Ez-Wiring help with ignition hook-up
 

I have the mini-21 EZ-Wiring kit that I am trying to hookup. I did do several searches and found some good pointers. I am having trouble with the ignition switch hook-up. I do have a HEi distributor installed. This is for a 72 with a 350 V8.

In the kit it has the following wires marked and their colors:

• Ign Switch power - Red with black pigtail coming off the side
• Ign Switch start - purple
• Ign Switch coil - pink
• Ign Switch ACC - orange
• Ign Switch IGN - brown

On the back of the switch it has the following post:

• Acc
• Sol
• Ign
• Bat
• G-1
• G-2

Im a little or maybe a lot confused on getting this right. Here is what I think from the schematic:

• Acc gets the orange wire marked "Ign switch ACC"
• Bat gets the red wire marked "ign switch power"
• Ign gets the brown wire marked "Ign switch Ign"
• Not sure on the (purple wire marked "Ign switch start" and the pink wire marked " Ign switch coil" )

If I am good on the first three, where do I put the purple and pink wires ? Also what do I do with the black pigtail coming off of the red power wire?

Re: Ez-Wiring help with ignition hook-up
 

Is this what you have?

http://67-72chevytrucks.com/vboard/p...ictureid=14668
You are correct.
Ign Switch power - Red with black pigtail coming off the side Bat
Ign Switch start - purple =Sol
Ign Switch coil - pink =Ign
Ign Switch ACC - orange =Acc
Ign Switch IGN - brown =Ign

Re: Ez-Wiring help with ignition hook-up
 

This is the type of ignition - stock in the 1972

Re: Ez-Wiring help with ignition hook-up
 

the switch you posted is correct for a 72 the diagram I posted is the generic ezwiring diagram, your connector should look like this.

http://67-72chevytrucks.com/vboard/a...1&d=1271198366

The brown and green wires on the right are the G1 and G2 terminals the brown ignition wire is one on the left.

Re: Ez-Wiring help with ignition hook-up
 

I know this post is old but I am in the process of hooking up my ignition switch with an ez harness. Did you end up splicing the pink and the brown and connecting them to the Ign tab? And what did you do with the black wire which I am assuming is a ground?

Re: Ez-Wiring help with ignition hook-up
 

I recently installed a EZ harness for a customer(he already had the kit)
Personally, I hope I never see another one. The price is according to the quality- very disappointed- the directions are vague at best and the "instruction manual" if you want to call it that, wasn't even correct for the kit.
This was a 12 circuit with the mini fuses.
I know several on here use these and like them, but after using Painless, Ron Francis, and American Autowire i just didn't like it.
That's my 2 cents worth, I am sure the flogging will begin shortly.....

Re: Ez-Wiring help with ignition hook-up
 

So you splice the pink and brown wire together?? Both going to ignition

Re: Ez-Wiring help with ignition hook-up
 

No Pink supplies the ignition coil/hei while brown supplies power to ignition circuits like blower motor/windshield wiper. The pink stays hot while cranking while the brown drops out.

Re: Ez-Wiring help with ignition hook-up
 

So if wiring this up for a '65, where will the brown wire hook up to? I have the pink going to IGN.

Re: Ez-Wiring help with ignition hook-up
 

Or to verify, in the picture, they are hooked up together. Is this correct for the '65?

Re: Ez-Wiring help with ignition hook-up
 

I'm in the process of installing a 12 circuit mini EZ wire harness and don't find it as EZ as the name would suggest :) the comments about the pigtails are very helpfull Fixit-P

Re: Ez-Wiring help with ignition hook-up
 

Ok im having two problems. My dome light only comes on when I'm cranking my truck to start, and the starter sounds like it's trying to engage when Im turning the truck off. I have the ignition switch wired just like the picture, with pink and brown wires tied in together. With the two problems I'm having, I don't think this is correct.

Re: Ez-Wiring help with ignition hook-up
 

Dangit! Dome*

Re: Ez-Wiring help with ignition hook-up
 

I guess you have the dome hooked up the acctuator, so it only gets juice for as long as you hold the key in the starting position.
but now I think about it..perhaps you didn't ground it correctly?

