1993 k2500 oem 4x4 wiring missing

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docstoy

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What I have is 1993 k2500 8600gvw 5.7k 4l80e 241tc,what's left of original wiring zip tied to trans lines, think I have 3 wire plug for shifter and 4 wire connector for front axle, transfer case switch is 3 wire also don't see relay at firewall, previous owner had run 2 wires to toggle switches under steering column, would like to restore to original, any help appreciated
 

scott2093

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The 93 wiring manual may help with some direction until someone familiar with your setup can chime in.. Looks like the diesel has your transmission...
 
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