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where is the comon ground?

 
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Matt Norton  



Joined: 14 Apr 2006
Posts: 196
Location: Montour Falls/Watkins Glen NY

PostPosted: Wed Mar 26, 2008 10:25 am    Post subject: where is the comon ground? Reply with quote

I have read about it but can't find it. I had my head under the dash down by the cluch looking behind the fuse box with a flash lihgt but about all I could see was a mess of wires going threw the wall and a leeky master cluch cylinder that I have been puting off. can some one direct me to a pic of what I am looking for?
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2Fast  



Joined: 09 Dec 2007
Posts: 459
Location: Klamath Falls, OR

PostPosted: Wed Mar 26, 2008 11:17 am    Post subject: Re: where is the comon ground? Reply with quote

The main ground is behind the fuse relay...the look like crowns. Im sorry, I cannot give you a picture... . If your on your back looking straigt up at the fuse box, scoot back a little and you should see two crown looking things attached to the body slightly below the wiper motor area. Hope this helps
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1979 Porsche 924 NA 5spd
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2Fast  



Joined: 09 Dec 2007
Posts: 459
Location: Klamath Falls, OR

PostPosted: Wed Mar 26, 2008 11:24 am    Post subject: Reply with quote

Alright, I decided to run outside and take a picture...

Here's where it is located...


Here's the close up of the ground (crown looking thing)

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Matt Norton  



Joined: 14 Apr 2006
Posts: 196
Location: Montour Falls/Watkins Glen NY

PostPosted: Wed Mar 26, 2008 11:33 am    Post subject: Reply with quote

dang !I don't know if I can get my head back that far. so it is up high?
is it easyer to see if I remove the fuse relay box. how do I go about regrounding everything.

Thanks for the pics makes it much easer to know what I am looking for!
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2Fast  



Joined: 09 Dec 2007
Posts: 459
Location: Klamath Falls, OR

PostPosted: Wed Mar 26, 2008 11:42 am    Post subject: Reply with quote

Matt Norton wrote:
dang !I don't know if I can get my head back that far. so it is up high?
is it easyer to see if I remove the fuse relay box. how do I go about regrounding everything.

Thanks for the pics makes it much easer to know what I am looking for!
Its not to hard to reach...It might help if you removed the fuse box. It shouldnt be to hard to do. Just take off one screw, and lift & pull. Iam not sure what you should do for regrounging. I would just clean the grounds up with sand paper. It will take some work, but it should come out well. Anybody want to give a second opinion?
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Matt Norton  



Joined: 14 Apr 2006
Posts: 196
Location: Montour Falls/Watkins Glen NY

PostPosted: Wed Mar 26, 2008 12:58 pm    Post subject: Reply with quote

I have been puting electrical grease such as used on spark plug wires on conections that I have been servicesing. It seams to help.

From what I had read before It souded like there were grounding screws to retighten. mayby I am thinking of the fuel level sender.
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mgatlag  



Joined: 02 Aug 2007
Posts: 647
Location: Avon, IN

PostPosted: Wed Mar 26, 2008 1:17 pm    Post subject: Reply with quote

I just got done doing mine on my 77.5 and it was too bad. Taking that screw out of the fuse box and lifting it off the mount and towards you a little will give you more room to work better, but you do have to get way down there to get to it.
IIRC my head was pretty much resting on the clutch pedal. I used a little stiff steel brush and removed each wire and cleaned up the ends one by one and cleaned the contacts on the ring and then used some vaseline on them before putting them back on. That seemed to do wonders for all my gauges. I'm getting ready to do it on my fuel sender contacts as well and hopefully get more of the same results. Have fun, you may need a beer to help your sore shoulder when you're done
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Michael
'77 1/2 924 N/A- 5 speed Audi box
'04 Ford Taurus - gone!!
'92 Jeep Cherokee Laredo - gone!!

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2Fast  



Joined: 09 Dec 2007
Posts: 459
Location: Klamath Falls, OR

PostPosted: Wed Mar 26, 2008 2:47 pm    Post subject: Reply with quote

mgatlag wrote:
I just got done doing mine on my 77.5 and it was too bad. Taking that screw out of the fuse box and lifting it off the mount and towards you a little will give you more room to work better, but you do have to get way down there to get to it.
IIRC my head was pretty much resting on the clutch pedal. I used a little stiff steel brush and removed each wire and cleaned up the ends one by one and cleaned the contacts on the ring and then used some vaseline on them before putting them back on. That seemed to do wonders for all my gauges. I'm getting ready to do it on my fuel sender contacts as well and hopefully get more of the same results. Have fun, you may need a beer to help your sore shoulder when you're done
Since you have already cleaned yours, how bad do you think mine look??? I plan on cleaning them, but are they terrible, or ok?
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Nobbi  



Joined: 24 Aug 2006
Posts: 1398
Location: Germany

PostPosted: Wed Mar 26, 2008 7:16 pm    Post subject: Reply with quote

Thanks for the pic 2fast,

i never touched this point of contact (poc!!) the last 20 years.....
I think i will take a look!

Nobbi
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mgatlag  



Joined: 02 Aug 2007
Posts: 647
Location: Avon, IN

PostPosted: Thu Mar 27, 2008 3:17 am    Post subject: Reply with quote

2fast, I would definitely clean your contacts. Getting rid of all the white corrosion will help more than you think. They don't look horrible but a good cleaning would help. Especially the ring on the right, you can see all the build-up right on the connections. If you come across any of them are a little loose, give them a little squeeze with some pliers to tightened them up. I would then put some vaseline or elect grease on them to help prevent this in the future. Have fun!
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'77 1/2 924 N/A- 5 speed Audi box
'04 Ford Taurus - gone!!
'92 Jeep Cherokee Laredo - gone!!

Porsche... better than tea with Miss McGill
(Slap Shot)
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2Fast  



Joined: 09 Dec 2007
Posts: 459
Location: Klamath Falls, OR

PostPosted: Thu Mar 27, 2008 7:43 am    Post subject: Reply with quote

Nobbi wrote:
Thanks for the pic 2fast,

i never touched this point of contact (poc!!) the last 20 years.....
I think i will take a look!

Nobbi
No problem Nobbi

mgatlag wrote:
2fast, I would definitely clean your contacts. Getting rid of all the white corrosion will help more than you think. They don't look horrible but a good cleaning would help. Especially the ring on the right, you can see all the build-up right on the connections. If you come across any of them are a little loose, give them a little squeeze with some pliers to tightened them up. I would then put some vaseline or elect grease on them to help prevent this in the future. Have fun!
Thanks for the info, I never would have thought about vaseline! I think I might even clean them today!
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1979 Porsche 924 NA 5spd
1979 Parts Porshce 924 NA 5spd
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