 alternator, does it have a ground strap? |
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| tod914 |
 Aug 3 2004, 12:30 PM
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#1
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Advanced Member  Group: Members Posts: 3,755 Joined: 19-January 03 From: Lincoln Park, NJ Member No.: 170  |
75 2.0 Going to have the alt. harness replaced. I was wondering if the Alt has a ground strap just so I know ahead of time to order the part. The pet cd showed one, but I never seen it mentioned in a thread.
Thanks, Tod |
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| plas76targa |
Aug 3 2004, 01:30 PM
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Senior Member Group: Members Posts: 885 Joined: 22-February 04 From: Frederick, MD Member No.: 1,700 Region Association: MidAtlantic Region |
I just replaced my Alt wiring harness on my 73 1.7 ltr and it (alt) didn't have a ground strap. According to the DD artical on the bird site, the ground is the brown or D- wire.
Whether you replace the harness yourself or have a shop do it, be sure to reinstall the backing plate on the Alternator. Search here on "alternator" one of the thread refers to the backing plate. Also, check the tech articles on bird board, they're very helpful. Good luck! |
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| lapuwali |
Aug 3 2004, 01:30 PM
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Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743  |
Alternators ground through their mount to the engine, and the engine grounds through a strap to the body. On the 914, the strap is on the rear of the gearbox.
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| tod914 |
Aug 3 2004, 06:32 PM
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#4
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Advanced Member Group: Members Posts: 3,755 Joined: 19-January 03 From: Lincoln Park, NJ Member No.: 170 |
Ok great, thanks guys. When I seen the strap listed, I wasn't sure. Wish I could just plug in the new harness without going through all BS in removing tin, etc.
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| davep |
Aug 3 2004, 07:43 PM
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#5
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914 Historian Group: Benefactors Posts: 5,137 Joined: 13-October 03 From: Burford, ON, N0E 1A0 Member No.: 1,244 Region Association: Canada |
James is correct that the alternator grounds through the mount. That said, in many cases the mounting points often need to be cleaned. Quite often there is significant corrosion of the fan housing, and that can cause a voltage drop on the ground side of the circuit. One good check is to put the alternator under a heavy load (fans running, headlights on, etc) and measure the voltage difference between the alternator body and the battery ground terminal.
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