is that orange wire soposed to directly to the battery for the ecm power?

 

Yes, it would be one single wire, I think it's orange... Did you find such a wire?

As you have probably noticed, all the ECM's wires are in one harness, and all the rest of the car is an another... there are a few plugs where the 2 of them interconnect, maybe a total of 3 or 4 under the hood... All of the wires that go to things that the ECM touches are in that one harness all separated from everything else. That would include the mixture control solenoid, throttle position sensor, EGR solenoid, AIR solenoids, MAP sensor, baro sensor if you have one, O2 sensor, knock sensor if your car has (had) one, that power wire, the ESC wiring, and maybe a couple of others. THe "car" harness includes the oil pressure, alternator, temp gauge, fan switch if you have one, and starter; the A/C system has its own harness too, with the compressor wires, fan motor wires, etc. There is a separate one for the body: it includes headlights, parking lights, horn, and stuff like that. These are all individual assemblies, each one laid into the car as it goes down the assembly line according to the engine the car will get and other options. The ECM harness arrives as part of the engine, and is assembled to the car after the engine is already in the chassis.

If it's a single orange wire that comes from the ECM harness - not the main engine harness or the A/C harness or the body harness - and heads toward wherever the battery used to be in your car, then it's ECM power.