I have a problem with my gauges. The dess post was just replaced and previous owner said gauges were working. When i bought it it would not power up come to find out it was a bad relay. I can barely see the reading on the gauge but they are working. Is there anything other than them being bad that would cause this? New battery, fuses good. I didn't know if possibly any of the wiring that was messed with when he replaced dess post could cause this or if I'm just out of luck and have to buy a new display. Thanks