DK40help please

[ritcheyvs]

I pulled the fuel solenoid. Tested the connection. No voltage with the key on. could it be a fuse or relay?

The stop solenoid has two wires and the ground path is through the engine block. In other words, the stop solenoid won't do anything unless it is grounded to the block. One wire is for the "pull: coil and it should get a 12v pulse for one second when the key is first turned ON. The pull power is switched by a 30-40 amp relay on the firewall. The other wire is the hold coil and it should always see 12v except when the key is in OFF or ACC. These voltages are measured to ground (e.g. the engine block).

If you measured the volttage between the two wires you did it wrong. There would never be voltage between the two wires: during the pulse they are both at 12 v and after the pulse the "pull" wire is open circuit (i.e. disconnected by the relay).

Yes. There are at least three fuses that could prevent the SS from working. I think they are labeled: alternator/engine stop, engine stop solenoid, and (display) Unit.

Did you try to start the engine with the stop solenoid removed? Removing the stop solenoid should allow the engine to start and run if the SS (in any way) is the problem.

 

[chuck172]

the engine wii not start with the ss removed. I checked the fuses, all good, Relay??

 

[ritcheyvs]

If the engine does not start with the SS removed. the SS is not the main problem. If you have a helper, you can visually check SS operation: have your helper turn the switch on while you hold the SS case against the engine (or use a jumper wire to make this ground connection) and observe the SS plunger retract and stay retracted as long as the key is on.

I think you need to check your glow plug voltage next.

Do not use ether under any circumstances.

Did you squirt WD-40 in the key slot?

 

[chuck172]

I switched the two blue relays, now it won't crank. That tells me that 1 relay isn't working. I'm sending my wife to get 2 new relays, I'll change them both. It must be the relay, agree?

 

[ritcheyvs]

I switched the two blue relays, now it won't crank. That tells me that 1 relay isn't working. I'm sending my wife to get 2 new relays, I'll change them both. It must be the relay, agree?

Maybe. If switching the relays killed cranking the (originally) SS relay is suspect, at best.

But with the SS removed, the SS relay should make no difference.

 

[chuck172]

I'll let you know in about an hour. thank you very much for your help

 

[ritcheyvs]

Is it possible you switched the start relay with the glow relay? If the glow relay was bad that would explain failure to start. The stop and start relays should have contacts rated for about 30 amps and the glow relay should have contacts rated about 60 amps. BUT, I think all these relays have the same pin-out making it possible to connect any relay to any connector. The wires to the glow relay should be bigger than the wires to the other two relays.

 

[chuck172]

the two relays are identical, same numbers.

 

[ritcheyvs]

the engine wii not start with the ss removed. I checked the fuses, all good, Relay??

When you say "SS removed", did you mean the SS was physically unbolted and removed from the engine or just disconnected at the electrical connector?

 

[chuck172]

I meant both physically unbolted and the wiring disconnected.
I just replaced both relays. Started right-up. All fixed. Thanks again!