The buzzer is only used for the high rpm pressure switch. The low
pressure switch just triggers a blinking led. The high switch triggers
both. I'm sure this is done so there is no alarm sounding when you have
the key on but engine not running. The alarm is loud enough to be heard
over all the other sounds while driving so it would be too loud with the
engine not running.

Mark

Rocket J Squirrel wrote:
> Well, I wasn't trying to get all fancy like that. This being an 84
> model, and if the wiring diagram on 97.56 isn't lying, then just wiring
> a buzzer in parallel with the idiot lamp should give an audible alarm
> whenever the oil pressure lamp lights.
>
> There's only a single wire running from the op switch to the dash light,
> according to the diagram, so it can't be any fancier than that.
>
> Unless the wiring diagram is inaccurate, of course.
>