AIM/Ground Location Help
Thread Starter
Burning Brakes
Joined: Aug 2011
Posts: 983
Likes: 35
From: Redding California
AIM/Ground Location Help
Good morning everyone. I'm going to install the grounding kit on my 68 and I want to make sure I put them everywhere they need to be. It's been a while since I've posted so I just want to remind some that I got this project completely disassembled in boxes... so I've never had the pleasure of seeing it together
. With that said, I also flipped through the AIM last night looking for a page with the ground locations on it, couldn't find anything. That's not saying it's not there, I just didn't see it. Can someone direct me to the right place in the AIM or just tell me please. Thanks in advance. Jason
. With that said, I also flipped through the AIM last night looking for a page with the ground locations on it, couldn't find anything. That's not saying it's not there, I just didn't see it. Can someone direct me to the right place in the AIM or just tell me please. Thanks in advance. Jason
Safety Car
Joined: Oct 2007
Posts: 3,729
Likes: 267
From: Austin Texas
Corvette of the Year Winner 2017
2016 C3 of Year Finalist
1 negative cable battery - frame.
2 negative cable from frame to engine block.
3 negative ground braid from frame - bird cage, located under left foot.
4 interior all grounds common point - left of headlight switch to birdcage.
5 all interior components also must have gnd. like speed-o and tach, headlight switch, wiper switch console gnd.
6 headlight support - core support.
7 core support - frame.
8 rear harness gnd- to frame.
these are the major must have gnd. cables
2 negative cable from frame to engine block.
3 negative ground braid from frame - bird cage, located under left foot.
4 interior all grounds common point - left of headlight switch to birdcage.
5 all interior components also must have gnd. like speed-o and tach, headlight switch, wiper switch console gnd.
6 headlight support - core support.
7 core support - frame.
8 rear harness gnd- to frame.
these are the major must have gnd. cables
Last edited by 69Vett; Feb 22, 2018 at 12:01 PM.
Team Owner
Joined: Sep 2006
Posts: 31,170
Likes: 4,248
From: Westminster Maryland
Hi 13,
69V did a NICE job listing the ground locations.
To find them in the AIM you need to look at the sheets for:
the Forward Lighting Harness
the Engine Harness
the Dash Harness
the Rear Lighting Harness
the Radio Installation in the Option Section of the AIM
As you can see the info is quite spread out.
Good Luck!
Regards,
Alan
69V did a NICE job listing the ground locations.
To find them in the AIM you need to look at the sheets for:
the Forward Lighting Harness
the Engine Harness
the Dash Harness
the Rear Lighting Harness
the Radio Installation in the Option Section of the AIM
As you can see the info is quite spread out.
Good Luck!
Regards,
Alan
Safety Car
Joined: Oct 2007
Posts: 3,729
Likes: 267
From: Austin Texas
Corvette of the Year Winner 2017
2016 C3 of Year Finalist
you are referring to the "wiper ground" black wire large lug by itself,
and it gets bolted to the bellhousing, Not on the starter lugs.
forgot that one.
and it gets bolted to the bellhousing, Not on the starter lugs.
forgot that one.
Last edited by 69Vett; Feb 22, 2018 at 04:34 PM.
Burning Brakes
Joined: Jun 2014
Posts: 924
Likes: 467
From: Brentwood CA
Thanks,
-Doug
Safety Car
Joined: Oct 2007
Posts: 3,729
Likes: 267
From: Austin Texas
Corvette of the Year Winner 2017
2016 C3 of Year Finalist
in your diagram cable 3, is called out in my list as item #2
there is a wiper gnd not shown, and it gets bolted to bell housing,
this Black wire frequently gets accidentally connected to +12 at starter, by uninformed mechanics.
because it looks like it should go there, because it has a large ring lug.. wish makes bad smoke for you.
there is a wiper gnd not shown, and it gets bolted to bell housing,
this Black wire frequently gets accidentally connected to +12 at starter, by uninformed mechanics.
because it looks like it should go there, because it has a large ring lug.. wish makes bad smoke for you.
