Wiring HEI distributor with mini starter - Team Camaro Tech
Electrical & Wiring Troubleshooting electrical.

 3Likes
  • 1 Post By dave ray
  • 1 Post By graeme
  • 1 Post By dyno jonn
 
LinkBack Thread Tools Display Modes
post #1 of 15 (permalink) Old Jul 7th, 19, 01:05 AM Thread Starter
Probationer
James
 
Join Date: Jul 2019
Location: Syracuse, NY
Posts: 5
Garage
Wiring HEI distributor with mini starter

Hi everyone,

So I recently rebuilt my engine and in the process upgraded my points distributor to an HEI, and my factory starter to a mini starter. The factory starter had 3 terminals (Battery+, S, R), and the new starter has 2 terminals (Battery+, S). Based on the instructions and what I read online, the R terminal was the resistor wire bypass for the coil (so that the coil would have 12v on startup) and that for HEI distributors it could be removed (So I did just that). I also removed the resistor wire that was connected to the coil from the bulkhead connector, and replaced it with a 12-gauge wire (This will be the power for my HEI).

Note: I checked the wiring diagram and determined that this pin on the bulkhead connector ties into the ignition switch (12-P wire from the bulkhead on the factory wiring diagram)

So with the wiring set up as it is (to my understanding), when the key is in the RUN position the wire to the starter S terminal should read 0V and the 12-gauge wire to the coil should read 12V. Then when the key is switched to the START position, the wires to both the starter S terminal and coil should read 12V.

Upon testing, when the key is in the RUN position I am reading 0V to the starter S terminal and 12V to the coil (which makes sense). However, when testing with the key in the START position, I am reading 12V to the starter S terminal and 0V to the coil (which does not makes sense?). I also tested the IGN terminal on the fuse box and got the same results.

Unless I am mistaken, the HEI requires 12V in RUN and START. So is there a different terminal that I should be using instead of the IGN?

Thanks for the help!

PS: Sorry if this ends up being a double posting. My page crashed when trying to post the first time and I couldn’t find anything to suggest that the tread had actually been posted.
JamesJ31 is offline  
Sponsored Links
Advertisement
 
post #2 of 15 (permalink) Old Jul 7th, 19, 04:50 AM
Senior Tech
Jon
 
Join Date: Dec 2002
Location: back in the Hew-Hess-Hay
Posts: 5,932
Re: Wiring HEI distributor with mini starter

An ignition switch from a 75 or later vehicle might be the solution if you have a 69 vehicle or later with the same type of switch. If not, some sort of relay system may be required.

Jon N

The only reason someone would want insurance is if they want to pay someone elses bills or want someone else to pay their bills.
dyno jonn is online now  
post #3 of 15 (permalink) Old Jul 7th, 19, 10:47 AM Thread Starter
Probationer
James
 
Join Date: Jul 2019
Location: Syracuse, NY
Posts: 5
Garage
Re: Wiring HEI distributor with mini starter

If I were to replace the ignition switch, is there any way to know before buying it if it would pass 12V in RUN and START?

"It's not about the miles per gallon, It's about the smiles per gallon"
JamesJ31 is offline  
 
post #4 of 15 (permalink) Old Jul 7th, 19, 10:55 AM
Senior Tech
Jon
 
Join Date: Dec 2002
Location: back in the Hew-Hess-Hay
Posts: 5,932
Re: Wiring HEI distributor with mini starter

No way I know to be sure. If you can find an electrical whiz, maybe comparing wiring schematics would be helpful.