Re: Ez-Wiring help with ignition hook-up
 

dome light is getting power straight from the fuse box. and then i ran the other ground side straight to a ground cable i installed on the frame (i know this is not how its supposed to be wired in the end, but im just trying to get it to light up). it lights up when trying to turn the the truck over, but once the truck is turned over and the truck is running, the light goes off. thats what makes me think i have something wired wrong with the ignition switch.

Re: Ez-Wiring help with ignition hook-up
 

Shouldn't the dome light have a constant power and the ground is through the door actuator? so that when you open your door the dome light comes on?

Re: Ez-Wiring help with ignition hook-up
 

the way ive read for it to be wired is that it has constant power from the fuse box, then the ground goes to the light switch. when you turn the light switch all the way one direction, that turns on the dome light. Like i said earlier, im not going to leave the ground of the dome light permanently wired to the frame for ground, im just trying to figure out why the dome light only wants to come on when cranking the truck.

Re: Ez-Wiring help with ignition hook-up
 

even if the ground were wired the right way, the dome light would only be getting power when the truck is cranking.

Re: Ez-Wiring help with ignition hook-up
 

Then I can only come to one conclusion and that is that it gets the power feed over your ign actuator, which only gets power while cranking over the engine.
as soon as the truck runs and the key is back in the running position the light goes off again right?

Re: Ez-Wiring help with ignition hook-up
 

Yes. That's why I'm thinking I wired something with the ignition switch wrong. That and when I turn the truck off, the starter makes a noise like it's trying to engage again. You know the sound your car makes when it's already running and you try to start it again? That's the sound my truck makes when I go to shut the truck off.

Re: Ez-Wiring help with ignition hook-up
 

this is above my paygrade..I understand the the problem, but what I would do is a try and error technique.
Get 7 feet of wire and run a direct feed from your battery to the dome light, just to try.
see if the mysterious problem with the light and the starter motor still exists.

Re: Ez-Wiring help with ignition hook-up
 

Did that already too. Light comes on with power straight from the battery and the other wire straight to ground.

Re: Ez-Wiring help with ignition hook-up
 

ofcourse it does, (you mean wen you open the door right?) but let one of them go their "original" way. so the battery feed and then leave the ground as you've got it hooked up now.
and the starter motor still did it's thingy with the direct feed to the dome light?

Re: Ez-Wiring help with ignition hook-up
 

With the battery straight to the dome light, and the ground ran to the headlight switch, it works as well.

Re: Ez-Wiring help with ignition hook-up
 

but the startermotor still wants to engage when you turn off the ignition?

Re: Ez-Wiring help with ignition hook-up
 

Yes. Did you combine the pink and brown wires on the ignition switch? How did you wire yours, like the picture?

Re: Ez-Wiring help with ignition hook-up
 

to be honoust, I came to this thread to find how-to's :) I'm still in the process of getting it wired up.

Another thing came to mind last night and that is; what if EZ wiring got it wrong? so your wire diagram and colours don't match?

Re: Ez-Wiring help with ignition hook-up
 

Piggybacking on a thread with this much complication is never a good idea especially when the years are so different. The 72 ignition is way different than the 65 and the wiring can be too.
Take a look at this thread and see if it helps........ http://67-72chevytrucks.com/vboard/s...d.php?t=427476, and get the dome light hooking to the key switch idea out of your head. The dome light does not connect to the key switch on any models that I am aware of. You need to figure out if the wiring harness you have is for a 1965 or a 1972 and go from there. Also does your truck have gauges or idiot lights?

Like I said above, You should start your own thread because the number of problems contained in the original thread plus Concretekillers problems and being a different year just confuse the issue.

Would you guys please make a signature and give some details on your trucks. It really makes it a lot easier to answer questions and solve problems.

Re: Ez-Wiring help with ignition hook-up
 

fair enough, I have my own thread going: i suck at reading wiring diagrams

Re: Ez-Wiring help with ignition hook-up
 

I'll figure it out on my own, but seeing as how this thread was about wiring the ignition switch with an EZ Wiribg harness, that's why I started asking questions here. I could care less about the dome light, however, seeing as how my starter tries to engage while turning the truck OFF, that makes me think that I wired my ignition switch wrong. The dome light was something else I had notice along with the starter problem.

