This means the gauge has power and is more than likely fine, but it does not have a signal from the sensor. Recheck and reinstall the sensor wiring.
Take the Gauge to the cars battery. Put Red and white on the positive terminal and Black on the Negative, if the gauge comes on, it’s working.
Send me a message from the Contact page and you will receive a response within 24 hours.
You can purchase a replacement under the “Gauge Accessories” category, located at the end of “gauges by type.”
All install guides are available for download in the “Install Support” section as a PDF.