Yes, all circuits are protected by a fuse.
You start by figuring out what's wrong with them, then proceed from there.
TO ADD FREON TO A PETERBILT YOU MUST FIRST GET SOME TRAINING ON THE A/C SYSTEM.THEN YOU HOOK PU YOUR A/C GAUGES (134A) SET,BLUE TO THE LOW SIDE AND RED TO THE HIGH SIDE.NOW TURN ON THE TRUCK , MAKE SURE THE A/C IS ON THEN GO BACK TO YOUR GAUGES AND OPEN THE VALVES .BUT ONLY AT THE FITTINGS NOT ON THE MANIFOLD.NOW YOU SHOULD HAVE A READING ON YOUR GAUGES. A GOOD READING IS ABOUT 35 P.S.I ON THE LOW SIDE AND NOT TO EXCEED 300 P.S.I ON THE HIGH SIDE, DON'T OVER CHARGE IT OR DAMAGE CAN BE DONE TO THE A/C SYSTEM. ----
Bad electrical connections.
The coldness
Mechanical drive for the speedometer only.
Could be the sending unit or a problem with the wiring if electrical.
On a 1990 Peterbilt, the low air buzzer is typically located on the instrument panel, near the air pressure gauges. It may also be integrated with the warning lights that indicate low air pressure in the brake system. If you're having trouble locating it, refer to the vehicle's manual or check the wiring behind the dashboard for the buzzer's connection.
If the gauges are not working and the motor will not start, it could indicate an issue with the vehicle's electrical system, such as a dead battery, blown fuses, or a faulty ignition switch. These problems can disrupt the power supply to both the gauges and the ignition system, preventing the engine from starting. Additionally, wiring issues or poor connections might also be contributing to the malfunction. A thorough inspection of the electrical components is necessary to diagnose and resolve the issue.
They are called gauges. Perhaps I don't understand the question. There is a fuel gauge, which tells you how much fuel you have, or an electrical gauge, or one that gauges speed. I guess depending on the gauge there is a different name. So your speed gauge is your speedometer. Your RPM gauge is the tachometer, and so on.
There is a electrical system controller (esc) that's where the cluster gets its info from for example battery voltage
Yes, there are typically fuses associated with the dashboard gauges in vehicles. These fuses protect the electrical circuits that power the gauges, ensuring they operate correctly. If a gauge is not functioning, checking the corresponding fuse is a good troubleshooting step. The location and specifications of these fuses can usually be found in the vehicle's owner's manual.
"Mechanical Strain gauges" do not have inductance. There are many types of strain gauge: Mechanical, photoelastic, electrical etc.... Are you wanting the inductance of an electrical strain gauge? if so which type?