electrical trouble after harness swap

[slk88]

Hello all, I have had this problem after swapping out the original harness with another one bought off a forum member. In fact I have had this same problem on my 88 Mitsubishi Starion with two swapped harnesses. The problem to put it in the simplest way is that I'm receiving a mixed positive voltage signal on 1 of the two injector terminals that should be reading 0 volts. The other injector terminal reads a perfect +12.8 volts as it should be. I am also getting the mixed positive signal reading on various other connector wires that should be giving me a ground signal. Most of these wires are on the relay connector wires for Alarm and AC functions behind the battery. Also I am getting a reading of 0 volts on some of those relay wires that should be getting a +12 volt signal. This problem is driving me nuts I have checked all the ground wires in the car for good contact and fuses including the fusible links.

[slk88]

I want to add that I don't have a ground which hooks up to the coil bracket that contains a small square black box resistor and runs from a white wire/connector into the driver side harness. For some reason the harness that I have is missing the resistor ground and the white wires/connector that feed into it. The root of my problem might be here I am thinking since the mixed voltage signal I am reading on my voltmeter is showing Millivolts which climbs from 20mv all the way to 200mV then .5V and keeps circling back down to 20mV again?

[scott87star]

Really hard to troubleshoot generalizations, if you can go to the FSM electrical manual, http://www.starquestgarage.com, and provide exactly the points you are measuring and exactly the resultant voltages and or resistances are it would be a big help.