TC40D safety module testing

   / TC40D safety module testing #1  

craigsok

New member
Joined
Oct 4, 2025
Messages
1
Tractor
New Holland TC40D
Prob is no power to inj pump solenoid no power. Tested module, 1st resistance test open. Second test powered with bat voltage. Got 50 Ohms which makes me think it's bad. Should there be no resistance or is 50 Ohms satisfactory?

Thanks
Craigsok
 
   / TC40D safety module testing #2  
This is kind of confusing or I'm missing something.

You say NO power "to" the solenoid so I assume you jumped power to the solenoid from the battery.

Where did you apply the power? Where did you measure the resistance?

IF you had no power "to" the solenoid then the problem is why no power to the solenoid.
 
   / TC40D safety module testing #3  
See attached for testing the fuel solenoid. Basically your measuring the plunger length, then applying power and measuring the distance the plunger moves.
 

Attachments

  • Fuel Solenoid Testing.pdf
    7 MB · Views: 8
   / TC40D safety module testing #4  
I'm thinking the OP is not getting any power FROM the safety module to the fuel solenoid. I know there have been a few threads about the safety module going bad.
 
   / TC40D safety module testing #6  
Yes, that dang Safety Module can be a mess.

From the manual that I have for a TC40D it only shows relays, no safety module, but maybe some versions of this tractor have the safety module.
 

Attachments

  • Safety Start System.pdf
    1.7 MB · Views: 7
  • Fuel Solenoid Testing.pdf
    7 MB · Views: 6

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