Here’s more of the scoop.
70 C10- old harness is cracked and frayed.

American auto wire 13 circuit universal for the body( lights, sides, column, etc). 510004

Painless LS standalone harness. 60217

I am using the stock ignition and headlight switch from the 70 C10.


1. The AAW calls for the 3A to go to the distributor. Where does it go on the LS setup?

2. I assume the oil sender, tach, temp stuff from the AAW are redundant as the LS harness has that covered. Correct?

3. Do I hook up 2B red on the AAW as per diagram direct to starter HOT?

4. Do I need 4A alternator ignition on the AAW? I assume again the LS harness has it covered.

5. Does Painless 6.2.6 pink splice in with pink AAW pink 3B wire to give both keyed power?

It seems some will be powered by the LS harness: oil, temp, VSS, tach, but some will need the AWW: dash lights, dimmer,

I will have some more coming, but this is a start.

I appreciate the help. Electrical can be frustrating as all hell, and when you leave it for a bit it’s hard to continue on…

Give me changing ball joints any day…

Hmm, where was I? (When coming back after a day of partially doing ball joints…)

Oh! That’s easy! Right there! No problem.
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Last edited by Fox; 07/09/2025 3:51 AM.

1970 Chevrolet C10
Grandpa's -- My first truck -- In progress to shiny
Follow the build in the Project Journal
1950 Chevrolet 1-Ton Dually
"Ole Red Girl"
In the Stovebolt Gallery
More pictures here
1951 GMC 9430 1 ton dually--Shiny! | 1972 Chevrolet C20- Rusty- the puzzle box lid for the C10 | 1962 AMC Rambler American- my wife's
Parts trucks-
1951 GMC 9300 | 1951-GMC 9430 | 1951- Chevrolet 1300