my 06 prowler when i turn the key on the gauge just flickers. once started it still just flickers and ticks. the light comes on but the gauge never reads anything. i changed the battery and checked the fuses. the machine runs perfect but the whole time im riding the gauge never works. any ideas on what to check before I go and get a new gauge. it was like this since i bought it. been running it for like 3 months like this.