Ground Loops (non aviation)

["Bruce Plecan" <nacelp@bright.net>]

On grounding:
GM seems to ground all the ecm stuff thru one point on the engine.
Somestimes on the heads, sometimes on the intake.  I would **ASSUME**, this
is to prevent ground loops?.  Is the reason cause of where the alternator is
grounded there, or the mass of the block to act a sort of a capacitor, or
what?.  Would there be a big difference in grounding things at the firewall,
and relying on the original ground strap, and battery cable to be the
grounds?.....
The reason I ask is that on some applications the grounds are really
impossible to get to.
Grumpy

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