I installed all of my gauges and wired everything brand new with all brand new wires and connections.
Here are the troubles Im having,
1. the temp gauge is reading off the chart all the time (high end). The first night I backed it into the water and cranked it, the temp seemed to work fine, now the gauge wont sweep or anything, it just reads high.
2. Oil pressure

when the key is on (not running) the pressure is off the chart (high) and when the motor is running the pressure drops to 0
3. I put 10 gallons of fuel in the tank and my fuel gauge is reading nothing.
Again, this is all brand new wire and I know there are no cuts or flaws as far as that goes. Brand new sending units (for all three gauges). And the wiring is simple as all get out, one wire on the switch side, one wire to the sending unit, and one wire for the back light. Im not so smart, but I think even I have got the wires figured out. At least all of the back lights work.
The tach and the volts appear to be working properly, and I wired them just the same as the others. All 3 of the sending units cant be bad can they?
Any suggestions guys?