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#1 |
Who Changed This?
![]() Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,429
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Re: Ground strap locations
All good information, there! I would add that using a copper wire as a ground strap is going to lead to early failure as the copper work hardens when it flexes and will break sooner rather than later. That's why the ground straps are not copper. The steel is going to eventually break, too, but the large multitude of strands makes the straps quite long-lasting.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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#2 |
Senior Member
![]() Join Date: Oct 2013
Location: Santa Paula, CA
Posts: 600
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Re: Ground strap locations
Glad to see this thread still around, and even more pertinent info added. Heres a tip I found online while searching ground straps. You can revive wires to practically brand new. Even the most corroded and dirtiest of wires. You need: 2 containers(cups,bowls,jars,tupperware,etc.) In one container add 1 tablespoon of table salt and add vinegar to a level just below full(white,cider,balsamic, etc. Don't matter.) You're making an acidic solution to dissolve the surface contaminants on the copper strands of the wire. I the other container add 1 tablespoon of baking soda and fill to a level just below full with plain water. This will neutralize the acid solutions effect on the wires. Add as much salt to the vinegar that will dissolve, and add more baking soda to the plain water to make it cloudy. Now just swirl your wire in the salt/vinegar solution for a minute or two and you will see it return to it's original form, remove the wire and immediately dunk it into the baking soda/water solution for 10-20 seconds. BAM! clean wires ready to solder some ring terminals onto to make ground straps.
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1972 C/10 LWB - Mine 1964 C/10 LWB - My Dad's Instagram: Mike_The_Grad Last edited by Mike_The_Grad; 08-03-2019 at 10:49 PM. Reason: Added info |
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#3 |
Registered User
Join Date: Jun 2012
Location: stillwater ny
Posts: 16
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Re: Ground strap locations
i took a lead wire and ground out my tail light socket to my frame and it corrected my problem for some reason my tail lights were not grounding out enough that was my fix
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#4 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,389
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Re: Ground strap locations
Examples on my Blazer are shown here: http://67-72chevytrucks.com/vboard/s...9&postcount=53 and some harness grounds here (note the use of star washers on fender and firewall and captured toothed washers on the rad support): http://67-72chevytrucks.com/vboard/s...1&postcount=54
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1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#5 |
Registered User
Join Date: Apr 2015
Location: East Tn (In the heart of the Smoky Mtns)
Posts: 1,869
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Re: Ground strap locations
I didn’t take the time to go through all the post, so if what i say has been covered, here it is again.
![]() One ground that is so important but often overlooked, is grounding the back of the Gauge panel. Put a small grounding wire at each end of the panel to the dash panel, and it’ll fix the issues with the lights, that plague so many. ![]() |
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#6 |
Registered User
Join Date: Jun 2012
Location: stillwater ny
Posts: 16
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Re: Ground strap locations
i will try that on my 1969gmc thank you
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#7 |
Registered User
![]() Join Date: Jul 2015
Location: Phoenix, AZ
Posts: 1,335
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Re: Ground strap locations
Subscribed!
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#8 |
Registered User
Join Date: Jun 2013
Location: Somewhere
Posts: 3,077
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Re: Ground strap locations
It's been stated before (as well as quite a bit of misinfo).
All the current that flows out of the battery/alt has to flow back into the battery/alt via the grounds. |
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#9 |
Registered User
Join Date: Nov 2018
Location: South San Francisco CA,
Posts: 436
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Re: Ground strap locations
I have been thinking about this with my son's truck. I found one ground, and it was broken. So, my question is, if I wanted to make up straps, what gauge wire should I be using? i have a tone of wire laying around from different projects, so I thought it might be a good weekend project for me and my son. Thoughts? Or is it better to get the right wire from GMCPaul or another vendor?
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#10 |
Senior Member
![]() Join Date: Dec 2009
Location: TN.
Posts: 8,129
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Re: Ground strap locations
I would say somewhere around 10 gage,
would be comparable to the original strap. Main thing to think about doing it this way is, Your ground will be as good as your crimp and contact to frame or block or_____. If you have a good crimping tool on clean contact point This will be a improvement. This will be a good learning experience for your son. ![]() .
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________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build |
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#11 |
Who Changed This?
