A Piller gauge Q
03-05-2009, 09:51 PM
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A Piller gauge Q When wiring the gauges in can you set it up so they only come on with the dash/ speedometer lights? Ive seen cars where the gauges will dim with the interior lights. Anyone know how to do this?
03-06-2009, 02:08 PM
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If you're using AutoMeter gauges, they require a switched power source (to run the gauge), a ground, the sensor wires, and a dash light power source (for the backlight). So, if you connect them the way the instructions indicate, they should operate the way you're describing. The easiest dash light source is right off the dimmer switch itself. I believe it's the green wire coming from that. Just splice the gauges into that, and the backlights will come on with your dash lights. 
03-07-2009, 05:26 PM
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I'm pretty sure that's correct. I tried mine (which are LED-lit), and they dim ever-so-slightly, but it's hardly noticable. The dash is barely lit, and the A-pillar gauges are at 85% light it seems.
I'm pretty sure that you need a pulse generator to get LEDs to truly dim. I'm pretty sure that's what's used for LED brake lights / running lights.
I'm pretty sure that you need a pulse generator to get LEDs to truly dim. I'm pretty sure that's what's used for LED brake lights / running lights.