Question about 1985 Ford Mustang
This is in a dirt track car , where we are using a key switch to simply power everything. The rest is a toggle/push button set up. My question is this...on an old style solenoid/relay, which is what we are currently running, what is the friggin "I" post used for? I know that my push button goes to the "S", and I have my coil powered of off its own toggle, but what is the purpose of the "I" post on the relay?, is this for and older application?, maybe a points ignition?
Normally on the old style starter solenoid/relay you have two large bolts for the battery and starter cables to attach to. There are two other smaller bolts that are used for the starter actuation. The "I" is used to add voltage to the points so the engine will start while the solenoid is in the start position, the other "S" goes to the start button or start side of the ignition switch. Old style ignitions used to drop the voltage to the coil during start and the engine would turn and turn until the key was released and then the engine would catch and start. To cure this they made the solenoids were designed to give temp power to the ignition system when cranking and starting. Hope this helps, RAC
Posted on Apr 13, 2009
The I is ignition usually this runs from the ignition switch to the solonoid which in turn activates the solonoid and kicks it in to power up the starter.
Posted on Apr 13, 2009
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Posted on Jan 02, 2017
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