Ez wire harness with efi guy explorer harness

[Bronco gold]

Looking for an answer from anyone who has an ez wire kit and efi guys rewired harness. With the red alt wire coming from the fuse box, it's hot all the time and I need to know am I using this wire at all with the new engine harness .

Also am I not using ez wire harness purple ign start switch since I am using efi guys tan with red wire as my n.s.s. on the s post of the fender starter relay solenoid?

 

[904Bronco]

Looking for an answer from anyone who has an ez wire kit and efi guys rewired harness. With the red alt wire coming from the fuse box, it's hot all the time and I need to know am I using this wire at all with the new engine harness .

Also am I not using ez wire harness purple ign start switch since I am using efi guys tan with red wire as my n.s.s. on the s post of the fender starter relay solenoid?

Since you don't supply a EZ kit part # for reference, going out on a limb here...

Ez Harness Alt wire would probably go to the Batt term on the alt, which is generally hot all the time. For a standard Bronco 40-65 amp factory Alt.
Now if you are running an aftermarket higher output Alt, like a G3 or G4 from an Explorer, I am guessing this wire is not of sufficient size (Gauge) to take the 100+ amps that these Alts can produce. Nor could the 60 amp max factory amp gauge handle it as well.

For EFI guy harness, the red wire from his fuse box would go to the battery, starter relay terminal. Powers all the relays and EFI components.
The EZ purple wire would be terminated and not used at the starter relay S terminal. Shrink tubing on the end to terminate it
EFI guy should have a red wire with a blue strip going to the S terminal, 90* slip on terminal like Ford uses, he just reused it from the donor harness.

In my install notes, there is a Tan/white wire for the Overdrive momentary switch and a Tan/yellow for the Tach signal.

Not seeing a Tan/red wire? Maybe yours is aged or dirty?

I am also assuming you are running a 4R70W?
If not, then his Trans harness probably has minimal wires, but there would be two for the NSS if automatic.

 

[Bronco gold]

904 bronco
The number on the red alt power wire is 58, and it is in the ez wire harness coming from the fuses.
With efi guys engine harness is the alt power being handled thru his harness?

The tan with red stripe is from a 99 explorer with the 4r70w being the n.s.s. , I did take out ez wire purple start wire because of this, which is corrected now.

 

[904Bronco]

904 bronco
The number on the red alt power wire is 58, and it is in the ez wire harness coming from the fuses.
With efi guys engine harness is the alt power being handled thru his harness?

The tan with red stripe is from a 99 explorer with the 4r70w being the n.s.s. , I did take out ez wire purple start wire because of this, which is corrected now.

EFI Guy's harness does not support the Alt, that is handled by the EZ harness.

EFI guy's harness for the 4R70W will have two wires going to the NSS. One will have the signal (12v) from the ignition switch when in the start position. The switch aka: NSS will allow the 12v to go to the starter relay if the switch/trans is in park or neutral.
The 1st harness he did for me the signal wire to the starter relay was a solid red wire, the 3rd one he did was the red/blue wire, which is a factory color...

 

[Bronco gold]

Thanks 904 bronco, it sounds like I am gonna have to rewatch his video again cause I'm definitely missing a piece of info about the charging system of where the explorer alternator plug with the yellow w white stripe has a fuse on it , and the small green w red stripe where they are going to in his harness that ties into the ez wire or(bronco stock wires) and if it's in the cab side or still out in the engine side of the harness.
I should not have taken a break on this re wire job, I thought it would be easy tho cause his video is the same year as my explorer being a 99

 

[904Bronco]

Thanks 904 bronco, it sounds like I am gonna have to rewatch his video again cause I'm definitely missing a piece of info about the charging system of where the explorer alternator plug with the yellow w white stripe has a fuse on it , and the small green w red stripe where they are going to in his harness that ties into the ez wire or(bronco stock wires) and if it's in the cab side or still out in the engine side of the harness.
I should not have taken a break on this re wire job, I thought it would be easy tho cause his video is the same year as my explorer being a 99

So the Explorer Alt, also called a G4, is rated around 140 amps. Way more than that 10g red wire can handle in the EZ harness.

You can get an aftermarket kit from the Vendors (or make one yourself) that uses a 4g cable, from the Battery, through a 150 amp fuse, and then to the Alt Batt terminal.
You are looking for the field wire in the EZ harness, Ford color is Green with a red strip. It has voltage in run only. Power from this excites the Field and causes the Alt to charge. Generally, this wire is found on the passenger side harness.
The yellow/wht stripe wire needs to go back to the battery, although I and others have just connected it to the Batt terminal on the Alt. The more correct way is to run it back to the battery or starter relay. I have not put a fuse on it? And I don't believe that it is that way on any Explorer I have harvested parts from.
On the Batt power wire to the Alt, Black/orange strip there are two fusible links used on the early years and later ones have a fuse in the Engine fuse panel for Alt power.
The white/black stripe stator wire is generally not used on Explorer Alt, but it is on other applications.

Clear as Mud now?

 

[904Bronco]

Here is a picture of the wiring on my 71 with a Centech harness... And EFI Guy's Engine harness.

I have made my own power supply to the Alt by buying the mega fuse and holder from my local NAPA. I have re used the Alt wire from the Explorer, cut crimped and soldered the ends on.