Re: Ez-Wiring help with ignition hook-up
 

I saw it and I will be replying in it soon.

When you ask questions about wiring an ignition switch you need to ask about how to do it on the year of your truck not on a 1972. That's why I referred you to the thread for your year. If you have the switch for a 1972 then it's going to be different and the harness must match the switch.

You nay not care about the dome light but it may very well be why your starter is cranking when you turn off the key. I'd be more than happy to help you straighten out your wiring but I'm not going to post in a thread that has this many issues

Re: Ez-Wiring help with ignition hook-up
 

I know this is an old thread, but like me I know several people still search for answers to EZ wire harness issues.

Ive used EZ wire harnesses several times down thru the years and I don't remember having the issues with them that Ive had this time. I have read this thread and others and since wiring is something foreign to most of us, the threads always seem to wander as we all search for the answers to our own particular issues.

I just want to address One issue------The wiring of the 67-72 chevy truck ignition switch.
My harness kit (as well as most other general purpose harnesses) come with the Ignition switch wired in two connectors to connect into the steering column. When you use the older dash mounted switch, you have to make some changes.

Today, (since Ive been having the same doubts as many others) I contacted Tech support at EZ-Wire about the ign. switch issue.

The EZ wire harness has the following wires for the ignition switch and they are marked as Im listing:
1. RED -------------------- Ign switch pwr--------connect to Batt term.
2. Black pigtail------------ Ign switch pwr--------CUT Off-Tape exposed end
3 Orange------------------Ign switch Acc.--------connect to ACC. term
4 Purple-------------------Ign switch Start-------connect to Start term.
5 Pink---------------------Ign switch Coil --------connect to IGN term
6 Brown-------------------Ign switch Ign --------connect to IGN term

There is a picture of this on page 13 of the ez wire manual (although it doesn't include wire colors)

Also, ez wire doesn't supply the green wires and the brown wires that go to the G 1 and G2 terms (if used) .


As I said, this comes from the factory tech.--He tried to tell me a couple times that the proper wiring was shown in the diagram on page 13 of the manual. I explained to him that I didn't have a page 13 in the manual. He suggested that I might have a "knock off" harness but luckily I still have the shipping box (since I ordered this harness almost two years ago) with the factory return address on it. Since Ive used their harnesses before I still had an old manual and he told me that ALL manuals are the same--have been for 20 years.
The guy I talked to was helpful and offered any further explanitions I might need. If you are having issues with THEIR harness I would call their number. Ive read several threads here and other places and even though we are all interested in helping each other, there is still doubt and some confusion in some of the threads. One thing I have noticed is that the One issue that always comes up is Ign switch wiring (which is probably the most critical area ).

As I said----My comments Only apply to the EZ Wire harnesses

Re: Ez-Wiring help with ignition hook-up
 

The EZ wire harness has the following wires for the ignition switch and they are marked as Im listing:
1. RED -------------------- Ign switch pwr--------connect to Batt term.
2. Black pigtail------------ Ign switch pwr--------CUT Off-Tape exposed end
3 Orange------------------Ign switch Acc.--------connect to ACC. term
4 Purple-------------------Ign switch Start-------connect to Start term.
5 Pink---------------------Ign switch Coil --------connect to IGN term
6 Brown-------------------Ign switch Ign --------connect to IGN term

There is a picture of this on page 13 of the ez wire manual (although it doesn't include wire colors)

Also, ez wire doesn't supply the green wires and the brown wires that go to the G 1 and G2 terms (if used) .

Thank you for posting this helpful information. I suppose I may have ruffled some feathers in the original thread. It's been so long ago that I don't even remember if we solved their problems.

I would like to point out a few things that will be helpful and even necessary for the harness to work correctly on the 67 to 72 trucks.

