Engine Harness Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

robber grin · 07-11-2020, 11:58 AM

I'm sure this will seem painfully obvious to someone (at least I'm hoping it will)...

Last September I pulled my 283 (with pertronix distributor / coil) because the old small mouse was TIRED - life happened - now I'm trying to finish up a "simple" 350 (OEM HEI) install nearly a year later (life).

The picture is my engine harness (from Classic Parts) that worked fine for the first install but I (am simple and) have lost all recollection of the green wire's purpose - I think it would have been for + coil for the old points set up before the conversion (and I think I still connected it after Pertronix Conversion)

So can someone just have mercy and help me verify and remember before I make a mistake?

Thank you for your consideration.

Stay well and blessed.

**The Rocknrod** · 07-11-2020, 12:10 PM

From what I recall Green is Temp, blue was oil.

Maybe pink is coil and white is coil?

**The Rocknrod** · 07-11-2020, 12:13 PM

Wait I found a wire harness thread, post #8 is OEM - http://67-72chevytrucks.com/vboard/s...d.php?t=378484

roll_the_dice · 07-11-2020, 12:19 PM

maybe I am wrong, but I just went and looked at my AAW setup and white is tach, pink is batt on the HEI distributor and green is temp sensor.

AcampoDave · 07-11-2020, 08:00 PM

The thing about the OEM wires and the HEI is that those little wires simply aren't cut out for powering the HEI. I use a 10 gauge wire from one of the ignition hot spades on my fuse block for mine. Some say splice an inline fuse on the wire, others say don't. Personally I don't. As for the OEM wires you're looking for one that lights a test light when the key is on. Guage sender wires wont do that.

07-11-2020, 11:58 AM	#1
robber grin Registered User Join Date: Apr 2012 Location: Sunny Youngwood PA Posts: 463	Engine Harness Question I'm sure this will seem painfully obvious to someone (at least I'm hoping it will)... Last September I pulled my 283 (with pertronix distributor / coil) because the old small mouse was TIRED - life happened - now I'm trying to finish up a "simple" 350 (OEM HEI) install nearly a year later (life). The picture is my engine harness (from Classic Parts) that worked fine for the first install but I (am simple and) have lost all recollection of the green wire's purpose - I think it would have been for + coil for the old points set up before the conversion (and I think I still connected it after Pertronix Conversion) So can someone just have mercy and help me verify and remember before I make a mistake? Thank you for your consideration. Stay well and blessed. Attached Images Last edited by robber grin; 07-11-2020 at 12:09 PM.

07-11-2020, 12:10 PM	#2
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: Engine Harness Question From what I recall Green is Temp, blue was oil. Maybe pink is coil and white is coil? __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?

07-11-2020, 12:13 PM	#3
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: Engine Harness Question Wait I found a wire harness thread, post #8 is OEM - http://67-72chevytrucks.com/vboard/s...d.php?t=378484 __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?

07-11-2020, 12:19 PM	#4
roll_the_dice Registered User Join Date: Mar 2016 Location: Manlius, NY Posts: 1,698	Re: Engine Harness Question maybe I am wrong, but I just went and looked at my AAW setup and white is tach, pink is batt on the HEI distributor and green is temp sensor. __________________ 1965 C10 LWB Stepside 1964 GMC 1 Ton Dually Instagram #notaratrodnotashowtruck

07-11-2020, 08:00 PM	#5
AcampoDave Registered User Join Date: Feb 2013 Location: central California Posts: 2,780	Re: Engine Harness Question The thing about the OEM wires and the HEI is that those little wires simply aren't cut out for powering the HEI. I use a 10 gauge wire from one of the ignition hot spades on my fuse block for mine. Some say splice an inline fuse on the wire, others say don't. Personally I don't. As for the OEM wires you're looking for one that lights a test light when the key is on. Guage sender wires wont do that.



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