Zed Head Posted September 26, 2020 Share #37 Posted September 26, 2020 1 Link to comment https://www.classiczcars.com/topic/64482-1975-280z-22-will-not-start/?page=4#findComment-606602 Share on other sites More sharing options...
Zed Head Posted September 26, 2020 Share #38 Posted September 26, 2020 https://www.atlanticz.ca/zclub/techtips/wiringdiagrams/75_280z_wiring.pdf 1 Link to comment https://www.classiczcars.com/topic/64482-1975-280z-22-will-not-start/?page=4#findComment-606603 Share on other sites More sharing options...
iscnetwork Posted September 28, 2020 Author Share #39 Posted September 28, 2020 Update... Took out ignition switch, continuity between battery connection and everything BUT resistor work. (So I now know why the MSD. This wire is disconnected when a MSD is installed.) So I have new switch ordered. I still have no juice to the solenoid (yellow wire). Where is the Interlock Relay located? and what does it look like? [Guessing that its connections are dirty or relay is bad.] Thanks to everyone. Link to comment https://www.classiczcars.com/topic/64482-1975-280z-22-will-not-start/?page=4#findComment-606700 Share on other sites More sharing options...
SteveJ Posted September 28, 2020 Share #40 Posted September 28, 2020 According to the parts manual, it should be part #13. 1 Link to comment https://www.classiczcars.com/topic/64482-1975-280z-22-will-not-start/?page=4#findComment-606708 Share on other sites More sharing options...
iscnetwork Posted September 28, 2020 Author Share #41 Posted September 28, 2020 Thank you , thank you! Does "Z club" have a "Parts manual" up somewhere? I didn't find on the search. I would love to know what every one of these parts are and do for future diags. That is a whole lot of 'un-tapping' I will not need to do. Link to comment https://www.classiczcars.com/topic/64482-1975-280z-22-will-not-start/?page=4#findComment-606714 Share on other sites More sharing options...
zclocks Posted September 28, 2020 Share #42 Posted September 28, 2020 You can go to the following https://www.carpartsmanual.com/ 1 Link to comment https://www.classiczcars.com/topic/64482-1975-280z-22-will-not-start/?page=4#findComment-606715 Share on other sites More sharing options...
zclocks Posted September 28, 2020 Share #43 Posted September 28, 2020 Sorry to digress, Ing module for 75 280 . Also be careful with the carparts manul as it covers several years. 75 has only one fuse link box and the manual shows two. I have a 75 and it 's different than the 76 in many ways. Do you still need a photo of coil and resistor wiring? 1 Link to comment https://www.classiczcars.com/topic/64482-1975-280z-22-will-not-start/?page=4#findComment-606720 Share on other sites More sharing options...
Zed Head Posted September 28, 2020 Share #44 Posted September 28, 2020 2 hours ago, iscnetwork said: Update... Took out ignition switch, continuity between battery connection and everything BUT resistor work. (So I now know why the MSD. This wire is disconnected when a MSD is installed.) So I have new switch ordered. I still have no juice to the solenoid (yellow wire). You should still have power to the coil with the key on, through the ignition module. The ignition nodules are known to get wet. Seems like you're making progress. 1 Link to comment https://www.classiczcars.com/topic/64482-1975-280z-22-will-not-start/?page=4#findComment-606721 Share on other sites More sharing options...
iscnetwork Posted September 28, 2020 Author Share #45 Posted September 28, 2020 Yes I am making progress with my Z. Thanks so much for the "car manual's link" I am guessing I have whole lot of reading ahead. Thanks for the warning about 75 & 76. I notice the dual fuseable link boxes next to each other right off the bat since I was inside of my box to make sure the links were good. I found a mistake on the wiring diagram here (at least on my car in the areas that look 'factory') The red/white wire going to the resistor is black/white same as the trunk line. If you can get me a picture of your '75's coil / resistor area that would be great! I greatly appreciate everyone's helps. [I would have never expected to park a car and it all goes haywire.] Link to comment https://www.classiczcars.com/topic/64482-1975-280z-22-will-not-start/?page=4#findComment-606733 Share on other sites More sharing options...
zclocks Posted September 28, 2020 Share #46 Posted September 28, 2020 Here's a couple of pix of the coil/res. Let me know if you need more 1 Link to comment https://www.classiczcars.com/topic/64482-1975-280z-22-will-not-start/?page=4#findComment-606740 Share on other sites More sharing options...
Zed Head Posted September 28, 2020 Share #47 Posted September 28, 2020 I wouldn't focus on the resistor yet. You haven't found the main wires from the harness that supply the resistor with power. And the wire that supplies the yellow start wire. I'd go back to the ignition switch and follow the wires through the connectors. You're looking at the wrong end of the circuit, I think. 1 Link to comment https://www.classiczcars.com/topic/64482-1975-280z-22-will-not-start/?page=4#findComment-606747 Share on other sites More sharing options...
iscnetwork Posted September 29, 2020 Author Share #48 Posted September 29, 2020 I'm working on 2 things at once as I find parts bad and waiting on new ones. I am removing the MSD & getting power to the solenoid. Thanks for the pictures of the coil & resistor. My wiring there was butchered for the MSD. IF you are looking down at the resistor are the 2 right wires the ones connected to the coil? Link to comment https://www.classiczcars.com/topic/64482-1975-280z-22-will-not-start/?page=4#findComment-606781 Share on other sites More sharing options...
dspillman
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