The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Where does the negative battery cable wire go?

**mr48chev** · 10-23-2022, 12:42 AM

Your secondary ground wire off the battery cable just goes to a spot on the body where you are comfortable with putting it. It serves as a more direct ground to the battery for the lights and for other accessories.

The purple wire has to go to the S post of which ever solenoid you are going to use to energize the starter. Without it properly connected the solenoid isn't going to function and you won't be able to crank the engine.

You don't need the resistor bypass wire from the R post on the solenoid with HEI.

When I changed my 71 to HEI I ran the wire for the hei from one of the hot when the key is on pins on the Fuse block so I could run a heavier gauge wire to the hei.

Make sure that you have the correct HEI wire terminal to plug into the HEI rather than just use a female slide. A female slide will slide at an inopportune time if it loosens up just a tad. Been there done that.

10-23-2022, 12:42 AM	#25
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,817	Re: Where does the negative battery cable wire go? Your secondary ground wire off the battery cable just goes to a spot on the body where you are comfortable with putting it. It serves as a more direct ground to the battery for the lights and for other accessories. The purple wire has to go to the S post of which ever solenoid you are going to use to energize the starter. Without it properly connected the solenoid isn't going to function and you won't be able to crank the engine. You don't need the resistor bypass wire from the R post on the solenoid with HEI. When I changed my 71 to HEI I ran the wire for the hei from one of the hot when the key is on pins on the Fuse block so I could run a heavier gauge wire to the hei. Make sure that you have the correct HEI wire terminal to plug into the HEI rather than just use a female slide. A female slide will slide at an inopportune time if it loosens up just a tad. Been there done that. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.