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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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