Ground on RH-inner fender. 1970 C10 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Accelo · 04-17-2021, 02:09 AM

There is a ground on the right inner fender about in the middle, near the frame.
I have a picture of the ground attached to the fender. Wondering exactly where it should be attached to the frame and if its a bolt or self threading screw at the frame. It is a self threading screw with a star washer on the inner fender side of the ground. This is a 1970 C10 Truck.

**the67Beast** · 04-17-2021, 04:57 AM

I am not certain on your 70 model, but my 67 did not have this. My truck is all original as far as I know.

MAC71Cheyenne · 04-17-2021, 08:33 AM

My '71 has one. On it, the wire goes to a threaded bolt and nut on the outside frame rail. Just above the ball joint.

**pjmoreland** · 04-17-2021, 10:18 AM

This thread has some good info on grounding straps.

http://67-72chevytrucks.com/vboard/s...d.php?t=422234

Accelo · 04-17-2021, 06:05 PM

Thanks for the input.
I think I found the location described by Mac71....

As a side note:
I was helping a friend with his 68 Mustang fast back and the car was on a lift. We were chasing electrical gremlins and when he opened the door the starter engaged. The Mustang moved about one foot forward but didn't start.
Chased the issue to grounds that were not replaced during the rebuild. The dome light coming on activated the starter. Weird but still could have been a disaster.
So I always replace the grounds when I find them. Still unsure why GM thought to ground the inner fender but I am going on the premise GM didn't spend $ on grounds if they weren't required.
Thanks again everyone.
Rick

Peanut74 · 04-17-2021, 09:30 PM

Looks like you already have your answer.

But, on the '71 donor I took apart the right side inner fender well was grounded to the cab mount bracket. It used a self tapping bolt and star washer between the ground wire and body mount.

Accelo · 04-17-2021, 10:06 PM

Thanks
I will inspect the cab mount. May not be definitive on my truck as I replaced the complete floor.

Peanut74 · 04-18-2021, 09:03 AM

Accelo, the cab mount I am referring to is the one on the frame not the one on the cab. The ground was mounted on the backside of the frame cab mount. If you need a pic I could dig through mine and see if I can find one.

**70STOVEBOLT** · 04-18-2021, 10:54 AM

Quote:

Originally Posted by Peanut74

Accelo, the cab mount I am referring to is the one on the frame not the one on the cab. The ground was mounted on the backside of the frame cab mount. If you need a pic I could dig through mine and see if I can find one.

My truck has a ground strap in this location, but it is connected to the cab on the other end. It did not have a ground on the inner fender but I am adding one.

Peanut74 · 04-18-2021, 11:05 AM

My main ground path is the frame as I relocated the battery. So I work at getting all the grounding wires to connect to the frame. I went so far as to weld bolts to the frame by the battery and motor to make sure I have a good path.

**Getter-Done** · 04-18-2021, 12:56 PM

I was at a show in 2019.

I saw a very nice 72.

I took several pictures of the detailed restoration.

Here is 2 cab ground straps (RH/LH) that stood out.

Name: grd1.jpg
Views: 523
Size: 33.1 KB

.

Accelo · 04-18-2021, 04:49 PM

Because the location is difficult to determine from the picture I posted, I took another with an overall view to help clarify.
The white piece of rolled up paper has been inserted into the hole where the ground strap was located.
This is the Right Hand side. I have replaced the inner fenders and there wasn't a hole punched at this location on the aftermarket inner fender.
Rick

**70STOVEBOLT** · 04-18-2021, 05:36 PM

I have an NOS RH inner, I will try to remember to look tomorrow, it is at work.

**70STOVEBOLT** · 04-19-2021, 05:59 PM

NOS inner fender does not have hole or dimple.

**pjmoreland** · 04-19-2021, 06:24 PM

My original fender has a hole where I've circled in the image, and there was a hole nearby in the frame, so I installed a ground strap there.

Peanut74 · 04-19-2021, 07:15 PM

Accelo, here is a pick of where my donor truck had its ground wires. The one ground definitely does not look factory but did go to the right side inner fender. May have been added as there were some relays mounted on the inner fender well.

