Lexx87

Hey, i have a 02 lexus es300. I previoulsy had the regular 6 disc cd changer without the mark levinson system...anywho i change the lexus headunit and put in a aftermarket headunit and i bypass the lexus amp...everything works perfect until i cut the blower motor speed to 2 or 3 notches on the climate control and the radio cuts in and out no matter what fuction it is on(bluetooth,wifi,cd,radio)...but if i cut it down to the first notch the radio is back playing like normal...pls help me figure this out

Oro

I have not modified the stereo in ours, but I will make some guesses.

It's probably coming through common power. The chips in the new unit might be susceptible to a resonance frequency of the motor at those frequencies.

If you did not directly ground the new unit to the chassis and just relied on the factory harness/adapter, make a direct, solid chassis ground. Make sure the old amp is fully out of the circuit and you do not have a ground loop with it or any other component.

if that doesn't work, then try a band pass filter on the new unit to eliminate motor "noise" in the power supply.

These are guesses; I'm not an expert in audio installation or wiring. Alternatively, just run it in "Auto" mode 24-7; I do and it works great, at least in my climate.

Lexx87

Thanks for your input...I will comment after I make the adjustments as you descrided