Illumination wire for new Nav

[gtgt]

I've installed all the necessary wires except for the illumination wire for my navigation unit. I have a 2003 boxster with the MOST system. The illumination wire is not part of the porsche stock harness.

I tried to tap into the illumination wire on the side switches, but without success. The side switches have an (+) and an (-) wire connection (the right and left side, respectively while facing the back of the switch).

I spliced into the (+) wire without success.

Any suggestions?

[yipster]

I've installed all the necessary wires except for the illumination wire for my navigation unit.  I have a 2003 boxster with the MOST system.  The illumination wire is not part of the porsche stock harness.

I tried to tap into the illumination wire on the side switches, but without success.  The side switches have an (+) and an (-) wire connection (the right and left side, respectively while facing the back of the switch).

I spliced into the (+) wire without success.

Any suggestions?

<{POST_SNAPBACK}>

What kind of navi are you installing?

[Orient Express]

Is the radio a MOST bus radio? If so then you have to hook the car up to a PST, and let the rest of the car know that it has this new radio in it, then everything will be fine. If it is not a MOST radio, you may be SOL, as cabin equipment illumination is controlled via MOST. You may be able to get power off of one of the dash switches illumination lines however.

[gtgt]

The nav I'm installing is a eclipse avn2454. I'm keeping my cdr23 (MOST) radio. I'm just installing it as a navigation unit at this point.

The navigation is working, however, I'm having a difficult time getting the illumination wire hooked up.

I've spliced into the dash button illumination, however, the nav unit thinks it's night all the time (when connected to the positive wire) or the nav unit thinks it's night when the headlights are off, and day when the headlights are on -- which is reversed (when connected to the negative wire).

Any suggestions?