Accelo · 04-20-2021, 02:06 AM

The top picture has a ground that looks like mine. You also have what looks like a correct bolt with a star washer. I believe I will hook up mine just like yours. It looks stock to me. I will investigate my frame. If I have a threaded hole in the same location I think we have a winner. Thanks again.

Updated
It appears the ground I found was forward of the one shown in the picture.
It matched the thread of the screw I had perfectly. It's the hole I am going to use. the only reason I can think of that GM grounded the inner fender is so It acts as a ground plane for the radio antenna?

04-17-2021, 02:09 AM	#1
Accelo Registered User Join Date: Mar 2015 Location: washington Posts: 2,160	Ground on RH-inner fender. 1970 C10 There is a ground on the right inner fender about in the middle, near the frame. I have a picture of the ground attached to the fender. Wondering exactly where it should be attached to the frame and if its a bolt or self threading screw at the frame. It is a self threading screw with a star washer on the inner fender side of the ground. This is a 1970 C10 Truck. Attached Images

04-17-2021, 04:57 AM	#2
the67Beast Active Member Join Date: Feb 2017 Location: Chapin, SC Posts: 108	Re: Ground on RH-inner fender. 1970 C10 I am not certain on your 70 model, but my 67 did not have this. My truck is all original as far as I know. Attached Images

04-17-2021, 08:33 AM	#3
MAC71Cheyenne Registered User Join Date: Aug 2020 Location: Mount Pleasant Iowa Posts: 303	Re: Ground on RH-inner fender. 1970 C10 My '71 has one. On it, the wire goes to a threaded bolt and nut on the outside frame rail. Just above the ball joint.

04-17-2021, 10:18 AM	#4
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,321	Re: Ground on RH-inner fender. 1970 C10 This thread has some good info on grounding straps. http://67-72chevytrucks.com/vboard/s...d.php?t=422234

04-17-2021, 06:05 PM	#5
Accelo Registered User Join Date: Mar 2015 Location: washington Posts: 2,160	Re: Ground on RH-inner fender. 1970 C10 Thanks for the input. I think I found the location described by Mac71.... As a side note: I was helping a friend with his 68 Mustang fast back and the car was on a lift. We were chasing electrical gremlins and when he opened the door the starter engaged. The Mustang moved about one foot forward but didn't start. Chased the issue to grounds that were not replaced during the rebuild. The dome light coming on activated the starter. Weird but still could have been a disaster. So I always replace the grounds when I find them. Still unsure why GM thought to ground the inner fender but I am going on the premise GM didn't spend $ on grounds if they weren't required. Thanks again everyone. Rick

04-17-2021, 09:30 PM	#6
Peanut74 Registered User Join Date: May 2018 Location: Prattville, AL Posts: 590	Re: Ground on RH-inner fender. 1970 C10 Looks like you already have your answer. But, on the '71 donor I took apart the right side inner fender well was grounded to the cab mount bracket. It used a self tapping bolt and star washer between the ground wire and body mount. __________________ -------------------------------------------------------- 1967 C10 "Snowball" (Currently in a million pieces down from a bazillion) 1989 Toyota DLX pickup "The Hulk" 2012 Jeep JKU "Crush" 1976 Chevy short bed with a 327 and 3 on the tree (Sold it to buy the Blazer) 1971 Chevy Blazer (Sold it)

04-17-2021, 10:06 PM	#7
Accelo Registered User Join Date: Mar 2015 Location: washington Posts: 2,160	Re: Ground on RH-inner fender. 1970 C10 Thanks I will inspect the cab mount. May not be definitive on my truck as I replaced the complete floor.

