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1976 911
Join Date: Mar 2013
Posts: 16
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Location of ground straps
Could someone please tell me the locations for all the ground straps that one has to inspect when troubleshooting electrical issues. Pictures would be greatly appreciated.
My vehicle is a 1976 2.7. |
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07-16-2013, 07:00 PM
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Registered
Join Date: Apr 2010
Location: New Orleans, LA
Posts: 1,493
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dunno all of them. but there is one attached to the transaxle where the shift rod enters the interior and another hidden by the ignition box/fuel filter.
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1982 911SC, Mocal oil cooler, Bilsteins, Carrera tensioners, backdated heat, factory short shift, Seine gate shift, turbo tie rods, pop off. 2005 Mercedes-Benz C230 kompressor sport 6-speed (daily driver) |
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07-16-2013, 07:28 PM
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Registered
Join Date: Jul 2004
Location: Fairbanks, Alaska
Posts: 177
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I purchased the Bentley Service Manual for my '87 911 and it shows where all the ground conections are. If you think you can own and work on a 911 without one, good luck. Pelican sells it. I unfastened and refastened all the grounds and it is an excellent practice. In my case, a loose ground on the driver's side intake manifold was causing erratic performance. Good Luck!
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Peace & Thanks, der Mond '87 Carrera Coupe Venetian Blue Metallic |
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07-16-2013, 07:44 PM
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ROW '78 911 Targa
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It is unfortunate there is no Bently manual for middies..
The Bently for '78 to '83 is as close as you can get. That said, it does show all the ground points for the car. |
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07-16-2013, 07:50 PM
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1976 911
Join Date: Mar 2013
Posts: 16
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Thank you I will try to source a Bentleys manual.
I've read so many threads regarding electrical issues (that my car is experiencing) asking "have you checked the grounds?". It would be great to have pictures of the locations on the forums as a visual reference for newbies like me. I'll certainly contribute once I figure it out 
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07-16-2013, 07:55 PM
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1976 911
Join Date: Mar 2013
Posts: 16
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I have been sent these 2 pics from Bentley manual:
 
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07-17-2013, 06:56 PM
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1976 911
Join Date: Mar 2013
Posts: 16
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Are there any other grounds that also need to be checked?
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07-17-2013, 06:57 PM
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ROW '78 911 Targa
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Here ya go... From my Bentley... Your '76 should be very similar to my '78.
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Dennis Euro 1978 SC Targa, SSI's, Dansk 2/1, PMO ITBs, Electric A/C Need a New Wiring Harness? PM or e-mail me. Search for "harnesses" in the classifieds. |
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07-17-2013, 08:35 PM
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1976 911
Join Date: Mar 2013
Posts: 16
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Perfect, Thats what I was looking for!! Thank you!!
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07-21-2013, 04:27 PM
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Registered
Join Date: Feb 2006
Location: Ontario Canada
Posts: 2,948
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anyone have a pic of G5 ? im not sure if its inside the luggage area or under the car ??
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1976 Yamaha XS360 ( Beats Walkin') 1978 911 SC Targa ( Yamaha Support Vehicle ) 2006 Audi A4 2.0T (Porsche Support Vehicle ) 2014 Audi A4 2.0T Technik (Audi Support Vehicle) |
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05-09-2022, 09:04 AM
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ROW '78 911 Targa
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Luggage area by the hood strut. Usually buried by all the other harnesses going through that area.
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Dennis Euro 1978 SC Targa, SSI's, Dansk 2/1, PMO ITBs, Electric A/C Need a New Wiring Harness? PM or e-mail me. Search for "harnesses" in the classifieds. |
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05-09-2022, 09:41 AM
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ROW '78 911 Targa
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Pic, look at brown wires.
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Dennis Euro 1978 SC Targa, SSI's, Dansk 2/1, PMO ITBs, Electric A/C Need a New Wiring Harness? PM or e-mail me. Search for "harnesses" in the classifieds. |
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05-09-2022, 09:47 AM
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82 911 SC - Ancora Imparo
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G5 is a PITA. It is buried underneath all the other harnesses as has been mentioned. Getting all the other harnesses off isn't a huge deal, but it's a serious pain to get them all back on after they are cleaned up.
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Ethan 1982 911 SC - Wine Red Metallic Coupe |
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05-10-2022, 11:03 AM
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Registered
Join Date: Jun 2000
Location: bottom left corner of the world
Posts: 22,803
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When I got my SC 25 or 27 years ago there were some slightly weird electrical things going on. I cleaned and applied dielectric grease to all the earth/ground locations. I also added an extra ground from the engine to the chassis. It's been fine ever since.
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05-10-2022, 11:44 AM
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Get off my lawn!
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It is certainly good practice to keep the grounds clean and solid.
One can never have too good of a ground. More is always better for a ground connection. Bad grounds have caused endless problems.
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Glen 49 Year member of the Porsche Club of America 1985 911 Carrera; 2017 Macan 1986 El Camino with Fuel Injected 350 Crate Engine My Motto: I will never be too old to have a happy childhood! |
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05-10-2022, 12:36 PM
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There are also ground connections for the head lights, tail lights, engine lid, and oil level sender.
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Ed 1973.5 T |
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05-11-2022, 04:04 AM
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Registered
Join Date: Feb 2006
Location: Ontario Canada
Posts: 2,948
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thanks for the pics guys .. and you guys are right .. cant even see the thing with so much in the way ... i originally thought it was a stupid question but i see now its not, its hard to find and address. guess ill save it for next weekend.
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1976 Yamaha XS360 ( Beats Walkin') 1978 911 SC Targa ( Yamaha Support Vehicle ) 2006 Audi A4 2.0T (Porsche Support Vehicle ) 2014 Audi A4 2.0T Technik (Audi Support Vehicle) |
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05-11-2022, 04:26 AM
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82 911 SC - Ancora Imparo
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Dielectric grease is great, but of course it doesn't conduct electricity. For the grounds, after cleaning I started applying carbon conductive grease. Effectively there is probably no difference between the two, but it makes me feel better knowing that I am enhancing the ground connection. The downside is that the carbon conductive grease is black and can make a mess if you're not careful. It also has a bunch of chemicals that probably give you and everyone you know cancer immediately
 https://www.amazon.com/MG-Chemicals-Carbon-Conductive-Grease/dp/B00SMRNSR0
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Ethan 1982 911 SC - Wine Red Metallic Coupe |
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05-11-2022, 09:20 AM
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Registered
Join Date: Feb 2006
Location: Ontario Canada
Posts: 2,948
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dielectric grease is to be used to prevent arcing and reduce electrical noise induced by such , its also excellent for that rubber that resists in ignition systems like getting on over dist cap etc. and also good for any type of contact system that is rotating like a horn rotating contact like ours for example. Not sure i would use it on a ground but i guess it does prevent water getting in and rusting.
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1976 Yamaha XS360 ( Beats Walkin') 1978 911 SC Targa ( Yamaha Support Vehicle ) 2006 Audi A4 2.0T (Porsche Support Vehicle ) 2014 Audi A4 2.0T Technik (Audi Support Vehicle) |
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05-11-2022, 09:27 AM
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Registered
Join Date: Jun 2000
Location: bottom left corner of the world
Posts: 22,803
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The sole reason I used dielectric grease is to prevent surface corrosion. The tight physical contact of the nuts and bolts on terminals provides good electrical flow.
If I wanted to increase or enhance electrical conductivity I'd use something good like Stabilant 22. |
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05-11-2022, 11:06 AM
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Heinz
Carrera
The Other Woman
