Referring now to the printed circuit on the back of the cluster, even light oxidation of the copper foil wherever there is a mechanical connection (like at the harness plug or the steel spring clips at the back of the gauges) can cause connection problems.
The black ground wire may be attached to the cab sheetmetal by a screw, a spade terminal, or a u-clip in any case make sure there is a good connection to clean bare metal. If the pink ignition wire(s) aren't energized with the key ON, your gauges won't work. If necessary, you can probe the harness cluster plug for power and ground. GM uses pink w/ black stripe wiring for ignition and solid black wiring for ground in the dash harness. If you still have issues with your gauges after checking the above, with the ignition switch turned ON, check both sides of your fuses using a test light. Otherwise, take it to a garage in the knowledge that you have saved on the expense of having them track down the problem for you.Birddog, sounds like you either lost ignition or ground to the cluster. Trace wiring all the way from the fuel tank via the fuel pump to the. You should be able to find this in the service manual. There’s no quick way to check this, and you’ll need to trace the wiring using the appropriate diagram for your vehicle. If you feel comfortable with this task, go ahead and carry out the repair. One common reason for a fuel gauge not working in a truck is that the wiring has become corroded. When this happens, you’ll need to replace the entire fuel gauge. The only way you’ll know for sure is when you’ve eliminated the other possibilities. It’s possible that the fuel gauge itself has become faulty. However, if you get a reading of between 96 to 98 Ohms, you will know the sending unit has a problem and will need to be replaced the 96 to 98 Ohms reading is that of an empty fuel tank.
SIMAIRPORT FUEL TRUCK NOT WORKING FULL
With a full tank, it should read between 9 and 10 Ohms. To carry out the test, put the meter’s red probe on the center post of the sending unit and the black probe to each of the other posts and check the reading. When you’ve done this, take a multimeter and set it to the 0 to 100 Ohms range. It will give you a benchmark to work from. Go ahead and fill the tank completely rather than trying to guess the level. Start by testing the fuel gauge to see if the resistance is normal. In order to test this, you’ll need to use a multimeter.
The problem could also be in the sending unit. You can try putting Vaseline on all the connections if you’re not sure how good they are. Trace wiring all the way from the fuel tank via the fuel pump to the fuel gauge on the dashboard. One common reason for a fuel gauge not working in a truck is that the wiring has become corroded. The chances are that the voltage limiter will be at fault, and by fixing it, the problem with both gauges will be resolved.
SIMAIRPORT FUEL TRUCK NOT WORKING MANUAL
The location of this component in your truck will vary depending on the make and model, so check your truck’s service manual first. If the fuse is fine, you will need to look at the voltage limiter. After that, the fuel gauge should work without a problem. To fix the problem, you only need to fit a new fuse. If the fuse for the fuel gauge have stopped working, your fuel gauge could be erratic and performing strangely. If the temperature and the fuel gauge aren't working, the first thing to check are the fuses. Read on for some common problems and solutions that could help fix your truck.
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