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I need a power supply that wont cut out while cranking the engine, i was simply going to tap in to the 'out power on the ignition switch and run a relay to the EMS unit. Car currently doesnt have power, hence the issue with no testing light.
I thought about doing an 'add a fuse' in the fuel pump fuse spot in the fuse box... i just think its kind of a hack job and would rather wire it in the "right way".--- whatever that means......