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Username Post: HEI Wire Harness        (Topic#360274)
paulo57509 
Senior Member
Posts: 424

Loc: Tracy, CA
Reg: 07-18-00
03-25-20 12:47 PM - Post#2789454    

I have a friend that's looking for the distributor side of the harness circled below.



The capacitor harness (coil/12v) is available most every where. But the 4-wire harness with the Weather Pack connector is MIA.

Anyone know where this harness is available?

I'm thinking cut and splice or wrecking yard is the only remaining solution.

TIA

1987 IROC-Z 5.0L
1992 Lumina Euro 3.1L
2003 GMC Safari


 


IgnitionMan 
Valued Contributor
Posts: 3717

Reg: 04-15-05
03-25-20 01:40 PM - Post#2789457    
    In response to paulo57509

ANY good aftermarket EFI manufacturer that services those particular 7 pin EFI HEI modules should have an adapter harness from module to EFI computer.

Although you only need the end connector for the module, one of those harnesses would give you the connector and wires you could cut and splice.

Ask Holley.



 
65_Impala 
Very Senior Member
Posts: 4440

Reg: 12-29-02
03-25-20 05:54 PM - Post#2789465    
    In response to paulo57509

Do you shop Ebay?

https://www.ebay.com/itm/Small-Cap-HEI-Dis tributor...

https://www.ebay.com/itm/Distributor-Ignit ion-Conn...

https://www.ebay.com/itm/Small-Cap-Distrib utor-Con...






 
IgnitionMan 
Valued Contributor
Posts: 3717

Reg: 04-15-05
03-25-20 06:28 PM - Post#2789467    
    In response to IgnitionMan

Nice try, but, NO CIGAR, those 3 listed are for 8 PIN Small cap GM EFI HEI, with the connector terminal passing through the cap, along with a two terminal connector for the coil.

The one the OP needs, from the diagram posted above, is for the 7 PIN GM EFI/EST HEI module, completely contained inside the large coil in cap EFI/EST HEI distributor.

If some would have looked closer, the module only has 3 wires, A, B, C going to the EFI, or EST controller computer, with the connection D being a pass through GROUND, not directly connected to the module, as there is no direct connect terminal for it.

Some few 1981 thru early 1985 EST (Electronic Spark Timing) carbureted setups used that same module to implement a stand alone knock retard sensor and stand alone knock controller box as well.

I would have posted a picture of the 8 pin module, but it says I have to pay to do so. So, go to rockauto.com, look up an EFI HEI for a 1986 GMC Safari V6, and it should have a picture of the module those 3 listed 8 pin module connectors fit.



 
paulo57509 
Senior Member
Posts: 424

Loc: Tracy, CA
Reg: 07-18-00
03-26-20 11:00 AM - Post#2789505    
    In response to IgnitionMan

Thanks, IgnitionMan.

I figured the cut and splice method was the easiest solution. I'll forward this information on.

Thanks again.

1987 IROC-Z 5.0L
1992 Lumina Euro 3.1L
2003 GMC Safari


 
IgnitionMan 
Valued Contributor
Posts: 3717

Reg: 04-15-05
03-26-20 04:38 PM - Post#2789524    
    In response to paulo57509

paolo, our NAPA Auto Parts stores used to carry a lot of module - out wiring looms, haven't seen them in the catalogues lately, might be worth a look online.

Hope this helps.



 
65_Impala 
Very Senior Member
Posts: 4440

Reg: 12-29-02
03-26-20 07:50 PM - Post#2789533    
    In response to IgnitionMan

OK, I read that wrong and you want the large cap connector. So, this should be what you want.

https://www.jegs.com/i/JEGS/555/10777/1000 2/-1

Or search Large Cap HEI connector on EBAY.

Or go to Google Images and search a combination of keywords like weatherpack, 4-pin, flat, pigtail, repair, connector to find a connector and source you like. There are a TON of variations available from various sources both as pigtails and as components that you crimp and assemble yourself.

IF you go junkyard diving then some of the LT1 engines have an extension harness on the OPTI and the car side that plugged into that extension harness has the connector. Just another source to look for it since 90's cars with LT1 (or L99) engines might be around too.


  • IgnitionMan Said:
I would have posted a picture of the 8 pin module, but it says I have to pay to do so. So, go to rockauto.com, look up an EFI HEI for a 1986 GMC Safari V6, and it should have a picture of the module those 3 listed 8 pin module connectors fit.



Nice try, but, NO CIGAR.





 
paulo57509 
Senior Member
Posts: 424

Loc: Tracy, CA
Reg: 07-18-00
03-27-20 11:53 AM - Post#2789565    
    In response to 65_Impala

  • 65_Impala Said:
OK, I read that wrong and you want the large cap connector. So, this should be what you want.

https://www.jegs.com/i/JEGS/555/10777/1000 2/-1

Or search Large Cap HEI connector on EBAY.

Or go to Google Images and search a combination of keywords like weatherpack, 4-pin, flat, pigtail, repair, connector to find a connector and source you like. There are a TON of variations available from various sources both as pigtails and as components that you crimp and assemble yourself.

IF you go junkyard diving then some of the LT1 engines have an extension harness on the OPTI and the car side that plugged into that extension harness has the connector. Just another source to look for it since 90's cars with LT1 (or L99) engines might be around too.


  • IgnitionMan Said:
I would have posted a picture of the 8 pin module, but it says I have to pay to do so. So, go to rockauto.com, look up an EFI HEI for a 1986 GMC Safari V6, and it should have a picture of the module those 3 listed 8 pin module connectors fit.



Nice try, but, NO CIGAR.





