Having trouble with my deseil injection pump
 

i got a 95 gmc 1500 6.5 turbo deseil and i can't get the injection pump to pump.I tested it for power and it is not getting any power.I am looking for anybody that might be able to help me get a wiring diagram for it.It is getting deseil to the injector pump but not to the injectors.Any help would be appereciated.The glow plug relay is not working either i tested it for power and the ground.It tested ok for the main power feed and the ignition power and the ground tested good, the Input from the computer tested at 8 volts but still don't power the relay up.I hooked a 12volt power wire to it and it worked.Any ideas on why or what would cause it not to work properly would be appereciated