Jon N

The only reason someone would want insurance is if they want to pay someone elses bills or want someone else to pay their bills.
dyno jonn is online now  
post #5 of 15 (permalink) Old Jul 7th, 19, 06:04 PM
Senior Tech
Rufas
 
Join Date: Oct 2012
Location: USA
Posts: 554
Re: Wiring HEI distributor with mini starter

If you have an IGN or IGNITION terminal on the fuse box, check it for having battery voltage at both run and start key positions to ground, cold everywhere else. If hot in those two positions, use that to power up the HEI, IGN to BATT on the HEI cap, done. 12 or 10 gauge wire will work just fine.
allanjs likes this.
dave ray is offline  
post #6 of 15 (permalink) Old Jul 8th, 19, 08:58 PM Thread Starter
Probationer
James
 
Join Date: Jul 2019
Location: Syracuse, NY
Posts: 5
Garage
Re: Wiring HEI distributor with mini starter

I checked each of the terminals on the fuse box and unfortunately none of them are hot in RUN and START (Except for the battery which is always hot). What I am currently trying is one of the diode wires from the starter. They are supposed to be a single direction flowing wire that will supply the 12V during cranking from the starter (essentially a replacement for the R terminal on the starter). If anyone has tried one of these before I'd love to hear your thoughts. Ill post an update with my results.

Here is a link to the diode wire I'm talking about if anyone is interested: Summit P/N - SUM-890175

"It's not about the miles per gallon, It's about the smiles per gallon"
JamesJ31 is offline  
post #7 of 15 (permalink) Old Jul 9th, 19, 05:39 AM
Senior Tech
Al
 
Join Date: Nov 2002
Location: Vancouver, USA
Posts: 10,512
Re: Wiring HEI distributor with mini starter

What you're describing sounds like you have a '67 in which the ign wire is cold while cranking. I "believe" the solution is to install a '68 ign switch, which has both the run and start wires hot while cranking. I do not know if it is a plug and play swap, you'll have to do a little digging around. It has been posted here before. Ign switch from 69 and later is a totally different deal


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
BPOS is offline  
post #8 of 15 (permalink) Old Jul 9th, 19, 06:10 AM
Senior Tech
Jon
 
Join Date: Dec 2002
Location: back in the Hew-Hess-Hay
Posts: 5,932
Re: Wiring HEI distributor with mini starter

James garage picture shows a 69, fwiw.

Jon N

The only reason someone would want insurance is if they want to pay someone elses bills or want someone else to pay their bills.
dyno jonn is online now  
post #9 of 15 (permalink) Old Jul 9th, 19, 07:28 AM
Moderator
John
 
Vega$69's Avatar
 
Join Date: Sep 2010
Location: Vegas NV/Wesley Chapel FL
Posts: 13,050
Garage
Re: Wiring HEI distributor with mini starter

See attached diagram for the 69 Camaro Ignition switch.

The Pink Wire is HOT in the RUN and START Position. At the bulkhead connector it is a resistance wire to the coil. When HEI it would go to the BAT side.

If the resistance wire was changed at the bulkhead to to the BAT side of the HEI it would still be HOT in both the RUN and START position.

The YELLOW wire from the starter also goes to the BAT side and is only HOT in the START position to give full BAT power to the coil when starting. Eliminate the YELLOW wire when using HEI as you already have full BAT power to the coil if the resistance wire was changed at the bulkhead connector.

So either your switch is bad (or wired wrong) or the wire from the bulkhead connector is the problem.

Click image for larger version

Name:	69 Ignition Diagram.JPG
Views:	53
Size:	54.5 KB
ID:	227989

2017 Corvette ZO6 with ZO7 Option
66 Chevelle Protour LS3/525(SOLD AT Mecum 2018)
69 SS396 Cortez Silver(SOLD)
69 Z28(Sold)
69 Pro Tour - LS3/T56
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
(SOLD)
69 Pro Tour - LS7/T56 (SOLD)
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

69 Z28/RS Tribute355/5 Speed (SOLD)
69 RS Clone 427/TH400 (SOLD)
67 RSZZ502/5 Speed (SOLD)
69 Camaro 406 SBC/TH400 (SOLD)
Vega$69 is offline  
post #10 of 15 (permalink) Old Sep 15th, 19, 06:27 AM
Apprentice
Graeme
 
Join Date: Sep 2018
Location: Victoria, Australia
Posts: 15
Re: Wiring HEI distributor with mini starter

