rvandivort Posted September 16, 2008 Share Posted September 16, 2008 Hi, wondering about the pg 6 admonitions (in the Megasquirt manual- for wiring and sensors) to supply power in both positions. Been looking at the schematics in the Chilton manual. The interlock relay is probably key..but I come from the old school where ignition and starting are the same thing..how else can the thing start? I have a 76Z june model. I am using the MS power supply board going into a V3. I have also found that the color coding on the wires off the former fuel pump relay are not consistant with the manual....blacks are striped white and two blues go into the system---did a continuity check between one of these and the connector under the passenger seat. One was the fuel pump.Yahoo!! The other..forget it.So..What`s the deal here? We have the black/yellow coming off the starter side..and the black/blue off the ignition side going to the resistor. Which ones ...or both go to switched power on the relay board? Thanks Quote Link to comment Share on other sites More sharing options...
Zmanco Posted September 16, 2008 Share Posted September 16, 2008 The point the MS manual is making is that you need to connect to a point where you have battery voltage BOTH when in the crank and run position. Some accessories such as a heater fan do not get power during cranking. I don't know the specifics of the later 280z models, but why not tap off the +12V supplied to the coil? That will be hot for both crank and run. Or you could test the various leads coming off of the ignition switch via trial and error with a DVM. Quote Link to comment Share on other sites More sharing options...
rvandivort Posted September 17, 2008 Author Share Posted September 17, 2008 Exactly! Was wondering why the problem was raised in the first place. I can get the feed off the resistor. Thanks, Roger Quote Link to comment Share on other sites More sharing options...
rvandivort Posted September 21, 2008 Author Share Posted September 21, 2008 I might add that the lead from the starter side of the the ignition switch to the oem brain had Me worried a bit......in the Chilton schematic. So this is irrelevant? HUHH! Quote Link to comment Share on other sites More sharing options...
rvandivort Posted September 21, 2008 Author Share Posted September 21, 2008 I have to say that going to the distribution/relay board is sooo much easier to do. Spend the extra $. Everything is right there. Quote Link to comment Share on other sites More sharing options...
rvandivort Posted September 21, 2008 Author Share Posted September 21, 2008 Buy the cord between the relay board and the MS unit You desire..expensive--or do it Yourself. I bought the thing. Quote Link to comment Share on other sites More sharing options...
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