What can I do to check the fuel gauge and sender unit? Which fuse is it? Does it run thought the gauges fuse?
Check for 12 volts at the orange wire on the fuel gauge. If missing check instrument fuse and associated wiring. If present do the following checks:
1. Remove gauge. Ground Y/W wire of fuel gauge sender located at bottom of gauge. Turn ignition switch ON.
a. Fuel gauge must indicate FULL. If gauge indicated FULL, gauge is functioning correctly and go to step 2.
b. If gauge did not indicate FULL, proceed to step 3.
2. Set MULTI-METER to resistance scale to measure the resistance of the sending unit. Place one probe on Y/W and the other probe on a good ground.
a. If fuel tank is full, the reading should be 40 ohms. An empty tank should have a 240 ohm resistance. A half full tank will be pproximately 97-118 ohms.
b. If a very high resistance or infinity is indicated on the meter, the sender may be "open" or not grounded. Check that sender and fuel tank are grounded by placing one probe of Multi-Meter on sender ****** and the other probe on crankcase. Meter must indicate one ohm or less. Replace sender if one ohm or less was present. If a higher resistance is present, check for poor connection on ground wire.
SOURCE: 1999 ultra classic fuel gauge reads full all the
Why worry about the fuel gauge? Most are inaccurate any way, just to it the old fashion way with the trip odimitor.
SOURCE: fuel gauge not woking 2006 fi harley softtail standard
Check your fuses and for possible shorted or cut wiring.
SOURCE: I put in a fuel
I think you're correct in your assumption. It may read differently but is it accurate? That's the question. Since the sending unit is so difficult to get into the tank. sometimes the arm gets bent resulting in an erronous reading. You can try bending the arm but it may take several trys to get it as close as you'd like.
Good Luck
Steve
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