Darcy and Dave---For one thing the braided cable is difficult to keep
clean, with grime and electrolisis setting in, so many of us didn't
replace them with the same woven brass. Instead, the plastic coated ones
with the dual metal straps were used. One strap is connected to the
original bolt on the firewall, which gives a body ground,,and the other
strap to the engine backplate/bellhousing. By osmosis they all get
together, but with rubber mounts and paint in the path, sometimes the
(engine) ground isn't as good as it should be.
This "loss" can show up more readily on those cars that have a
voltmeter, and is evident when the VM doesn't show full charge when
accessories are on (and the engine is at road speed).
If you've upgraded your alternator, it can show full charge even at idle
speed, with accessories on.
The fix can be either using the original style braided cable with a
three point connection, or making a secondary ground path from somewhere
on the engine to a good body contact, like the firewall bolt.
Dick
Sender: 6pack-bounces+tr6taylor=webtv.net@autox.team
From: Darcy
Re: [6pack] Proper grounding
My understanding it that the battery should be grounded at the bell
housing but also to the firewall via a bolt that is on the firewall just
behind the accelerator pedal shaft. Looks like it should be a braided
cable with a metal clamp on the cable partway between the battery and
the bell housing. The firewall bolt goes through the clamp and into the
firewall. I plan on taking extra care to ensure there is no dirt or
paint between the clamp and firewall. I've heard someone say the path is
battery to bell housing back up to the firewall. Doesn't seems as
logical but that no indicator of how it would have been originally
engineered.
Darcy
-----Original Message-----
From: forzion@maine.rr.com [mailto:forzion@maine.rr.com
<mailto:forzion@maine.rr.com> ]
Sent: Monday, December 17, 2007 9:33 AM
To: Hunter, Darcy
Subject: Re: [6pack] Proper grounding
Darcy;
I'm a little lost on this. Of course, some have probably written back to
you off list so I haven't seen everything on this that you have. My
negative battery cable currently is grounded to a bolt on the tranny
housing. Where else would I need to ground my car?
Dave
'74-Six
_____________________________________________
From: Hunter, Darcy
Sent: Monday, December 17, 2007 9:16 AM
To: '6pack@autox.team.net'
Subject: Proper grounding
Appreciate all the help. Looks like that cable should be braided so I'll
get one from TRF, Not that it wouldn't be easy to strip a small piece of
insulation from the current wire, but would like to keep the original
look. Will let everyone know how it works out.
Darcy Hunter
'73 TR6
No. Easton, MA
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