I'm having the same problem with my 67. Have a mini starter with a HEI dissy and not sure how to wire it up. A previous owner had hacked up the wiring so I'm in the process of working out where the wires go and replacing them with the correct coloured wires. Trying to work out how to get power to the HEI when the key is in the start position. Buying a new wiring loom is out of the question as my car has been converted to right hand drive, (I'm from Australia), so the wiring would have to be modified to fit. Thinking of using a relay switch to run a wire from the battery to the HEI and run a wire from the start terminal to activate the relay when the key is turned to Start and deactivates when the key is at Run/Ign. This way I can still use the stock purple wire as normal to power the HEI when running and not have to worry about power going back to the starter from the second wire.
dyno jonn likes this.
graeme is offline  
post #11 of 15 (permalink) Old Sep 15th, 19, 08:29 AM
Senior Tech
Jon
 
Join Date: Dec 2002
Location: back in the Hew-Hess-Hay
Posts: 5,932
Re: Wiring HEI distributor with mini starter

Graeme, you may be able to feed your coil from the purple wire, as long as you put a diode in the feed wire to keep from back feeding the starter solenoid. That should do away with needing a relay.

Anyone have any thoughts on doing it that way?
JamesJ31 likes this.

Jon N

The only reason someone would want insurance is if they want to pay someone elses bills or want someone else to pay their bills.
dyno jonn is online now  
post #12 of 15 (permalink) Old Sep 15th, 19, 08:53 AM Thread Starter
Probationer
James
 
Join Date: Jul 2019
Location: Syracuse, NY
Posts: 5
Garage
Re: Wiring HEI distributor with mini starter

I used a diode and its been working great. When I was dealing with this problem I didn't want to mess around with installing a relay, which is why I went with the diode. What I ended up doing was removing the old resistor wire leading from the bulkhead connector to the distributor and replacing it with a regular 12ga line. Then hooked up the diode wire to the starter. After the diode is hooked up you just have to run that wire back up to the HEI and connect both the diode wire and the new bulkhead wire into the HEI BAT terminal.

"It's not about the miles per gallon, It's about the smiles per gallon"
JamesJ31 is offline  
post #13 of 15 (permalink) Old Sep 15th, 19, 11:23 AM
Senior Tech
Rufas
 
Join Date: Oct 2012
Location: USA
Posts: 554
Re: Wiring HEI distributor with mini starter

A diode is workable. Please be aware, they can fail, both ways, no continuity, continuity both directions.

Please be aware, most of the mini-starter manufacturers offer a solenoid for their units that has the R terminal, simple swap solenoids. Contact them directly.

If no workable IGN terminal, remove bulkhead connector on firewall side, new terminal from GM, swap resistor wire terminal to full voltage wire, tape off resistor wire connector. This will give you full battery voltage power to the HEI on run.

Diode off the S solenoid terminal, or, alternate solenoid.

The resistor wire in our cars is silver stranded for the resistance, and about 7 feet long, I do not recommend removing it from its loom, but simply taping both ends off and then, to the loom, so it remains in the loom/car.
dave ray is offline  
post #14 of 15 (permalink) Old Sep 15th, 19, 12:44 PM
Senior Tech
 
Join Date: Nov 2018
Posts: 1,160
Re: Wiring HEI distributor with mini starter

greame.

your RH drive will not affect how the HEI gets its +12v unless the ignition switch has been rewired for some reason. If the fuse block is still next to the DS kick panel just run a 12 gauge wire (it can be any color but white is stock) from IGN terminal to the + terminal of coil. The stock white resistance wire that did go to the coil you can just tape back in the loom
SoCal805 is offline  
post #15 of 15 (permalink) Old Sep 15th, 19, 06:59 PM
Apprentice
Graeme
 
Join Date: Sep 2018
Location: Victoria, Australia
Posts: 15
Re: Wiring HEI distributor with mini starter

Unfortunately a lot of the wiring under the dash has been butchered, wires have been cut and other wires joined up using different colours and the ignition switch as been rewired with different coloured and extra wires. I have a wiring diagram and am slowly sorting it all out, replacing the wires with the correct coloured wire.
graeme is offline  
Sponsored Links
Advertisement
 
Reply

Tags
hei, mini starter, wiring

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome