Quote:
Originally Posted by Acree
That's a very good guess, but incorrect. The Ill- side is switched between ground and high with the PWM controller. The Ill+ is constant high. Ill- definitely never floats. They have pull-down resistors internal with the ECU.
And the gauge cluster is definitely LEDs... trust me on this. Check out my avatar. The picture below is the stock speedometer.
-Acree
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Yeah I never said the PWM ground/signal floated, that was the old way Subaru controlled the analog dimming. I guess I didn't finish my sentence the PWM signal does switch between ground and high.
What do you suppose the roughly 4v signals are used for? Are those just regulated voltages for the cluster LEDs?