The purple wire in the Centech harness is not used on mine either, so it is terminated with a GM weatherpack end.

Centech uses a green wire as the field wire, another weatherpack connector attaches it to the Alt plug.

The Alt wire (yellow on the Centech harness) is not used, but I have re purposed it to supply power to the headlight relays.

Just added a 2nd picture, stator wire not used and is terminated with marine grade shrink tubing. It will be hidden when I place wire loom on it.

I have relocated the Battery to the Drivers side...

I hope that I am not confusing you with all this?

 

[Bronco gold]

Easy as mudd, I am a plumber but wish I knew more electrical.
I do have the 4gauge off the b+ alt post with a 150 fuse to battery, and if I'm remembering correctly I have a ez wire, white wire labeled excite that is connected to the ford color green w red stripe . I'm gonna have to dig into my firewall cab wires to find where the ez wire 58 red alt power is going from the cab fuses because it does have power thru it, But I just have it loose now because i accidentally had it back feeding my ignition key not allowing me to kill power to shut engine off, that part is corrected now.
The explorer alternator yellow w/ white can u explain what u are doing? Are u just putting it on b+ and over to the fender start relay solenoid on battery side therefore eliminating my ez wire alt power 58 red.
I thought that with the ez wire red alt power 58 connects to this explorer yellow w/white ?

 

[904Bronco]

The Alt Yellow/white is from the internal regulator in Alt. simply, it is sensing the charge in the Batt. By running it back closer to the battery, it gets a better reading on the battery. The Ford Explorer harness (yellow/whit wire) is pretty long, as the Batt is on the Drivers side, while the Alt is on the passenger side.

The more correct way is to run the yellow/white wire back as close to the battery as you can, like hooking it directly to the Batt terminal. Will it work fine by hooking it directly to the Batt terminal on the Alt, or even on the Batt terminal on the starter relay, yes it will.

My thoughts are that the red EZ Alt wire is not going to be used at all. It would be if you had a stock Alt.

On the Centech harness, the yellow Alt wire comes off the Battery terminal on the back of the fuse block. It is protected by a fuseable link.
Does the EZ harness have a fuse for the Alt circuit, if not then it probably has a fusible link like a Centech harness.

Doug

 

[oldiron]

Easy as mudd, I am a plumber but wish I knew more electrical.

I'm a lineman and very early in my apprenticeship an old lineman explained it this way. "wiring aint nuthin but plumbing for electricity"
You're already two steps ahead.;D
Greg

 

[DirtDonk]

Is there an online version of the instructions for your EZ harness Bronco gold? Just wondering if there is something to look at to see what you're dealing with.

Thanks

Paul

 

[Bronco gold]

Oldiron, I suppose some of that is true.
Dirtdonk, I m not sure if there is any online , I've got the pamphlet infront of me, the instructions are very very slim on the ford .
904bronco, thanks for the help, yes I do have a fusible link on the solenoid powerwire , I did open up my engine harness and found that i took the yellow w/white wire to my c115 but did not continue with it out and into the cab for the ez wire harness red alt power hook up.
So now I have a choice of either just putting a ring term on the yellow w/white at the alt plug and hooking it to the b+ post which connects to the start relay and sealing off my ez wire alt power wire. Or connecting it to my cab ez wire alt red power. I just have a hard time understanding why there is 2, power wires on the alt. 1 being the yellow w /white and another at b+.

 

[904Bronco]

Oldiron, I suppose some of that is true.
Dirtdonk, I m not sure if there is any online , I've got the pamphlet infront of me, the instructions are very very slim on the ford .
904bronco, thanks for the help, yes I do have a fusible link on the solenoid powerwire , I did open up my engine harness and found that i took the yellow w/white wire to my c115 but did not continue with it out and into the cab for the ez wire harness red alt power hook up.
So now I have a choice of either just putting a ring term on the yellow w/white at the alt plug and hooking it to the b+ post which connects to the start relay and sealing off my ez wire alt power wire. Or connecting it to my cab ez wire alt red power. I just have a hard time understanding why there is 2, power wires on the alt. 1 being the yellow w /white and another at b+.

Do These:

"So now I have a choice of either just putting a ring term on the yellow w/white at the alt plug and hooking it to the b+ post" Gets the job done!

"sealing off my ez wire alt power wire."

Don't do this:

"Or connecting it to my cab ez wire alt red power"

 

[Bronco gold]

904 bronco, thanks I will seal it off in cab and make my connection out at the alt. Thanks again for the help on this wiring

 

[EFI Guy]

The tan/red is the same circuit as the red/blue, Ford just changed the color of that wire for later years. It goes to the S terminal on the starter solenoid.

If I'm using the 6 panel fusebox and have an open slot I'll wire the yellow/white to a 20 amp fuse in there. It's the preferred method but slapping a ring terminal and connecting it to B+ works too. In either case, I prefer to protect it with a 20 amp fuse just in case something were to short out inside the alternator.

When I do wire the alternator to the fusebox, I bring the green/red into the cab. It can be connected to a warning light or to ignition hot. If you're not running that wire into the cab then it can be connected to the green/red that went to the original voltage regulator.

 

[904Bronco]

Thanks for sharing Garry... I learned something new.