[techhelpbb]

Originally Posted by Qbot2640

We have split the PWM going to our lift motor's relay...the cable now simultaneously controls the Spike, and thus the lift motor...and is input for the indicator LED apparatus through the Arduino.

The motor is still responding, though the Arduino is not receiving a sufficient voltage to activate the indicator action.

Try disconnecting the split and just driving the Arduino.
Make sure to check the voltages before you hook up just the Arduino.