Moparts

Adapting a Mopar starter to a Ford starter solenoid?

Posted By: Badge

Adapting a Mopar starter to a Ford starter solenoid? - 07/21/13 07:55 PM

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.
Posted By: RapidRobert

Re: Adapting a Mopar starter to a Ford starter solenoid? - 07/21/13 08:26 PM

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.
Posted By: Badge

Re: Adapting a Mopar starter to a Ford starter solenoid? - 07/21/13 09:29 PM

Thank you RapidRobert.
Posted By: John_Kunkel

Re: Adapting a Mopar starter to a Ford starter solenoid? - 07/21/13 09:57 PM

Quote:

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.



The S terminal is Start power from the starter switch, the solenoid must be grounded to complete the start circuit; the I and S unit can't be used with a NSS unless there is an ISO relay in the circuit. (see diagram below)

To use a NSS with that type of solenoid you need the unit that has two unlabeled small terminals, one terminal is power from the starter switch and the other is grounded through the NSS (you'll lose the ignition boost)....the solenoid doesn't need to be grounded.

Attached picture 7784751-ISOStarter.jpg
Posted By: RapidRobert

Re: Adapting a Mopar starter to a Ford starter solenoid? - 07/21/13 10:11 PM

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
Posted By: Badge

Re: Adapting a Mopar starter to a Ford starter solenoid? - 07/22/13 05:22 PM

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?
Posted By: John_Kunkel

Re: Adapting a Mopar starter to a Ford starter solenoid? - 07/22/13 08:52 PM

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.

Attached picture 7786018-ISORelay.jpg
Posted By: Joesixpack

Re: Adapting a Mopar starter to a Ford starter solenoid? - 07/22/13 09:51 PM

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

Attached picture 7786094-$T2eC16RHJGIE9nnWqySlBRZWDDpRO!~~60_57.JPG
Posted By: Joesixpack

Re: Adapting a Mopar starter to a Ford starter solenoid? - 07/22/13 09:53 PM

and these...

Attached picture 7786098-sw3001.JPG
Posted By: 383man

Re: Adapting a Mopar starter to a Ford starter solenoid? - 07/23/13 02:16 AM

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

Posted By: RapidRobert

Re: Adapting a Mopar starter to a Ford starter solenoid? - 07/23/13 02:38 AM

Quote:

I am using a older style Ford relay. The motor and starter are 1975 vintage. Sounds like I need to ground the solenoid case.

Up front connect the two starter terminals together. Run a momentary contact switch wire to the S terminal on the furd solenoid to crank it. Ground the furd solenoid case. You may or may not connect the I terminal on the furd solenoid directly to the coil positive primary for full 12V when cranking to bypass the ballast.
Posted By: Yancy Derringer

Re: Adapting a Mopar starter to a Ford starter solenoid? - 07/23/13 06:42 AM

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.

Posted By: Magnum

Re: Adapting a Mopar starter to a Ford starter solenoid? - 07/25/13 05:22 AM

Quote:

,
Last, I see no reason to do things that way,





Go back 2 replies and read 383man explanation.

In a battery in trunk set up. It leaves the hot wire dead. Excellent set up!
Posted By: RobX4406

Re: Adapting a Mopar starter to a Ford starter solenoid? - 07/25/13 06:54 AM

Quote:

Quote:

,
Last, I see no reason to do things that way,





Go back 2 replies and read 383man explanation.

In a battery in trunk set up. It leaves the hot wire dead. Excellent set up!



Or running the starter load through a cut off which burns them up more quickly.

I do mine like 383 posted, except everything on my cars outside a 2' cube around the battery ends up DEAD when you throw the cut off!

When you have/see a car burn up because of live wires, you'll understand.
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