diff --git a/ADC-Control.md b/ADC-Control.md
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--- a/ADC-Control.md
+++ b/ADC-Control.md
@@ -1,7 +1,7 @@
 # Wiring:
 * Use blue cable for steering and green cable for speed
 * Use 3.3v from programming port or a voltage regulator
-* If you don’t need steering, connect blue cable to ground, and set **STEERING_COEFFICIENT** to 0 in config.h
+* If you don’t need steering, also connect blue cable to your input, and set **STEERING_COEFFICIENT** to 0 in config.h, you will be able to use auto calibration
 * 100k Pull down resistors connected to ground are recommended to prevent issues when inputs are floating (wire is cut or disconnected)
 
 ⚠ don’t use red wire it delivers 15v