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#76 |
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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#77 |
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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#78 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,386
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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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#79 |
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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#80 |
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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#81 |
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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#82 |
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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#83 |
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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#84 |
Senior Member
![]() Join Date: Dec 2009
Location: TN.
Posts: 8,119
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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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#85 |
Who Changed This?
![]() Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,426
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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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#86 |
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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#87 |
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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#88 | |
Who Changed This?
![]() Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,426
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Re: Ground strap locations
Quote:
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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#89 |
Registered User
![]() Join Date: Mar 2005
Location: Jurupa Valley, Ca
Posts: 1,210
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Re: Ground strap locations
Strange timing. Earlier to day I finally installed ground straps that go from the firewall to the back of the engine both sides. I wasn't having any issues, but I figured if the factory put them their I should probably do so also. I haven't noticed any differences, but feel good about doing it. Then I sit down with a beer and see this thread at the top of messages. Strange. How's that song go, I feel like someone's watching me...
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Terry 1970 Custom Camper/C20 , GM Crate 350/7004R, Dana 60, factory AC |
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#90 |
Senior Member
![]() ![]() Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 9,815
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Re: Ground strap locations
While we are on the subject, yesterday I was looking at something under the hood of this Flint built, big block 69 C10 and noticed the location of the ground straps on the firewall. The drivers side strap is missing, but the screw is still there.
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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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#91 |
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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#92 | |
Registered User
Join Date: Mar 2019
Location: San Ramon, CA
Posts: 227
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Re: Ground strap locations
Quote:
Is the actually radiator grounded with a ground strap of the rad support grounded? |
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#93 |
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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#94 |
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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#95 |
Senior Member
![]() ![]() Join Date: Jan 2005
Location: CA
Posts: 5,492
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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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#96 |
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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#97 |
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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#98 |
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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#99 |
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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#100 |
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
__________________
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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