wiring question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Tonner · 05-26-2018, 07:22 PM

4 wires come out of this harness under the cowl. Purple and Yellow #1 were clearly marked "r" and "S" for the solenoid. Green and yellow #2 were not labeled and have different ends on them. Green has a heat wrap on it. Where do these go?
Thanks.

franken · 05-26-2018, 07:32 PM

Green sounds like the temp sensor in the head. Yellow suggests the wire from the not S terminal on the solenoid to the coil. Since there's an HEI in the pic, the yellow isn't used.
There's a wiring diagram on this site if you want to look a little.

Tonner · 05-26-2018, 07:50 PM

I put the HEI in. I was going to come straight off the ignition switch to power it. That means I can just abandon this yellow wire then?
Thanks.

SeanB242 · 05-26-2018, 11:53 PM

You don’t need the yellow wire with the hei. Tape it up or follow it back to the harness and cut it is what I would do.

**Steeveedee** · 05-27-2018, 08:51 PM

Make sure to take the yellow wire off the "R" terminal on the starter solenoid, just to make certain that something crazy doesn't happen later.

**LockDoc** · 05-27-2018, 09:49 PM

Quote:

Originally Posted by Tonner

I put the HEI in. I was going to come straight off the ignition switch to power it. That means I can just abandon this yellow wire then?
Thanks.

I run all of my HEI's off of the "IGN UNFUSED" terminal on the fuse block.

LockDoc

**Steeveedee** · 05-27-2018, 11:41 PM

Quote:

Originally Posted by LockDoc

I run all of my HEI's off of the "IGN UNFUSED" terminal on the fuse block.

LockDoc

Yup. I learned that fix right here on this board. I had done it with a solenoid before that.

05-26-2018, 07:50 PM	#3
Tonner Registered User Join Date: Apr 2015 Location: Spokane, Washington Posts: 39	Re: wiring question I put the HEI in. I was going to come straight off the ignition switch to power it. That means I can just abandon this yellow wire then? Thanks.

05-26-2018, 11:53 PM	#4
SeanB242 Registered User Join Date: Mar 2017 Location: Bonne Terre MO Posts: 192	Re: wiring question You don’t need the yellow wire with the hei. Tape it up or follow it back to the harness and cut it is what I would do.

05-27-2018, 08:51 PM	#5
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,676	Re: wiring question Make sure to take the yellow wire off the "R" terminal on the starter solenoid, just to make certain that something crazy doesn't happen later. __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

05-26-2018, 07:22 PM	#1
Tonner Registered User Join Date: Apr 2015 Location: Spokane, Washington Posts: 39	wiring question 4 wires come out of this harness under the cowl. Purple and Yellow #1 were clearly marked "r" and "S" for the solenoid. Green and yellow #2 were not labeled and have different ends on them. Green has a heat wrap on it. Where do these go? Thanks.

05-26-2018, 07:32 PM	#2
franken Registered User Join Date: Jun 2013 Location: Somewhere Posts: 3,123	Re: wiring question Green sounds like the temp sensor in the head. Yellow suggests the wire from the not S terminal on the solenoid to the coil. Since there's an HEI in the pic, the yellow isn't used. There's a wiring diagram on this site if you want to look a little.



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