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How I used a 12 volt relay to supply a full 12 volts to the starter solenoid.

New Holland TC29D will not start
New Holland Tractors
Replies 7 Post by nhuser

Thanks for all the help to get this issue resolved. Much appreciated. The diagram I posted shows how I finally wired in the 12DC 40A automotive relay. All the safety switches are still in the circuit, didn't want to by-pass any. The relay supplies a good +12VDC to the solenoid. Now instead of clicking several times to start the tractor it starts up first time everytime. I also added an in line fuse holder with a 5 amp fuse from the +12VDC terminal shown in the diagram to the normally open contacts on the relay for safety.

TC33 won t start -- sometimes
New Holland Tractors
Replies 33 Post by nhuser