preserve solenoid values to avoid moving them when not desired
diff --git a/aos/prime/output/motor_output.cc b/aos/prime/output/motor_output.cc
index a532183..59c8ff9 100644
--- a/aos/prime/output/motor_output.cc
+++ b/aos/prime/output/motor_output.cc
@@ -50,7 +50,6 @@
     values_.pressure_switch_channel = 0;
     values_.compressor_channel = 0;
     values_.solenoid_module = -1;
-    values_.solenoid_values = 0;
 
     RunIteration();