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"Earth" and Tonneau bar
Posted: Mon Jul 02, 2001 6:14 am
by Mark Stolzenburg
A couple of questions:
1. My wiring harness has no ground wires for the headlights, fog light and front side lights. Is ground (earth) achieved only through the mounting points or is there supposed to be ground wires? Any suggestions?
2. Does anybody have the source for the screws used to mount the tonneau bar on the back of the seat? I think they are wood (?) screws that have large flat, round heads (if that makes sense). Thanks,
Mark Stolzenburg
Re: "Earth" and Tonneau bar
Posted: Mon Jul 02, 2001 6:34 am
by Chip Old
On Mon, 2 Jul 2001, Mark Stolzenburg wrote:
> 1. My wiring harness has no ground wires for the headlights, fog light
> and front side lights. Is ground (earth) achieved only through the
> mounting points or is there supposed to be ground wires? Any
> suggestions?
The original harness didn't have ground wires, counting on the lamp mounts
to achieve ground connections. Paint, rust, and miscellaneous grunge do
bad things to that grounding path, so it's a good idea to add ground
wires to all lamps that don't already have them.
--
Chip Old 1948 M.G. TC TC6710 XPAG7430 NEMGTR #2271
Cub Hill, Maryland 1962 Triumph TR4 CT3154LO CT3479E
fold@bcpl.net
Re: "Earth" and Tonneau bar
Posted: Mon Jul 02, 2001 6:43 am
by Forstner, Peter
> 1. My wiring harness has no ground wires for the headlights, fog light and front side lights. Is ground
> (earth) achieved only through the mounting points or is there supposed to be ground wires? Any
> suggestions?
Nearly all cars in the world use the body for the GND return. The TC is no exception.
- Your wires connect the light bulb through the switch on the dashboard to -12V.
- The other side of the light bulb goes to the body (GND = 0V).
The only problem that could occur is: Bad electrical contact between the different metal parts (wings, chassis, etc.) due to corrosion or because of new painted parts.
Best regards
Peter Forstner - TC6325
"Earth" and Tonneau bar
Posted: Mon Jul 02, 2001 7:49 am
by Roger Muir
-------------------- Begin Forwarded Message --------------------
From: Roger Muir, 100115,3345
To: "Mark Stolzenburg", INTERNET:
stolzy40@peoplepc.com
Date: Mon, Jul 2, 2001 3:46:28 pm
RE: [mg-tabc] "Earth" and Tonneau bar
Message text written by "Mark Stolzenburg"
My wiring harness has no ground wires for the headlights, fog light and
front side lights.
Is ground (earth) achieved only through the mounting points or is there
supposed to be ground wires? Any suggestions?
MY VIEW IS:-
Earth everything in site. Run the wires all back to the same point and
thence back to the battery.
Others have already said, rust paint grease, gunge, will only go to make
sure that any of your electrical circuits don't work, usually when you most
want them too.
i.e. When it raining, cold , and dark at midnight in the middle of
nowhere!!
You run the risk of circuits finding a earth run through other circuits if
you dont. An example would be say all the lights working but in series
together, very dim.
The reason that they are not there are because of absolute cost cutting
when the cars were built, but then they were new, rust hadn't developed and
there were few electrical problems.
With care they could be fitted discretely.
Safety Fast again.. (Its your life!!)
Regards to all.
Roger Muir
-------------------- End Forwarded Message --------------------
Re: "Earth" and Tonneau bar
Posted: Mon Jul 02, 2001 2:08 pm
by KEN PORTER
Mark:
I ran a ground wire from each headlight socket through the headlamp bracket and connected the wire using a ring connector under the nut the holds the fender to the fender stay. It works just fine, no more dim headlights.
Ken TC 4147
Mark Stolzenburg wrote:
A couple of questions:1. My wiring harness has no ground wires for the headlights, fog light and front side lights. Is ground (earth) achieved only through the mounting points or is there supposed to be ground wires? Any suggestions?2. Does anybody have the source for the screws used to mount the tonneau bar on the back of the seat? I think they are wood (?) screws that have large flat, round heads (if that makes sense). Thanks,Mark Stolzenburg
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