The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Electrical

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 05-02-2017, 02:02 PM   #1
bpmack16
Registered User
 
Join Date: Sep 2013
Location: Andover
Posts: 153
Battery relocation question

So I am relocating my battery to the rear of the truck. It's a 1972 c10. Where the battery was up front a small wire came off the positive turminal and ran to a small junction box on the passenger side fender, where it linked up to 2 other wires. My question is, dose this wire have to be run all the way back to the relocated battery or can I jump from the starter. Here is a picture of the junction box I am talking about. Thank you.
Attached Images
 
bpmack16 is offline   Reply With Quote
Old 05-02-2017, 05:55 PM   #2
VetteVet
Msgt USAF Ret
 
VetteVet's Avatar
 
Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 7,665
Re: Battery relocation question

The answer is simple but rather lengthy. If you know the function of the small wire and the path of the other wires it helps.
The small wire in question, in the stock configuration, assuming no one has replaced it with a plain piece of wire, is a fusible link wire, which protects the secondary wiring circuits in the truck. The primary wiring is just the large cables to the starter and the negative to the frame.

There should be 3 wires on the small junction that you refer to. The fusible link, the power wire to the main junction for all the truck circuits and if you have the gauge dash with the battery gauge AKA (ammeter), a third wire that goes directly to the dash cluster plug to terminal 12.

If you connect the positive battery cable to the solenoid on the starter you will still have to feed the secondary circuit on the fender junction. There are several ways to do that depending on what your plans are for relocating the battery. If you're just going to move the battery to clean up the engine bay then all you have to do is run a 10 gauge wire to the end of the fusible link from the solenoid. If you are upgrading the whole system then you will have to eliminate the fusible link and use a bigger junction to carry the current.


Here's the stock setup.

Name:  fusible link.jpg
Views: 63
Size:  91.8 KB

Here's an example of wiring to a main junction and using two other fusible links in the circuits. This is what the later trucks did after they went to HEI ignition and ditch the ammeter for the voltmeter.


Name:  Wiring2 (3).jpg
Views: 63
Size:  32.0 KB
__________________
VetteVet

metallic green 67 stepside
74 corvette convertible
1965 Harley sportster
1995 Harley wide glide

Growing old is hell, but it beats the alternative.
VetteVet is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 09:04 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 1997-2013 67-72chevytrucks.com