[DML] Re: Capacitors, and "Ground Bus"
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[DML] Re: Capacitors, and "Ground Bus"

DC current flows the other way -- from negative to positive. Ben Franklin got it backwards. (Feel free to look it up...).

Wild fluctuations in current, picked up in a DeLorean in such places as the dash volt gauge jumping with the turn signals, or the tachometer jumping when the windshield wipers activate, or the headlights changing intensity when the A/C compressor clutch engages, are caused by inadequate ground wiring. Every time a circuit is closed on a DeLorean, you get a surge of current not seen in metal bodied cars. That is why metal bodied cars don't need capacitors on every single electrical switch, but DeLoreans do. Every owner who has installed a ground bus has reported immediate improvement of current fluctuation as exampled above, with ho other changes to the electrical system whatsoever.

>From Marc Levy (Message #85580): "I was adding additional grounds to DeLoreans years before Bill came up with his brilliant 'ground bus'." And the difference between my bus and Marc's additional ground wires is.... Why in the world did Marc bother to run additional ground wires if they aren't necessary? 

My favorite example of inadequate DeLorean grounding: the fuel pump (via the inertia switch), the windshield wiper motor, the instrument cluster, the turn signals, and a few other goodies, all share *ONE* single 12 gauge ground wire to the rear bulkhead bolt. The fuel pump and the windshield wiper motor alone should each have a unique 12 gauge ground wire! Dave McKeen did an in depth analysis of this circuit on DMCTalk, and came to the same conclusion, ultimately regrounding his pump directly to the frame: http://dmctalk.org/showthread.php?1010-Fuel-pump-voltage 
Anyone care to argue that Dave is wrong too?

Bill Robertson

--- In dmcnews@xxxxxxxxxxxxxxx, "jtrealtywebspannet" <jtrealty@...> wrote:
> This is EXACTLY my point, you are talking about 2 separate things. The grounding system is meant to return the electrons back to the battery, completing the electrical circuit, after doing work. The capacitors are meant to direct "noise" (any A/C component in the DC electrical system) to ground and they also happen to be grounded so the noise gets back to the battery. There is a third "system", the bonding system where all of the body panels and frame are electrically connected together (bonded) so they will all be the same potential. This is necessary to drain off any possible voltage variations but is also important to create a ground plane for the antennae so you can have good reception. As usual Bill does not understand how this was meant to work so his solution is to just build his own system into it and thereby "improve" the car. Mark is correct, if you keep the original system clean it is adequate. The rub is on a 30 year old car stored outside you can expect some of the connections to have corroded. No one thinks of maintenance when it comes to electrical systems but you do have to do something to them occasionally.
> David Teitelbaum


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