![]() Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,429
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Re: Ground strap locations
Ground straps are made of braided wire. You can buy them at your local parts store or from one of the vendors who sell here
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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#12 |
Senior Member
![]() Join Date: May 2010
Location: Wisconsin & Arizona
Posts: 4,844
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Re: Ground strap locations
GMCPAULS sells ground straps.
https://gmcpauls.com/Electrical.htm Classic Trucks does also. https://www.classicparts.com/Wiring-...oducts/287/3/0
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Jim |
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#13 |
Registered User
![]() Join Date: Aug 2019
Location: Cheraw
Posts: 1,305
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Re: Ground strap locations
I am making my own harness's, engine, front lamp, tail lamp and dash. They all will have ground wires added that will go back to the battery, the core support the frame, the dash and the bed of the truck. It's not a frame off restoration, so the extra wires will not matter. All new cars and trucks have ground wires like that. If you are installing an LS engine into a early model truck that will have a computer you should think about extra ground wires.
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#14 |
Registered User
Join Date: Jan 2007
Location: Puyallup, WA
Posts: 1,662
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Re: Ground strap locations
Yup, that location is identified in the very first post.
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72 C10 lwb fleetside -stock 350/350 combo Last edited by 68 P.O.S.; 06-21-2020 at 06:43 AM. |
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#15 |
Senior Member
![]() ![]() Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 9,815
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Re: Ground strap locations
Well, sort of. If you look at that drawing, and the associated link and picture I put here, The screws in the firewall are past the break in the concave area of the firewall. The screws in the 69 I posted are on the flat area of the firewall.
http://67-72chevytrucks.com/vboard/s...9&postcount=53 DeadheadNM's Blazer My 72 Cheyenne Super.
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other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless. |
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#16 |
Registered User
![]() Join Date: Feb 2015
Location: durham nc
Posts: 124
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Re: Ground strap locations
very helpful- thanks!!
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#17 |
Senior Member
![]() ![]() Join Date: Jan 2005
Location: CA
Posts: 5,504
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Re: Ground strap locations
My '68 2WD short bed came originally with a 2BBL V8 (VIN code E, 5/16" fuel line) and it does not have the typical two grounding screws behind the valve covers. Instead, it has a single screw hole closer to the center of the firewall. It looks like it is in a similar location to the inline 6 image from the original post. If I run a grounding strap from that hole to one of the valve covers, the grounding strap is going to have to be ridiculously long.
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#18 |
Senior Member
![]() Join Date: Jun 2005
Location: Winona Lake, IN
Posts: 6,283
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Re: Ground strap locations
Does anyone have a pic of the radiator support ground strap? I see in DeadheadNM's Blazer post that it's bolted to the core support behind the battery tray but the pic doesn't show where the other end attaches.
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70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear |
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#19 |
Registered User
Join Date: Apr 2005
Location: Cheyenne, WY
Posts: 742
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Re: Ground strap locations
I think the one behind the battery tray is part of the wiring harness for the passenger side headlight? Especially if the one you are referring to is the insulated wire?
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#20 |
Senior Member
![]() Join Date: Jun 2005
Location: Winona Lake, IN
Posts: 6,283
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Re: Ground strap locations
I think you are right. Do you know where the rad support ground connects at both ends? My truck never had one but I am not opposed to adding it.
__________________
70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear |
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#21 |
Registered User
Join Date: Apr 2005
Location: Cheyenne, WY
Posts: 742
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Re: Ground strap locations
I just removed the rad spt from an original truck (72). I did not see any dedicated grounds from the spt to the frame other than those insulated wires which do the opposite and ground to the rad spt.
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#22 |
Registered User
Join Date: Jan 2007
Location: Puyallup, WA
Posts: 1,662
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Re: Ground strap locations
On my current truck, and my previous truck, the ground wire on the rad support uses the same bolt as the headlight ground behind the battery box. The other end you're asking about connects to the small wire that comes off the neg battery cable.
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72 C10 lwb fleetside -stock 350/350 combo Last edited by 68 P.O.S.; 10-16-2020 at 10:32 AM. |
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#23 |
Senior Member
![]() Join Date: Jun 2005
Location: Winona Lake, IN
Posts: 6,283
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Re: Ground strap locations
Good to know I won’t worry about it then
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70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear |
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#24 |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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Well a friend of mine gave me about 50' of this grounding wire they used at the phone company. I grounded the 68 with it. I have the ramp truck done with it also. Neither one is Stock correct by no means but the lights and all the electric's work well.
On my 71 LS 6.0 swap I added a bunch of grounds with #10 wire to it just to make sure all the electronic's worked well. So far so good. ![]()
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 ![]() Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. Last edited by Andy4639; 10-16-2020 at 08:41 AM. |
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#25 | |
Registered User
Join Date: Jan 2007
Location: Puyallup, WA
Posts: 1,662
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Re: Ground strap locations
Quote:
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72 C10 lwb fleetside -stock 350/350 combo |
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