My oil temp guage and water temp guages arent working, although they have power to both. Is there a way to test whether its the guages or the sending unit that is bad or am I missing something else?
the gaues works with sensor and ground not works with power for messure
Ground the wire to the block and see if the gauge moves to the other end of the range. That's assuming they're a simple gauge with one sensor wire straight to the sensor, no control board etc. You might get better advice with a model number.
And depending on the machine an actual S/N might be even better!
How many wires to your sensors?
sorry about that guys, its a 97, 580L
The engine temp gauge should of course work as the engine warms up and grounding the sender wire should force full scale, if it does replace the sender, if you are watching the transmission temperature you may not see that move under any normal work unless you are loading the torque converter a good bit, Try putting it in high gear, forward shuttle, hold the brakes tightly and run the engine at full load for a minute or two, if the gauge starts up you will know it is good
For what it's worth, my water temp and oil temp gauges hardly move at all on my 590 SL. They do move, so I know they are working, but they usually only come up about 10-15% into the green. On the other hand, my fuel gauge moves too fast....
JB, your sender for the water temp may be out of spec or maybe the thermostat has failed, start the engine cold then feel the top radiator hose to see if it stays cool then opens with a rush of heat or gradually warms up like there is a constant flow of coolant indicating an open stat.
thank you, apparently my oil temp guage does work.