Thanks, but that pigtail won't work either. The Weatherpack connector is the wrong gender. Here's what he's working on:



I'll tell him to being the old harness and check with NAPA. Otherwise, it's going to be a cut/splice ( Link ) or a field trip to the bone yard.

Thanks again for the help.

1987 IROC-Z 5.0L
1992 Lumina Euro 3.1L
2003 GMC Safari


Edited by paulo57509 on 03-27-20 11:57 AM. Reason for edit: No reason given.

 
65_Impala 
Very Senior Member
Posts: 4440

Reg: 12-29-02
03-27-20 04:55 PM - Post#2789580    
    In response to paulo57509

Grab that connector and crimp some small spade terminals onto it to connect to the module.



 
IgnitionMan 
Valued Contributor
Posts: 3717

Reg: 04-15-05
03-28-20 03:16 PM - Post#2789658    
    In response to paulo57509

Yes, the OP is aware of it. He has it right, and the wire parts/connector are probably still available at GM dealers everywhere on earth, and in the adapter wiring looms between the 7 pin module and aftermarket EFI providers, like HOLLEY, as I mentioned previously.

And that new 4 pin connector in your last post above is the one you listed previously, 3 times, also trying to discredit me, and, IS ALSO WRONG, WRONG, WRONG, JUST LIKE YOU ALWAYS ARE.

LOOK at the OP's picture, it has 3, NOT 4 terminals, 3, 3, 3, 3, NOT YOUR 4, of which, does work on the SMALL DIAMETER 8 pin GM EFI-HEI module, NOT THE 7 PIN large diameter distributor modules.

Nice try at once again, as usual, only trying to discredit me, but, as always, ONCE AGAIN, NO CIGAR FOR YOU, AS USUAL.

Your antics are just plain not worth encountering, and everybody knows it. I am past, no, way, way past it. I just plain refuse to have a battle of wits with a completely and totally unarmed person, YOU.

I will, however, always defend myself against you, because this site doesn't seem to care about me being constantly attacked by you, against your efforts to cause as much trouble for me, no matter how wrong you always are, as you possibly can.

Try, once, to get it right, we'd all like to see that, just once.

FED UP, COMPLETELY AND TOTALLY WITH YOU. Nobody here needs your BS, nor hearing me defend myself against your constant attacks.

There is another post someplace about reusing the crimped metal wire end on the bulkhead connector over again, instead of simply buying one from GM for less than a buck. These are the crimp ends for the bulkhead connector.

The problem with attempting to reuse those crimped on wire ends is, they are meant for ONE crimp cycle only, and, when pried apart, mostly break the crimped metal apart. IF one does come apart in one piece, it has less than a 50/50 chance of re-crimping to good, and is strength compromised, with the real possibility of failure.

If the wire is soldered to the old fitting, there is a distinct possibility the wire strands will fail by separating, and the vehicle will rattle to a stop in its tracks. It is hard to get to the fitting to re-solder the wire when the car is stopped on the freeway, or, miles from nowhere.



 
65_Impala 
Very Senior Member
Posts: 4440

Reg: 12-29-02
03-28-20 05:40 PM - Post#2789675    
    In response to IgnitionMan

  • IgnitionMan Said:
LOOK at the OP's picture, it has 3, NOT 4 terminals, 3, 3, 3, 3, NOT YOUR 4, of which, does work on the SMALL DIAMETER 8 pin GM EFI-HEI module, NOT THE 7 PIN large diameter distributor modules.



The Weatherpack connector the OP asked about on those distributors has 4 wires. 4 4 4 4 4 wires. 3 wires to the module and 1 to ground for a total of 4 wires. These are the distributor and car sides of the Weatherpack connector.

https://www.jegs.com/i/JEGS/555/10776/1000 2/-1
https://www.jegs.com/i/JEGS/555/10777/1000 2/-1

The problem is the module end of the harness. That end doesn't seem to be available anywhere. But, the module is small spades so just use small spade connectors crimped onto the wires of the weatherpack connector.

Since you think the harness is available at GM dealers everywhere then why don't you post the p/n? I personally doubt GM bothers with a small low demand wiring harness from 35+ year old cars anymore. There would have been a low demand for that harness even when the cars were new. Holley won't have the harness either. They'd rather you buy their distributors.

I'm trying to help the OP with ACTUAL links to available parts. I could care less about your fragile ego. It's amazing how big a crybaby you can be when I simply responded to your wrong information with the exact same words you posted that were directed at me.

I'm also pretty sure everyone in this thread could care less about your bulkhead terminal rant.



 
IgnitionMan 
Valued Contributor
Posts: 3717

Reg: 04-15-05
03-29-20 02:10 PM - Post#2789742    
    In response to 65_Impala

YUP, already pointed that out above, still, 3 wires connectors to the module, and ONE separate for ground.

Keep going, everybody knows the only reason you post is to try to debunk me, and this time, you pointed that out to EVERYBODY.

Stay absolutely useless, it becomes you.



 
65_Impala 
Very Senior Member
Posts: 4440

Reg: 12-29-02
03-29-20 05:28 PM - Post#2789762    
    In response to IgnitionMan

  • IgnitionMan Said:
Stay absolutely useless, it becomes you.



LOL, You didn't tell him anything he didn't already know. Where are your links to parts? You posted lots of could have's and would have's but neither is any use.

I checked GM online. NOTHING.
I checked Holley. NOTHING.

Shrug, as the OP already posted, the harness itself and the module end of the harness isn't available from anywhere. So, yet again I will post to get the Weatherpack connector with pigtail wires and crimp small spade connectors onto the wires and be done with it. 2.8mm female spade terminals should plug right on and are readily available online.





 


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