Re: [Amc-list] F('ing)ailing parts 2

[Tom Jennings <tomj@xxxxxxx>]

On Wed, 7 Mar 2007, Keleigh Hardie wrote:

> One small nit:
>
> "An oil pressure switch closes the contacts as soon as the engine is
> started and the contacts stay closed until the engine is shut off."
>
> Most standard oil pressure switches are the other way around, I think.
> There is power to the light whenever the key is on. If there is no
> pressure, the switch is closed, grounding the light and turning it on.
> When you  start the engine the pressure opens the switch, removes the
> ground and turns the light off. Only if there is a relay or electronics
> involved do they work the other way around...

Ohmygawd -- you're totally correct. I'm totally wrong. So it's
not a substitution, it's just a crappy part!

* Brake switch is normally-open. Closes on pressure.

* Oil switch is normally-closed. Opens on pressure.

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