89 jeep cherokee inline 6 changed motor used the old wiring harness i am not getting power to anything?

I changed the motor it is an inline 6 same as the one i took out same wire harness i used a tester and got power to the starter and many other componets but nothing works no lights inside or outside turn the key over and nothing i have been tracing wires looking at diagrams in the chilton book i have been stuck whith this problem for over a week now any sugestions or help would be nice thanks
89 jeep cherokee inline 6 changed motor used the old wiring harness i am not getting power to anything?
I think I would start looking at the battery %26amp; leads make sure they are clean and tight if you have nothing at all? Have you also checked your ignition circuit including the ignition fuse this is a fuse that can sneak up on you. Did you earth out your motor to the body. Have you made sure all the wires are soundly connected. I know all these things sound petty but you may be surprised as to what a single item can cause. I hope this may help in some way.

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