Straight 6 & V8 Engine Wire harness? "Pink Wires"

[petey-pablo]

Hello guys me again I recently pulled my motor out and I didn't mark my wires So I went to put the Motor back in I was left with one or two extra wires My truck was Origanally a inline 6 now it is a V8 I have tried searching the Site Threads for this over and over and came up empty handed I found no Wiring Diagram for a 6cylinder Engine wire Harness What Is The difference in the The Straight 6 and V8 Wire harnesses? My truck is a 72 Chevy.... My Engine Harness consists of 6 wires...Wire#1.is Tan and goes to my Proportioning valve.Wire#2 is Dark Green and goes to my Temp gauge. Wire#3 is Small Pink my guess would be Dizzy. Wire#4 is Big Pink Don't Know where it should go? Wire#5 is a Short Brown/White Wire & I Don't know where it would go.. and My #6Wire is Purple and Im guessing this one goes to the Starter solenoid... My qestion is with my Pink Wires the smaller one has writing on it that reads Do not cut Resistence Wich would make me think this is for the Dizzy Now I am left with the bigger of the Two Pink wires Does anyone know where it should be hooked up to I had it hooked up to the Juction block well I was wrong it was causeing my truck and accessories to stay on these two wires seem to be tied into eachother Hot when Ignition On? For now I have this wire attached to nothing I started my truck and it fired up fine and turnned off fine. Im just wondering where I went wrong & dont want to leave a wire of that gauge left in the loom unused .....As for the Brown/White wire I don't really think I need it for anything...I hope you guys can help Thanks again in advance .......Pablo

[brak]

Here's a wiring diagram i got from another member. it should answer your question.



On a side note, are you still using the original style distributor, or did you swap to HEI?

Original - wire up exactly like diagram
HEI - you will need to remove the resistance wire (there's a good writeup in the tech section).

[brak]

Here's the whole diagram if you want that too

[petey-pablo]

Originally Posted by brak

Here's a wiring diagram i got from another member. it should answer your question.



On a side note, are you still using the original style distributor, or did you swap to HEI?

Original - wire up exactly like diagram
HEI - you will need to remove the resistance wire (there's a good writeup in the tech section).

Thanks brak
No I am not using the original style distributor I have a MSD with A Blaster Coil..
I have looked at this Wire Diagram already over and over and it does not show the wires on my harness I am talking about, Could be It's from a V8 My truck has the origanal Straight 6 NoN/AC Engine harness it came with.. This V8 Diagram Show 7 wire wich none of them are Pink the two that are tied up on mine. My harness has 6 wires as I stated a bove Thanks...

[68gmsee]

I'll check my 68 GMC. It has the original wiring on it.

When I changed to an HEI dis, all I did was add a 12 guage wire from the firewall connector to the pos side of distributor leaving the original dis wire in place. I left the rest of the wiring intact.

[68gmsee]

Checked my wiring. It's different than yours to some extent. I have 4 wires coming off the top. I don't have the wire for the oil sw and no wire off to the backup lite as the diagram shows.

The bottom half pretty much follows the diagram.

[petey-pablo]

My wires still look nothing like the diagram pictured above I have 6 wires Heres some pictures Hope someone can help..... I have 6wires 5 pins The two Pink wires are tied in to the sam pin... The Smaller Pink wire is the one labled Resistance Do Not Cut So my guess this one would be for the Dizzy, But the biger one I have no Idea where it goes..

[john]

Heres another diagram with a 12ga pink coming from the ign sw. which sounds about right.

[68gmsee]

Here's a possibility.

Since yours is a 72 maybe the thicker pink wire was for the possibility of an HEI distributor. Never know what these engineers projected on these vehicles. The recommended guage for the HEI is 12 guage.

The small pink wire (resistive) is for your points distributor. That wire looks like it's probably 14 guage.

[LockDoc]

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I don't think those wires are pink I think they are faded red. Here is a picture of a switch harness, the top wire is faded red and the bottom wire is pink.

LockDoc

[joemacho]

the brown and white wire is your horn wire and the big red wire goes to your voltage regulator and your alternator.

[Fubar]

I've got a pink wire in mine too, but mine is tied to a white wire also. I was thinking it is the wire going to the starter/coil that is labeled 20w/ or-ppl ?

[Fubar]

sorry I just realized how bad my pics are.It's hard to tell but the wire on the far right is a purple wire, the pink and white one's are to the left of the purple. Also my v.i.n say's my truck came with a v-8 but I pulled a six out of it.

[petey-pablo]

Originally Posted by joemacho

the brown and white wire is your horn wire and the big red wire goes to your voltage regulator and your alternator.

I am talking about the Engine wire harness Not the Horn and Light harness thanks, I will try to take a Better Picture Later today These were taken using a Camera Phone. I will use a real camera today thanks. I am Just wonder ing where these wires go..

[petey-pablo]

Did they make diferent wire harnesses for Straight 6 Motors besides Ac and Non /Ac trucks? So far from what I have seen no one has a simular harness.. These two wires are Ignition Hot Only Not Constant Hot...

[68gmsee]

Originally Posted by petey-pablo

Did they make diferent wire harnesses for Straight 6 Motors besides Ac and Non /Ac trucks? So far from what I have seen no one has a simular harness.. These two wires are Ignition Hot Only Not Constant Hot...

Re: different wiring harness: I have read where they did use different color wires on these trucks. Usually the exception, but it did happen.

Re: two pink wires. You say ignition hot only? Doesn't make sense. If they're tied together and the resistive wire is for the points distributor, then both should have 12 vdc. Maybe someone messed with the wiring in the past??

In my truck, if some future owner were to look at my harness, they may see a blue 12 guage wire for the HEI on the same connector with the resistive wire -It was the only 12 guage wire I had.

[joemacho]

sorry about that petey but i was to refering to the engine harness also cause there are only two wires that are for the engine 1 for the starter, 2 for the coil or the wire for the dizzy distributor the other three wires are for the temp, brake, and the horn...

[petey-pablo]

Originally Posted by joemacho

sorry about that petey but i was to refering to the engine harness also cause there are only two wires that are for the engine 1 for the starter, 2 for the coil or the wire for the dizzy distributor the other three wires are for the temp, brake, and the horn...

It's ok I havn't figuured it out yet Ben out sick since thursday. I am ganna get back to it this week Yup your right the Purple wire does go to the Starter and the other smaller pink wire Is supose to go to the Dizzy But the biger pink I have no Idea where it goes They are both tied in together and Both Ignitoin Hot.. I was thinking of just Removing the smaller of the two pink wires and useing the bigger one to feed my Painless Fuse block under the hood and run a separet wire to the Dizzy..

[Chulisohombre]

If I remember right the thicker one goes to the alternator. The thin pink was the coil wire. You can use the thick one on the coil since its keyed power. If you use it for a junction block power it still goes through the ignition and could heat up the internals on it. Mine kinda melted and I had to replace it. You could use it as a circuit and turn on a breaker with a better battery connection like some have done then have full power to whatever you connect it to. On my 72 I power the coil off the acc spot on the fuse block.
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