The S terminal on the regulator (is) the 'stator' terminal on the alternator that goes to the center tap of the three internal windings. There one and the same.
Right On Thanks for explaining Sorry I didn't read your post right the first time Oh, a post said ... "It is a starter interupt switch. Do a search on here and you will see it explained." Is that for an alarm or something? ...This was my real question and I know the answer is look it up, but that does not cut it. Because it is only mentioned in this post. I might not know how to search but do a search it leads you back here. So what is it?:confused:
Yes, the factory did it that way, but not all factory chokes required 12v to function, as Edelbrocks do. That's why you need to make sure you are getting 12v from the S terminal.
Hi, I have a 72 Grabber that I just put a Holley 670cfm with a electric choke. Holley says I need 12 volts. I checks the S terminal and it only shows 7.5 volts at Idle (950rpm). Is this OK? Or should it be 12 volts. Tony
Tony, you need to understand the following; at cold startup and the moment you turn on the key you don't want any voltage to the choke heater because it will start heating to soon before the motor even gets cranked. If there are restarts,that would add to it and make the choke plate begin to open to far to soon defeating the use of the choke application. This is acomplished because the Alternator winding in not putting out any power at that time. As the motor starts and the Alternator begins to output (turning up to speed), you get the 'timely' delayed application of voltage to the choke heater (after the motor starts) causing it to heat more in line with the time it takes the motor to heat up and allow the choke to begin to open. As the battery takes a recharge from the heavey starting drain, the voltage is upward of about 15 volts+/-, then begins to come down as battery charge is restored, this operating range the choke heater sees. Checking at hot idle fools you into thinking there is not a voltage high enough assumimg there are no charging faults because the battery should not be taking very much of a charge at that time so hte stator voltage may be lower. This seems hard for people to understand why the S terminal is used. The above should be enough to see why. There is no other source of this kind of dynamic action on a Maverick system. Now watch for the famous question, on this board, asking me where I got my information from!
