www.classiczcars.com/topic/68934-73-240-no-spark/?page=2#findComment-664611 Share on other sites More sharing options...
Shawninvancouver Posted April 29, 2024 Author Share #15 Posted April 29, 2024 Ok. Tried 3 distributors. No spark. Coil is brand new. All dizzy looked ok. What are the two wires coming out from under dizzy group?? Green and black white Is it something to do with that?? Link to comment https://www.classiczcars.com/topic/68934-73-240-no-spark/?page=2#findComment-664621 Share on other sites More sharing options...
Shawninvancouver Posted April 29, 2024 Author Share #16 Posted April 29, 2024 does green white wire need to be attached to ballast? Ok. Tried 3 distributors. No spark. Coil is brand new. All dizzy looked ok. What are the two wires coming out from under dizzy group?? Green and black white Is it something to do with that?? Link to comment https://www.classiczcars.com/topic/68934-73-240-no-spark/?page=2#findComment-664630 Share on other sites More sharing options...
Shawninvancouver Posted April 29, 2024 Author Share #17 Posted April 29, 2024 Here is photo of snipped green white by coil Link to comment https://www.classiczcars.com/topic/68934-73-240-no-spark/?page=2#findComment-664631 Share on other sites More sharing options...
Yarb Posted April 29, 2024 Share #18 Posted April 29, 2024 When is the last time the car actually ran. From the pics it looks like it was a very long time ago. Give us some history first please. Thanks 1 Link to comment https://www.classiczcars.com/topic/68934-73-240-no-spark/?page=2#findComment-664635 Share on other sites More sharing options...
Shawninvancouver Posted April 29, 2024 Author Share #19 Posted April 29, 2024 Car ran 10 + years ago. Not sure why it sat. Probably cuz they couldn’t get it to start. Put in a new coil new battety new plugs tried 3 distributors. No spark. I’m assuming the coil is wired wrong. Is it possibly the alternator ? Does bad alternator stop the spark. ?? Link to comment https://www.classiczcars.com/topic/68934-73-240-no-spark/?page=2#findComment-664636 Share on other sites More sharing options...
Patcon Posted April 29, 2024 Share #20 Posted April 29, 2024 Slow down... No the alternator is not needed for short duration running if the battery is fully charged. Don't throw parts at it. That's expensive and the person before you probably tried the same. Some one will post up a diagram of the early ignition system for you to check off of. Do you two disconnected wires go into the dizzy? 1 Link to comment https://www.classiczcars.com/topic/68934-73-240-no-spark/?page=2#findComment-664639 Share on other sites More sharing options...
Captain Obvious Posted April 29, 2024 Share #21 Posted April 29, 2024 Both the G/W and B/W are involved in the ignition. Here's the wiring diagram for the ignition system. This was originally created from the 72 manual, but 73 is the same: 3 Link to comment https://www.classiczcars.com/topic/68934-73-240-no-spark/?page=2#findComment-664644 Share on other sites More sharing options...
Shawninvancouver Posted April 29, 2024 Author Share #22 Posted April 29, 2024 Ok. Great diagram. I have attached A photo with arrow to green white wire that was snipped. Does that look like are in comes from? I will also attach close up of how coil is wired. Please tell me it’s totally wrong. !! Link to comment https://www.classiczcars.com/topic/68934-73-240-no-spark/?page=2#findComment-664648 Share on other sites More sharing options...
Shawninvancouver Posted April 29, 2024 Author Share #23 Posted April 29, 2024 (edited) Ohhh so in most cases the green white just goes to the ballast??? Then just black from ballast to coil?? Or should I do a Y like in the diagram of green white bench off one to coil and one to ballast can someone show me how it looks when it’s actually wired? I looked hard but could not find that. can i do it like this??? Edited April 29, 2024 by Shawninvancouver Link to comment https://www.classiczcars.com/topic/68934-73-240-no-spark/?page=2#findComment-664650 Share on other sites More sharing options...
Captain Obvious Posted April 29, 2024 Share #24 Posted April 29, 2024 Honestly, with all the hacked up wiring and splices and stuff, I can't tell if yours is even close to correct or not. But my assumption (based on the fact that it won't spark coupled with the cut up wires and splices, etc) is that your ignition wiring is not correct. Can you strip the G/W and B/W mystery wires back a half inch and check voltages to body ground? Negative of meter on body ground and positive on B/W. With key off, on, and start. And then do the same thing for G/W. Off, on, and start. What happens? 1 Link to comment https://www.classiczcars.com/topic/68934-73-240-no-spark/?page=2#findComment-664652 Share on other sites More sharing options...
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