If you are having trouble with your Whiz Bang Jr., in addition to the troubleshooting steps found in your manual, here are some additional troubleshooting steps you can take:

• The Whizbang Jr. is designed for low-side shunt measurement. Make certain the shunt is attached to battery-negative, not battery-positive.
• Using a multimeter, check the voltage at your AUX2 terminal. It should read between 12 and 16 volts.
• Do not use Loctite. Using loctite on the screws can prevent contact and therefore proper grounding.
• On the MidNite Solar CLASSIC Charge Controller, change the Whiz Bang setting to Manual. The Whiz Bang LED should light up if there is a proper connection.
• If the LED comes on, then 1) there may be a problem with your AUX2 terminal or 2) the charge controller may be misconfigured.
• If the LED does not come on, then 1) the Whiz Bang may be defective, 2) there may be a broken wire, or 3) the Whiz Bang to the shunt is not grounded correctly.