Well I combined 2 trucks a wrecked 91 w350 and a 91 d250 without a motor, both w?getrags.
Put everything back together and it will not crank at all, has me pretty stumped. Where to start? Many thanks

 

With mine it was a corroded starter relay that is on the drivers inner fender well. I unpluged it, made shure the truck was in neutral and crossed the correct wires and away it went. Replaced the relay and all is good.

 

Clutch safety switch?

 

we've jumped the clutch safety switch and still nothing. we ahve also jumped the starter relay and still nothing. the small wire going to the starter is getting very low voltage, i mean milivolts. any suggestions?

 

When you jump from the red wire to the brown wire in the relay plug it will not crank? Got voltage on the red wire?

 

i put a new starter relay on it and it cranks real hard now. But it acts like its not getting any fuel. Also the w350 was a rollover and has been setting 2 years, but everything looks good for the most part. Thanks again

 

Got voltage at the shutoff solenoid? Have you tried bleeding the injector lines yet?

 

That got it going, it lives again. Thanks alot guys