The first place to start is to check the ignition 12 volt power feed at the fuel gauge to see that it is powered up. I Email them all the time hoping they will correct their ad and they don't, only 25% are grateful. It is vital that the sending unit is matched to the dash gauge. As with any electrical troubleshooting, it is best to check the fuse and all wiring connections are clean, tight and free of corrosion. Having a known good tach in the vehicle to compare it with is a real plus. The sending unit is merely completing the circuit for the dash gauge by grounding it to the chassis.
Some cars today have access panels to tank under rear seat. I don't believe there are any after-market units available - they are a dealer item. I will do the same. Symptoms of a bad or failing fuel gauge sender yourmechanic advice fuel gauge sender. Marine gauges wiring diagram nissansentraclub marine gauges wiring diagram gm fuel sending unit wiring diagram best of enchanting gauge info marine.
If gauge now reads Full, the wire to the sending unit is shorted to ground. If your vehicle has been changed to 12 volts from 6 volts, you must not hook up the fuel gauge directly to 12 volt power. At the bottom, resistance is zero or completely grounded and should indicate Empty on the dash gauge. Check to make sure that the proper 6 or 12 volt power is present at the ignition side of the dash gauge. Reproduction fuel sending units can register around 125Ω when the tank is full.
Also, getting at least a short piece of the factory pigtail on the back of it is nice to have but not a necessity. Run a separate ground wire to the chassis if necessary. Posted on Jan 15, 2009 Fuel pumps outside the gas tank have nothing to do with fuel gauge readings. I say this because the factory gauge has a unique type of ferrule and fitting on the back of the gauge that is good to save and reuse. Know the gauge cluster works otherwise it will cost a small fortune to fix it. Original sending units can often be repaired.
If you do not have original wiring pigtail then a. Dave is one of my on-line friends, and one of the, if not the, most knowledgeable person when it comes to tachometers for our trucks. . Ground for dash lights on the left 6. Before you go hunting, know this. At least I know about the numbering, because that really helps.
It may be turned sideways, upside-down or have an additional ground. Auto meter phantom wiring diagram wiring diagram auto meter phantom wiring diagram. This makes it tough to get an accurate fuel level reading. The most common gauge problems are either a bad ground at the tank, or a sender problem. Do you think we should merge your first post and my numbering so people are aware there may be a difference? At the gas tank, unplug the electrical connector and use a jumper wire to ground the gauge sender wire on the car side of connector not the tank side of connector. That being said, the gauge in your Chevy may look a little different with all of the terminals connected to it.
Full View Close Up Close Up Full View Close up Close up 76-77: Volt gauge, but mechanical oil pressure gauge. The big things to get from all of this are 1. If you can find the wire to this unit, you can ground it to see if the gauge now goes to full. Wiring Diagram: In this diagram, the sender units are wired in series one or both may be causing your problem. The fuel gauge circuit can be daunting just like other wiring issues. You will need to contact the manufacturer of the gauge before you proceed any further.
That will prove if its the fuel gauge sender. By Stephen Kassis The fuel gauge is one of the most important gauges in the instrument panel. Fuel gauge wiring diagram mins schematic diagram i have a toyota rav4 2000 my fuel gauge is not working it shows gm. When I wired up my custom gauges I cut the wires off that I was going to use with enough of a tail left over to identify where it came from on the harness plug, just in case I had to re-wire. Use a special fuel gauge resistor to protect the original 6 volt fuel gauge that will be running in a 12 volt system. Light below fuel level, left side - coolant temp warning 16.
Otherwise send the unit to a specialist or replace the unit. Although all 73-87 88-91 clusters look strikingly similar, there are many differences 73-75: Amp gauge instead of volt gauge. Also, all the years mentioned above do not follow suit on large trucks. Ford fuel gauge wiring wiring diagram 78 ford fuel gauge wiring diagram wiring diagram. You will get strange readings that obviously have nothing to do with the fuel circuit. The wafer board isolated the resistor from the gauge housing.
If the ground wire looks good, the problem most likely resides in the fuel tank float assembly, and may need to be replaced. You'll see the 8mm screws holding the units in place. Most 85 models do not have the feedback carburetors, all 86 models do. Big truck like C-60's and such tach dashes can be made to work in a pickup, but offer many of there own unique problems because of optional gauges that were available in them see above. I capped the unused wires and then taped around the plug so nothing could ground itself out. If changing from 6 volt to 12 volt, be sure to install a special fuel gauge resistor inline before hooking up to 12 volts.