04-18-2021, 09:03 AM	#8
Peanut74 Registered User Join Date: May 2018 Location: Prattville, AL Posts: 590	Re: Ground on RH-inner fender. 1970 C10 Accelo, the cab mount I am referring to is the one on the frame not the one on the cab. The ground was mounted on the backside of the frame cab mount. If you need a pic I could dig through mine and see if I can find one. __________________ -------------------------------------------------------- 1967 C10 "Snowball" (Currently in a million pieces down from a bazillion) 1989 Toyota DLX pickup "The Hulk" 2012 Jeep JKU "Crush" 1976 Chevy short bed with a 327 and 3 on the tree (Sold it to buy the Blazer) 1971 Chevy Blazer (Sold it)

04-18-2021, 11:05 AM	#10
Peanut74 Registered User Join Date: May 2018 Location: Prattville, AL Posts: 590	Re: Ground on RH-inner fender. 1970 C10 My main ground path is the frame as I relocated the battery. So I work at getting all the grounding wires to connect to the frame. I went so far as to weld bolts to the frame by the battery and motor to make sure I have a good path. __________________ -------------------------------------------------------- 1967 C10 "Snowball" (Currently in a million pieces down from a bazillion) 1989 Toyota DLX pickup "The Hulk" 2012 Jeep JKU "Crush" 1976 Chevy short bed with a 327 and 3 on the tree (Sold it to buy the Blazer) 1971 Chevy Blazer (Sold it)

04-18-2021, 12:56 PM	#11
Getter-Done Senior Member Join Date: Dec 2009 Location: TN. Posts: 7,724	Re: Ground on RH-inner fender. 1970 C10 I was at a show in 2019. I saw a very nice 72. I took several pictures of the detailed restoration. Here is 2 cab ground straps (RH/LH) that stood out. . __________________ ________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build

04-18-2021, 04:49 PM	#12
Accelo Registered User Join Date: Mar 2015 Location: washington Posts: 2,160	Re: Ground on RH-inner fender. 1970 C10 Because the location is difficult to determine from the picture I posted, I took another with an overall view to help clarify. The white piece of rolled up paper has been inserted into the hole where the ground strap was located. This is the Right Hand side. I have replaced the inner fenders and there wasn't a hole punched at this location on the aftermarket inner fender. Rick Attached Images

04-18-2021, 05:36 PM	#13
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,212	Re: Ground on RH-inner fender. 1970 C10 I have an NOS RH inner, I will try to remember to look tomorrow, it is at work. __________________ 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 Coming soon: EFI 2015 Silverado 1500 LS 4.3/6L80/3.23

04-19-2021, 05:59 PM	#14
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,212	Re: Ground on RH-inner fender. 1970 C10 NOS inner fender does not have hole or dimple. __________________ 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 Coming soon: EFI 2015 Silverado 1500 LS 4.3/6L80/3.23

04-19-2021, 06:24 PM	#15
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,321	Re: Ground on RH-inner fender. 1970 C10 My original fender has a hole where I've circled in the image, and there was a hole nearby in the frame, so I installed a ground strap there. Attached Images

04-19-2021, 07:15 PM	#16
Peanut74 Registered User Join Date: May 2018 Location: Prattville, AL Posts: 590	Re: Ground on RH-inner fender. 1970 C10 Accelo, here is a pick of where my donor truck had its ground wires. The one ground definitely does not look factory but did go to the right side inner fender. May have been added as there were some relays mounted on the inner fender well. Attached Images __________________ -------------------------------------------------------- 1967 C10 "Snowball" (Currently in a million pieces down from a bazillion) 1989 Toyota DLX pickup "The Hulk" 2012 Jeep JKU "Crush" 1976 Chevy short bed with a 327 and 3 on the tree (Sold it to buy the Blazer) 1971 Chevy Blazer (Sold it)



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04-20-2021, 02:06 AM	#17
Accelo Registered User Join Date: Mar 2015 Location: washington Posts: 2,160	Re: Ground on RH-inner fender. 1970 C10 The top picture has a ground that looks like mine. You also have what looks like a correct bolt with a star washer. I believe I will hook up mine just like yours. It looks stock to me. I will investigate my frame. If I have a threaded hole in the same location I think we have a winner. Thanks again. Updated It appears the ground I found was forward of the one shown in the picture. It matched the thread of the screw I had perfectly. It's the hole I am going to use. the only reason I can think of that GM grounded the inner fender is so It acts as a ground plane for the radio antenna? Attached Images Last edited by Accelo; 04-21-2021 at 12:45 AM.

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