I have a 360 motor in a OT car. I would like to replace the mopar remote solenoid with a Ford style unit. I am using a universal wiring loom and aftermarket distributor and matching coil. The Ford unit has two large posts. Battery/fuseable link to loom in, and power out to starter. It also has two small posts marked I and S. I supplies power to the coil at full 12 volts. The S is for the neutral safety switch. My question is where to hook up the smaller wire coming off the starter? Thanks for taking the time to help me.

You connect the 2 starter terminals together, the large "batt" lug & the small "solenoid" terminal with the 11/32" nut on it. Run the large cable from the furd solenoid down to the starter large batt stud (which is now connected to the nearby sol terminal) & when the large cable is energized at the furd solenoid to start it both terminals on the starter will now be hot & when you let off of the momentary contact switch power in the large cable coming out of the furd solenoid goes dead & power will be cut to both starter terminals. The only reason the large & the small starter cables & their respective terminals ain't connected as is right now is because the large batt cable to the starter is hot all the time in the Mopar system & if they were connected obviously the solenoid would be engaged all the time & furd does it by disconnecting (opening) fire to the large cable main power circuit down to the starter which is exactly what you're doing by using the furd solenoid.

Thank you RapidRobert.

John, so there are 2 types of those type of furd solenoids? & what is the ISO relay? EDIT I think I got it, one is a regular 4 terminal relay & the other is the furd type with the 2 small terminals labeled S and I. I think a momentary contact switch sending fire to the S terminal & you're good (if the metal base is grounded). Not sure what setup you have with the NSS

I am using a older style Ford relay. The motor and starter are 1975 vintage. Sounds like I need to ground the solenoid case. Would I run the smaller solenoid wire to the S terminal along with the ignition wire?

The solenoid with the I and S terminals needs to be grounded. The S terminal gets power from the start switch.

The large terminal opposite the battery side goes to the starter and jumpers across to the starter-mounted solenoid as Robert described above. You cannot run the NSS with this type without including a relay as I described above.

i have some of these in stock,USA MADE old stock...

and these...

I use a Ford type solenoid in my trunk with my trunk mounted battery. I did it because I did not want my main battery cable hot at all times going up to my starter as I ran it under the carpet. And as John said you have to use a relay to use the grounded Mopar Nuetral safety switch to work the Ford solenoid. Ron

Ford never used a Mopar NSS circuit (to be clear.) BUT AMC did. It "looks like" a Ferd solenoid, has the I and S terminal, and an additional "quick connect" bullet terminal which gets grounded through the NSS. I assume these were used in some AMCs with Torqueflites

Those solenoids are expensive and difficult to find.

Frankly, why not just leave the Mopar start relay as it is, then run the square solenoid terminal back to the Ford solenoid?

Last, I see no reason to do things that way, IE use a second solenoid. I see no advantage, and you add a second set of contacts in series, so you have that much more chance of voltage drop problems.

Here's the AMC relay / solenoid. The NSS terminal is the one sticking up vertically

http://www.rockauto.com/catalog/moreinfo.php?pk=929440&cc=1003509

annudder




There IS one other way you could use just a Ferd solenoid with a Mopar NSS, although some might say "hokey." You could mount the Ferd solenoid on an insulator block, and hook the NSS switch to the Ferd mounting flange.