The EZ wire harness has the following wires for the ignition switch and they are marked as Im listing:
1. RED -------------------- Ign switch pwr--------connect to Batt term.
This is correct.

2. Black pigtail------------ Ign switch pwr--------CUT Off-Tape exposed end
The stock harness does not show this wire although it could be used as a power take off for any full time hot source. Tape it off if not used as suggested.

3 Orange------------------Ign switch Acc.--------connect to ACC. term....
This is a 12 gauge brown wire on the stock harness, and it runs to the fuse panel and powers the heater and wiper circuit, as well as the turn signal flasher, and hazard flasher for the steering column. It should have a 20 gauge resistance wire connected with it which is the exciter wire for the alternator.
I'm not sure how the EZ harness accomplishes this task.
See the wiring diagram below.

4 Purple-------------------Ign switch Start-------connect to Start term.
Same as stock.

5 Pink---------------------Ign switch Coil --------connect to IGN term....
This wire is a feed wire for the coil, the fuse panel and indirectly ( off the fuse panel for the dash cluster. It comes off the key switch and supplies key on power to those items. Check the diagram. Follow the pink wire from the key switch and it's easy to see.

6 Brown-------------------Ign switch Ign --------connect to IGN term...
This is probably the exciter wire or it might be the ACC power wire in the case of the pre 68 trucks whose key switches do not have ACC terminals. if it's the exciter wire it will be smaller and the stock wire has a white stripe in the insulation. Again see the diagram below.


Also, ez wire doesn't supply the green wires and the brown wires that go to the G 1 and G2 terms (if used) .

These two terminals were used as grounding points for the temperature warning lights in the idiot light dashes without the gauges. When the key is turned to the starter terminal these two points ground the brown and green wires that were connected there. The green wire was the temperature light wire and the brown is the brake light wire. After they installed the gauge dashes the temperature light was eliminated so they no longer needed the green wire or the terminal on the key although it may still be there.\
The brown warning light wire is still used and the wire should still go to the key switch.
These two terminals are completely independent of the starter purple wire terminal, obviously since they connect to ground through the key switch, internally. This feature is illustrated in the threads about going from a light dash to gauge dash.

Now for the diagrams.

The key switch is at the top, notice the arrows for the ACC and exciter wires.
The exciter wire is just below the brown ACC wire and it is 24 gauge.

Attachment 1493007


This one shows the key switch hookup and the green and brown wires and their terminals. There is a real time picture posted in the thread by Fix-it P of the key switch wiring and they are shown in it as well.




Attachment 1493001

This is the main harness showing the pink wire off the ign terminal and how it splits in the harness and feeds the fuse and ignition circuit.


Attachment 1493008

Re: Ez-Wiring help with ignition hook-up
 

VetteVet,

Really good post. I think youre post added a lot to mine. For those of us using EZ Wire harnesses, this ought to definitely answer the question, "How do I wire my ignition switch". I really like the full color diagrams too.

As I mentioned, Ive used Ez a few times before without difficulty. Im thinking it may just be the application(?) this time although in my past experience, the cars were all older (which may mean simpler ?)

Re: Ez-Wiring help with ignition hook-up
 

I know this is a way old thread, but it kept coming up every time I searched for help and a solid cut and dry answer. So now that I have sorted it out i figured I would add to it for others trying to solve there dead side of the fuse box issues. Let me also tell you that if you swap the orange ign acc for the brown ign you will have undesired circuits running in acc mode (ie..fuel pump). The black pigtail is not needed but the 67-72 has an extra tab so why not leave it instead of cutting your new harness. Also the terminals in the ez plugs can be unpinned and re installed into the stock pigtail. (You can buy the pigtail at napa). The terminals are gm 56 series and you can get them auto parts stores. Orylies has the only ones i found for 12 ga wire. If you get these you can put the brown ign and pink coil together and solder the terminal for a factory fit pigtail. No need to cut any others. Also you can use the 67-72 switch in a 61-66 dash with using the original chrome retaning nut for the desired year. This will give you acc position. Use the 67-72 lock cylinder. You may need a flat washer on back side to get a snug fit. Here is a self explanatory pic. Cant get easier than this!