Hi, I found this at MOD, not sure if that is what you need? Don't know if you can read it, I enlarged as much as I could and still get it in the picture.
January, 27, 2010 AT 4:50 PM
Yeah, its not big enough and I tried to save the diagram.
The purple wire should be the right one. Just trying to jumper it to get it running temporarily.
Because: I have replaced the ignition switch, the neutral safety switch, fuel pump relay, fuses, distributor cap and rotor. And STILL no spark.
Tried jumping from the battery to the purple solenoid wire that runs to the neutral safety switch, but nothing.
Tried jumping from the battery to the yellow ignition switch wire that runs to the neutral safety switch, but nothing.
Voltmeter testing was strange: Getting 35 to 40V when turning the key and testing the purple wire underneath the truck straight from the solenoid/starter!
But no volts until you turn the key.
HOW CAN THERE BE THAT KIND OF VOLTAGE?
January, 27, 2010 AT 6:40 PM
That voltage reading isn't correct. Gasoline engine, 12 volt system? Did you have the meter on the voltage setting? The purple wire has no voltage until the key is in the start position. Battery has a full charge and connections are good? Some of the name brand auto stores will check the starter. You have to take it off and take it to them.