Wiring for 641 starter relay

curtford67

New User
I am new to your forum, but have enjoyed reading past posts as a guest. I have a 1959 Ford 641 WorkMaster with a 6 volt positive ground. My tractor has a 4 post starter relay. Based on past posts on this forum, I am fairly confident that a wire goes from the small S post to the terminal block for the switch and another goes from the the small I post to the push button starter on the transmission as a ground. However, there is third wire that goes to the coil. I am not sure if it connects to the S or the I terminal. Thanks for any advice.
 
Coil would have connected to switched side of terminal block (from factory). However that side of terminal block is also wired to S terminal of solenoid, so coil could get power from this point just as well.
 

Thank you for the info. I had read that the intent of the wire from the relay was to give the coil a bit more voltage during cranking, so that would make sense.
 
(quoted from post at 17:57:33 05/18/20)
Thank you for the info. I had read that the intent of the wire from the relay was to give the coil a bit more voltage during cranking, so that would make sense.
hat requires a different solenoid and was never used on your model tractor.
 

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