So in all of my checking and poking and testing I found what was happening was the main relay was clickin off then back on, momentarily killing power to the car. So this made me start to look at the circuit for the main relay. I tested the voltage at the fuse panel, it's battery voltage, I tested the plug at the main relay, I have the same voltage. But after the car is started the power at the relay is no longer charging voltage like I'm getting at the fuse panel, it's about a volt-ish lower.
So my thought was maybe I'm getting a draw down stream of the main relay causing some flux in the voltage and possibly making my relay click off and on. but not sure where to start. And because The ecu pulls power from the main relay I'm wondering if the ecu is having the same flux in power. Because that might lead into the odd part of the whole thing is when the cooling fan turns off it makes the main relay click off then back on but it's enough to kill it at an idle, which make zero sense to me considering they are on two completely different circuits.
I have checked grounds anywhere and everywhere I can. All are solid and show good connections. I have tested the battery voltage at ecu and it's solid battery voltage.
I'm just kind of stumped on what to try. I have spares of most everything, so I can try to swap out stuff if needed.
Any thoughts would be much apreciated.
Also this is on a 94 Lego wagon 5 speed
Thanks
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