FabioV8

Hello, I have a 5.2 engine 318 years in 1995 mounted a prototype off-road, I can not understand how I should connect the two wires that give the command to the alternator, put a picture to better understand (are those called "field terminals") I I no longer use the 'original ECU and even the electrical system as standard.
Thank you.
Sorry for my not perfect language.

Coronet 500

Hope this helps: http://www.allpar.com/history/mopar/electrical.html

TVLynn

The mopar alternator requires a separate voltage regulator There should be a wiring diagram on the site posted.. scroll down towards the bottom of the page

440roadrunner

The new style alternators hook up the same as the old ones, IE everything 1970 and after. You can use a 70/ later alternator, and here's a diagram:

These are often INcorrectly called "dual" field but they are really "isolated" field, meaning that both ends of the field coil are isolated from ground

From MyMopar:

I have no idea what changes you made to your wiring. Essentially you need

Switched 12V igniton to either field terminal

The remaining field terminal (green) runs back to the indicated terminal on the regulator

And you need switched 12V igntition to the indicated terminal of the regulator

The regulator MUST HAVE a good ground. Scrape the back of the regulator, the firewall where it mounts, and use star washers. It's not a bad idea to use "antiox" grease available from any electrics supply, and Lowe's and Home Depot.

FabioV8

Thank you very much know where I can find a regulator?

440roadrunner

Not knowing where you are located, I cannot be specific

The regulator in the drawing is basically any Chrysler product car or truck made in 1970 or after. I'm not sure when they stopped using it -- it would be whenever the regulator became integrated into the engine computer sometime ? in the 1990's

If you are in the U.S. ANY parts store should have one in stock.

In fact, with wiring changes -- such as grounding one field terminal, you can use almost ANY external alternator regulator, including Ford

For the early Mopar regulator, which covers up to and through the 1969 models, you would ground either field, and hook the remaining field terminal to the regulator, ground the regulator, and hook the IGN terminal to switched ignition.

Ford hookup. What is not shown is grounding one of the two field connections. Basically, you run

I not used

A direct to battery

S switched igntion

F Field




What I'm trying to get at is that there are several ways around this problem.

FabioV8

Thanks, I live in Italy,
today I found a regulator tractor with two wires, I connected one terminal of the alternator to ground and the other I connected to the regulator
it seems to work...

bremereric

The picture you showed is a Nippon Denso alternator just like the one in mu 89 Shelby Dakota. One of the field wires is ignition on and the other monitors the ignition voltage to regulate the alterntor. There is no external voltage regulator needed on that alternator. Mine is a 120 amp model.

440roadrunner

Sorry, Brem, that isn't true. What he pictured (and I had missed it) is simply an isolated field unit that works exactly like the 70/ later Mopar alternator.

bremereric

I looked in my service manual buddy and one field comes from the ignition switch battery side and the other comes from the smec or computer so you were wrong also. Two wrongs don't make a right. There is no voltage regulator in my truck nor his vehicle.

FabioV8

this is my alternator

440roadrunner

The voltage regulator, my friend, is IN the computer, and it works exactly as I said earlier. It is controlling the field "to ground" exactly as the 70/ later Mopar units did.

bremereric

Same as mine. If you need an electrical diagram that shows how it hooks up let me know and I can scan a picture of it for you.

TVLynn

For those with the computer regulator. You can retro fit the older style without changing the computer if needed..

Alan077

I think you got enough solutions for this and hope you have fix it with the help of these ideas and solution tips. Good luck for it. I am sure you can do it.