76 k100 won't shut off

ok is there a specific cummins nt small cam shutoff solenoid type and brand I should be looking to buy? I see there are a few types 12v 24v etc

 

Do you have a series/parallel switch?

 

I would think it would be a 12v. Soleniod..
In cause your not familiar with how it should work it takes power to activate the plunger to open to let fuel flow into the pump when you shut the Ignation key off that shuts power off at the soleniod shutting the plunger which in turn stops fuel flow to the pump shutting the engine down
The reason @Oxbow asked of you have a parallel switch is because of the vintage of your truck at that time Pacar and some other manufacturers were using a 24/12 volt system which meant the starting circuit was on 24v but most everything else on the truck was on 12v.. chances are at this point in life it has been updated to just a 12v system.. reguardless I think that fuel solenoid was always 12v ..

 

Just to add to what @Oxbow is asking, your battery box look anything like this? This is my 83 K100C….

 

nt 855 small cam

 

it is a 12/24v system and it does have a new Texas industrial 12v24v relay the starter is 24v but elec system is 12v

 

yes series parallel switch

 

no my batt box is inside the stretch

 

so do I have to go cummins or any aftermarket 12v nt 855 shutoff switch will work

 

I try to distance myself from Cummins enough that I can't steer you in any certain direction
I would surely think you could find a after market soleniod some where .. I would try my local NAPA 1st
@OLDSKOOLERnWV is a wealth of Knowledge on Cummins and where to get the best parts