jacob80 Posted July 14, 2010 Share Posted July 14, 2010 (edited) Hey guys, Drew this wiring diagram up in Omnigraffle, took me about two days! Really like the program. I know its small, but its the first time I've drawn one on the computer, so give me some slack! First Draft: Second Draft: Let me know if this looks good. If you see anything questionable just holler. Hopefully I can get some responses by tomorrow afternoon as I would like to start wiring it up. Thanks guys! Edited July 16, 2010 by jacob80 Quote Link to comment Share on other sites More sharing options...
Noddle Posted July 14, 2010 Share Posted July 14, 2010 (edited) Silly question, you have your coil hooked up to the fuel + on the pump, doesn't MS prime the pump and turn it off until the engine fires ? just had another look, MS earths the pump (relay) to fire it up.. my Bad. Nigel Edited July 14, 2010 by Noddle Quote Link to comment Share on other sites More sharing options...
jacob80 Posted July 14, 2010 Author Share Posted July 14, 2010 (edited) Here's the diagram I'm going by Yes, you're right, but IIRC, the fuel pump relay supplies 12v while to fire the coil, it must be grounded through megasquirt (I think?). Edited July 14, 2010 by jacob80 Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted July 14, 2010 Share Posted July 14, 2010 Nicely done. If the MS is controlling the coil, it will wait for a pulse from the distributor, but it can read that whether the coil has power or not. Quote Link to comment Share on other sites More sharing options...
jacob80 Posted July 14, 2010 Author Share Posted July 14, 2010 Nicely done. If the MS is controlling the coil, it will wait for a pulse from the distributor, but it can read that whether the coil has power or not. So you approve of my wiring, Matt? Ahh, what a relief! Quote Link to comment Share on other sites More sharing options...
FlatBlack Posted July 14, 2010 Share Posted July 14, 2010 The connectors are a very very good idea. I wish I would have used more. I know a certain extremely tall S30 owner who didn't put any in and has to balance his intake on top of his valve cover to change turbos What kind are you using? Quote Link to comment Share on other sites More sharing options...
jacob80 Posted July 14, 2010 Author Share Posted July 14, 2010 (edited) What kind of connectors? They are GM weatherpack connectors, very handy indeed! Does the wiring look good, or are there things I need to change?? Edited July 14, 2010 by jacob80 Quote Link to comment Share on other sites More sharing options...
FlatBlack Posted July 14, 2010 Share Posted July 14, 2010 I think if Mr. Cramer approves [see: "Nicely done."] then you are good to go. Quote Link to comment Share on other sites More sharing options...
jacob80 Posted July 14, 2010 Author Share Posted July 14, 2010 (edited) Yes, I believe I'm very safe when he confirms this! BUT, I want to point a couple things out. Disregard my fan relay not being hooked up for now, I'm still in the process of figuring out how to have megasquirt turn it on and off. Secondly, I forgot to draw the line to the starter from the relay. I have actually tested this relay and it works but I still have the same problem of a "click" that will randomly happen and it won't turn over. After I quickly turned the key from "on" to "start" multiple times, it'll eventually crank. I have ZERO idea what is going on there. I've replaced the starter and had the starter I have now tested with no success At any rate... Could you look over the diagram closely for me? I just don't want to have to do this whole process again Thanks guys! Edited July 14, 2010 by jacob80 Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted July 15, 2010 Share Posted July 15, 2010 I haven't checked every wire, but overall it looks right. I would put the resistor inside the MS instead of in the external wiring but this is a matter of personal preference. One thing that doesn't look right - it seems like you have the fan relay on full time? It looks like it's wired to constant power (should be switched if MS is controlling it) and a permanent ground. Quote Link to comment Share on other sites More sharing options...
jacob80 Posted July 15, 2010 Author Share Posted July 15, 2010 Matt, I guess I'm unaware as to how and where to install the resistor inside themegasquirt box, if you could tell me where/how to do that I would appreciate it. As far as the fan relay, perhaps I drew it wrong. I have a constant going to one of.the poles which will be switched on by a megasquirt output. Thanks! Quote Link to comment Share on other sites More sharing options...
junglist Posted July 15, 2010 Share Posted July 15, 2010 Nice diagram. I'm gonna have to combine yours and the ones for running an MSD 6AL for wiring my MS. Quote Link to comment Share on other sites More sharing options...
jacob80 Posted July 15, 2010 Author Share Posted July 15, 2010 Thanks man! I'm still working with the diagram to clean things up visually. I also plan to incorporate an MSD box in my setup. Now that I think about it, I wonder how hard it would be to add it to megasquirt. Hmmm... Quote Link to comment Share on other sites More sharing options...
jacob80 Posted July 15, 2010 Author Share Posted July 15, 2010 (edited) I would put the resistor inside the MS instead of in the external wiring but this is a matter of personal preference. Matt, I would MUCH rather do this. My question is, is THIS the resistor that you're talking about? The one that jumpers the IGBT? Or is this required as well as the resistor on the dizzy signal wire? I have a resistor as pictured above wired as well as the resistor on the dizzy signal wire on the PCB 3.0 board. Thanks! Edited July 15, 2010 by jacob80 Quote Link to comment Share on other sites More sharing options...
jacob80 Posted July 16, 2010 Author Share Posted July 16, 2010 Updated my original post with a second draft. I'm now working on drawing in a starter and once I figure out how to wire the fan, that will be drawn in as well. Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted July 19, 2010 Share Posted July 19, 2010 The distributor signal wire. To put this in a V3.0, run a 1K resistor from S12 to TachSelect. Quote Link to comment Share on other sites More sharing options...
jacob80 Posted July 19, 2010 Author Share Posted July 19, 2010 The distributor signal wire. To put this in a V3.0, run a 1K resistor from S12 to TachSelect. Simple enough, thanks Matt! Quote Link to comment Share on other sites More sharing options...
Kali Posted May 11, 2011 Share Posted May 11, 2011 So going through the pages and i come across the diagram cleanest one yet, props Quote Link to comment Share on other sites More sharing options...
jacob80 Posted May 12, 2011 Author Share Posted May 12, 2011 So going through the pages and i come across the diagram cleanest one yet, props Thank you sir. I'm actually in the process of rewiring the entire works. I'm going with a "minimalistic" engine bay. I plan on welding shut some holes in the engine bay walls, hiding the body wiring harness, and some other small tidbits all while improving on this current wiring diagram. Quote Link to comment Share on other sites More sharing options...
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