| Re: Lost left turn signal [message #371061 is a reply to message #371051] |
Sun, 12 February 2023 21:12   |
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RF_Burns
Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada
Karma:
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Senior Member |
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Hi Ken,
I was saying that a low current ground from something like a clearance light etc, could have a new ground installed to the body, while a high current ground like the main battery ground MUST goto the engine block. If the main battery ground was lost, then the engine block would be pulled up towards battery 12V+ when the starter was activated. The body and frame would also follow the engine block voltage and everything would brown-out.
There is an OEM ground wire from the battery terminal going to the aluminum plate and then a wire going to the dash, but from my observations these are mounted to the SMC so are separate from the body grounding, so high starter current cannot find its way to this ground.
My concern is for those who ground the battery negative to the chassis frame. All kinds of nasty things can happen when the starter current tries to find a return path.
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
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