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Farmall & IHC Tractors Discussion Board

Re: 434 starting problem update


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Posted by John T on November 19, 2005 at 13:51:22 from (66.244.90.98):

In Reply to: 434 starting problem update posted by AL Sproule on November 19, 2005 at 11:18:25:

Al, I dont know beans about any 434, so go with what Old or ElToro says over me, but heres my generic thoughts which may help or may hurt lol NO WARRANTY EXPRESS OR IMPLIED.

On many key type spring start switches, the terminals are like BAT for the hot voltage input from the ammeter or voltage regulator etc.,,,,,,,,IGN which powers up an ignition coil on gas engines whe the keys in the ON position,,,,,,,maybe an ACC terminal for accessories when key turned backwards,,,,, and often one thats unlabelded or by itself etc is what powers up the starter solenoids lil S activation terminal when the key is in the Start position.

See if the solenoid has a lil S activation terminal??? If so its what requires voltage to engage the solenoid, and if you hot wire jump it from a hot battery cable it will engage. Thennnnnnnnn its gotta be connected to whatever terminal on the switch thats HOT ONLY WHEN IN START POSITION.

Use a test lamp to insure the switch indeed has a hot voltage feed to its BAT input terminal. That would be fed like off an ammeter or the BAT terminal on a Voltage Regulator etc, somethign thats ALWAYS HOT. Then put the lamp on the switches lil terminals to find which one is hot ONLY when in the start position, and wire it to tHe solenoids lil S activation terminal.

NOTE this assumes the solenoid really has a lil activation terminal (usually labeled S) and the solenoid works?????? I say that cuz when you mentioned you jumped it at the solenoid, Im not sure if you jumped voltage to the lil S terminal or you jumped around the solenid to crank the motor??????? Most solenoids are case grounded, meaning their frame or mounting screws require a frame ground IN WHICH CASE IT WONT WORK IF NOT GROUNDED. See if the solenoid is grounded or needs a ground wire etc. CUZ IF NO GROUND SHE WONT WORK REGARDLESS WHAT YOU WIRE TO IT !!!

Thats all I have to say about that

John T


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