How to fix a jack plate gauge kit that is not reading: First check the jack plate gauge kit power connections. If your gauge does nothing, check the power connections behind the gauge and the black and red wire that come from the sender assembly.
You may also check the wires around the sender assembly on the plate itself to make sure they are intact.
If the problem persists, you may need to replace the jack plate gauge kit.
If your unit is less than one year old, contact T-H Marine for a replacement. If your unit is more than one year old, we recommend going to your nearest boat dealership or contacting a retailer for replacement parts.