Last edited by 69Vett; Feb 23, 2018 at 11:38 AM.
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Burning Brakes
Joined: Jun 2014
Posts: 924
Likes: 467
From: Brentwood CA
Thanks. Is the wiper ground built in to the harness or is it a separate wire?
Understood. Many things run on smoke and, if you let the smoke out, they stop working.
Understood. Many things run on smoke and, if you let the smoke out, they stop working.
Burning Brakes
Joined: Feb 2008
Posts: 1,042
Likes: 19
From: Oswego New York
More Grounds
My '70 has braided wire grounds connecting the exhaust pipe u-bolt clamps to the frame (1 ground at each exhaust line). These are located just forward of the crossmember that is sleeved for the exhaust pipes to pass through (IIRC).
I haven't found them in my AIM yet (still looking), and I don't know which years this configuration applies. Perhaps others will chime in.
I haven't found them in my AIM yet (still looking), and I don't know which years this configuration applies. Perhaps others will chime in.
Burning Brakes
Joined: Sep 2005
Posts: 769
Likes: 36
From: Goose Creek SC
I recall having great difficulty locating the spot for #6 (above), headlight to core support. Me and a buddy looked forever using mirrors and everything we could think of. I am going to have to recheck because that was quite a while ago we were working on that then moved on to other areas, but I don't think we ever found the hole for the ground screw. Now that 69V has done such a good job of laying them out I think I will go down the list and check them off. Nothing more critical than good grounds on these things.
Team Owner
Joined: Sep 2006
Posts: 31,170
Likes: 4,248
From: Westminster Maryland
Hi 70Y,
1970 cars that were equipped with the optional radio had the 2 braided copper ground straps that run from the exhaust clamps to the transmission crossmember.
Regards,
Alan
1970 cars that were equipped with the optional radio had the 2 braided copper ground straps that run from the exhaust clamps to the transmission crossmember.
Regards,
Alan
Le Mans Master
Joined: Nov 2016
Posts: 9,225
Likes: 943
From: Lake Tahoe, CA
Good morning everyone. I'm going to install the grounding kit on my 68 and I want to make sure I put them everywhere they need to be. It's been a while since I've posted so I just want to remind some that I got this project completely disassembled in boxes... so I've never had the pleasure of seeing it together. With that said, I also flipped through the AIM last night looking for a page with the ground locations on it, couldn't find anything. That's not saying it's not there, I just didn't see it. Can someone direct me to the right place in the AIM or just tell me please. Thanks in advance. Jason
. With that said, I also flipped through the AIM last night looking for a page with the ground locations on it, couldn't find anything. That's not saying it's not there, I just didn't see it. Can someone direct me to the right place in the AIM or just tell me please. Thanks in advance. Jason
Right Motor Mount/Block
BirdCage to Frame #1 Left
Trans to Exhaust
Antenna
Taillights and maybe gas tank ( ? )
Battery to Frame
Driver/Left side front door jamb
Same
Believe there is a ground screw on the left side of this cross bar mount
Notice the strap on the drivers side #1 mount is bolted with a small clip on the end that is attached to the birdcage end channel at the #1 mount after the body is remounted.
Odd looking #1 Left Side Frame to body strap/ See frame photo Left side
Last edited by caskiguy; Feb 24, 2018 at 02:36 PM. Reason: Add content
Team Owner
Joined: Sep 2006
Posts: 31,170
Likes: 4,248
From: Westminster Maryland
Hi CG,
Very nicely done!
Perhaps explain to the folks where the ground strap that runs from the screw hole shown in the second photo connects... and how.....an odd one!
Also, the frame rail hole for the antenna ground is used for one of the rear lighting harness grounds too.
Regards,
Alan
Very nicely done!
Perhaps explain to the folks where the ground strap that runs from the screw hole shown in the second photo connects... and how.....an odd one!
Also, the frame rail hole for the antenna ground is used for one of the rear lighting harness grounds too.
Regards,
Alan
