Wiring positive to starter, alternator and negative to body, etc, diagram needed?

Tiny
FRAZIER88
  • MEMBER
  • 1997 CHEVROLET SUBURBAN
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 287,764 MILES
I just did an engine swap and while I was at work someone messed around my garage so now, I have to replace both positive and negative terminals. Could you help me with a schematic, so I know what and where each one connects to. Like pos to starter, alternator, etc, and neg to body, etc. I could use some help here and I appreciate you guys for real!
Saturday, December 30th, 2023 AT 3:56 PM

7 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Sure, here are the main wiring diagrams for the battery, main ground and the alternator, please let me know if you need anything else. If you have a question just upload an image and I can help walk you through the problem.

Additional ground straps are used to connect the body and frame to the engine and transmission. Always connect all ground straps to ensure a good ground path to the battery from all electrical components.

Check out the images (below). Please upload pictures or videos of the problem so we can see what's going on.
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Sunday, December 31st, 2023 AT 2:11 PM
Tiny
FRAZIER88
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  • 39 POSTS
What dose this connect to or connect to it?
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Monday, January 1st, 2024 AT 12:52 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Thanks for the image and video, it looks like that is an aftermarket device I don't recognize, does your vehicle have dual batteries? Also if you can back up a little when doing the pics and videos it will help me see more fo what's going on.
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Tuesday, January 2nd, 2024 AT 9:05 AM
Tiny
FRAZIER88
  • MEMBER
  • 39 POSTS
  • 1997 CHEVROLET SUBURBAN
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 287,764 MILES
Okay, I hooked my positive up to the alternator, starter, and fuse hub under the hood my neg to the right fender well and front of the motor so what's this and where is the 2nd wire for my starter.
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Tuesday, January 2nd, 2024 AT 9:40 AM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Does that lead come off of the battery cable itself, because on aftermarket battery cables then have an auxiliary power lead that is used in some applications but not all. If you can back up slightly with the video or image so I can see the arrangement it will help me see what's going on.
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Tuesday, January 2nd, 2024 AT 9:43 AM
Tiny
FRAZIER88
  • MEMBER
  • 39 POSTS
Okay, that thing is mounted behind the battery on the fender well and that is the only cable coming off of it and I can't see another wire anywhere that would connect to it but I'll upload pictures when I get home in the morning.
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Wednesday, January 3rd, 2024 AT 12:38 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
It looks like it is a junction block for the battery cables that is why I asked if you had two batteries. When you upload more images we can continue.
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Wednesday, January 3rd, 2024 AT 9:33 AM

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