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dkirkup said:
I have swapped main harnesses in my 2wd pickup project vehicle and now I don't get any power. Key in acc. and everything is fine ... key in run and everything is dead. I put on a 85' 4x4 cab, stripped it's harness out and put in a 86' 4Runner (full load) harness. Engine is from an 86' (with ECU)

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In that case it could be several things: bendix wire at starter, neutral start switch, dead battery, missing ground. Check the first 2 on my list first!
 

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If everything has no power then what have you connected to the + on the battery? Did you connect the 80 amp white wire? this wire goes to the engine fuse box...
 

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Did you sand down the battery posts, grounds to the engine block, firewall to valve cover etc?

When that is done Check the white wire on the fender(driver side) where there is a 10mm bolt that connects the two together(in a little plastic cover) This wire goes to the Alternater.Trace it and make sure it doesn't touch anything.

Check your 15 amp engine fuse. Replace it.

If you still don't have any power then your ignition switch is surely not sending any contact from accessory to ign. Replace it.
 
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