fuel gauge
- Thread starter ron4213!
- Start date
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If you have answers, please help by responding to the unanswered posts.
Seon
Well-known member
Check the ground connection wire at the tank and at the gauge.
Ex-Calif
Well-known member
A standard sender should ground through the unit. At full there should be least resistance. No ground would read empty.
First check is to remove the wire at the sender - the gauge should read zero (key on). If you ground the wire directly it should then read full.
Second check is to read 12V from end of sender wire to ground.
If the gauge doesn't go to zero with wire pulled it is a probable gauge failure or needle is stuck/fouled in the gauge. If the gauge does go to zero it is a faulty sender in the tank.
A mechanical sender is likely a coil of wire with a wiper. The higher the float goes in the tank the fewer coils the current passes through (less resistance) and the higher flow through the indicator. A short in the coils can occur such that at low levels the effect of the coil is negated by the short.
On the gauge side it is rare but possible to get a needle stick.
First check is to remove the wire at the sender - the gauge should read zero (key on). If you ground the wire directly it should then read full.
Second check is to read 12V from end of sender wire to ground.
If the gauge doesn't go to zero with wire pulled it is a probable gauge failure or needle is stuck/fouled in the gauge. If the gauge does go to zero it is a faulty sender in the tank.
A mechanical sender is likely a coil of wire with a wiper. The higher the float goes in the tank the fewer coils the current passes through (less resistance) and the higher flow through the indicator. A short in the coils can occur such that at low levels the effect of the coil is negated by the short.
On the gauge side it is rare but possible to get a needle stick.
Seon
Well-known member
ron4213! said:
Well the sender is normally located on top of the tank so if you don't have access, then yes.
