Miata Mailing List: June 1999, Message #890

sponsored by

> Been there, done that.  The ECU is a perfect place, much
> better than the clutch switch.  There are two wires
> supplying power to the ECU, one is hot at all times and the
> other is switched.  You want to add a series switch to the
> already switched lead.  The constant power lead needs to
> stay just that as it provides the power to retain the memory
> settings.
> 
> The beauty of using the ECU is its low amperage draw.  You
> can use 18/20 gage wire and a very small switch which opens
> up many more possible hiding spots.  With power cut to the
> ECU, the engine will crank but not start.  In the '99, this
> also cuts power to the injectors.

Sounds like a good plan. I originally thought of it (putting the switch at
the ECU) because I have a J&S sensor installed and the wiring harness for
it, has a "plug" at the end, that you can plug in instaed of the sensor
unit. One of the wires there is a little loop looking for perfect such an
application. (Or course I would do it at the ecu and not there, that's
just what gave me the idea). Guess I'll go check my wiring diagrams.
Thanks!!

Tony Schreiber, Senior Partner                  Man and Machine, Limited
mailto:dune@technocraft.com                   http://www.technocraft.com

[ www.digitacamera.com | www.montero-sport.com | www.tsx.org/home.html ]
     digita_scripts          sport_utility          free_host_name