The Stovebolt Site Forums The Shop Area The Electrical Bay C10 LS ignition wiring with harness

2002 LM7 engine
I’m using an American auto wire for the body and have a painless harness for the engine.
Will the American auto wire 3B wire (which the instructions say the 3A end is the 12v for the distributor) tie into the painless 6.2.6 fuse block ignition for the injection system?

Is the AAW harness set up to use a resistor/bypass wire from the starter?

Do you have a full set of the AAW instructions available online for review? We could be a lot more helpful with a full set of the documents.

Alternatively, can you tell us what AAW part number you are using?

I’m using the AAW 510004 kit.

Yes, based on the 510004 wiring instructions, I would agree that 3A is what you want for 6.2.6

What ignition switch are you using? You will want ti make sure that the IGN terminal is powered in both the run and start key positions.

Some switches have that by default, some do not.

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.

AAW diagrams 510004

Suggestion on how to proceed.

1. Lay the AAW aside. Don't worry about it right now.
2. Don't worry about the ignition switch or gauges.
3. You will have several things on the Painless AND the AAW that don't apply, redundant, optional and will not be used.
4. After you are done with painless, get the motor started to be sure all is well. After painless install we will see what tne motor needs for just a test start.
5. Then do what is needed from the AAW...... gauges, lights, Light switch and accessories.
6. You ask about distributor wiring, I don't think you have one, do you?

So...did this motor run? Do you know if it runs for sure? What happened to it's harness? What trans are you using.
I am not a Vortec, computer controlled guy, but since you are using a new harness and if you know the motor runs, that helps.
You probably will have two fuse boxes to mount. I will help as you go along, one phase at a time, if I can.

In my opinion it is critical to get motor running. With that motor in a 70 truck, you could have all kinds of issues'
Related to inputs:
Evap sensors and etc.
VSS
Gas tank vapor sensor
Canister vent
Canister purge
Programming
OBD
O2 sensors

I never think it is worth it to put that kind of V8 in. Lots of folks do however.