Late Griffith 500 Earth points...
Discussion
Hi all,
Looking to trace an earth fault which is bothering the instruments in the dash...
I've run a separate earth from the "bunch" in the dash wiring loom direct to the battery, which has gone some way to solving the problem, but not solved it completely. So now I intend working around as many of the earth points as I can...
These are the ones I know of...
2 earth points under the front end of the whale tail, in the vicinity of the door release handles.
1 under the drivers side wheel arch (goes from engine to chassis IIRC)..
1 behind the petrol tank where the body is bolted to the chassis.. (can anyone confirm which side bolt this is?)
1 behind the radiator grill where the body bolts to the chassis.. (again can anyone specify which side bolt is used?)
Are there anymore? Any more engine to chassis links? my old wedge had one underneath at the side of the gearbox.
Regards,
Brian and a Green Griffith 500
Looking to trace an earth fault which is bothering the instruments in the dash...
I've run a separate earth from the "bunch" in the dash wiring loom direct to the battery, which has gone some way to solving the problem, but not solved it completely. So now I intend working around as many of the earth points as I can...
These are the ones I know of...
2 earth points under the front end of the whale tail, in the vicinity of the door release handles.
1 under the drivers side wheel arch (goes from engine to chassis IIRC)..
1 behind the petrol tank where the body is bolted to the chassis.. (can anyone confirm which side bolt this is?)
1 behind the radiator grill where the body bolts to the chassis.. (again can anyone specify which side bolt is used?)
Are there anymore? Any more engine to chassis links? my old wedge had one underneath at the side of the gearbox.
Regards,
Brian and a Green Griffith 500
Thanks for all the replies boys...
Update on progress...
Swapped out link under drivers wheel arch, this didn't change anything...
Started work and removed whale tail..
Drivers side bolt, cleaned up nice and shiny, cleared the threads out in the chassis with a tap.. new bolt... this shows slight improvement..
Passenger side bolt, can't get it out while dash in in...
Measured up and obtained a replacement main battery earth (which connects to the bolt you cant extract) long enough to reach to the drivers side bolt... Installed that... Result... struggled to see the resistance on meter now and no change when ignition turned on..
1 thing left to do, using the "old" main battery lead, provide a link between the two dashboard bolts...
Conclusion...
When I went to have the new lead made up I asked what size of cable to use.. Specialist Auto Electrical opinion, 25 mm2 or 35 mm2 cable... (went for 35 mm2) TVR had used 16 mm2...
I wonder if this has anything to do with the "hot start" issues that have prompted a variety of "fixes", should we now add, "upgrade the main battery earth" as another one of them...
Regards,
Brian and a Green Griffith 500
Update on progress...
Swapped out link under drivers wheel arch, this didn't change anything...
Started work and removed whale tail..
Drivers side bolt, cleaned up nice and shiny, cleared the threads out in the chassis with a tap.. new bolt... this shows slight improvement..
Passenger side bolt, can't get it out while dash in in...
Measured up and obtained a replacement main battery earth (which connects to the bolt you cant extract) long enough to reach to the drivers side bolt... Installed that... Result... struggled to see the resistance on meter now and no change when ignition turned on..
1 thing left to do, using the "old" main battery lead, provide a link between the two dashboard bolts...
Conclusion...
When I went to have the new lead made up I asked what size of cable to use.. Specialist Auto Electrical opinion, 25 mm2 or 35 mm2 cable... (went for 35 mm2) TVR had used 16 mm2...
I wonder if this has anything to do with the "hot start" issues that have prompted a variety of "fixes", should we now add, "upgrade the main battery earth" as another one of them...
Regards,
Brian and a Green Griffith 500
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