Fuel Level Sensor Testing
#1
Senior Member
Thread Starter
Fuel Level Sensor Testing
Need to identify a component not explicitly defined in the FM.
I'm rebuilding my 84 GSL-SE fuel level sensor. The component has a float and a barrel shaped sensor.
The FM shows the sensor and operating range (in ohms), but I am unable to find information on the barrel sensor.
I believe the barrel sensor is a 'low fuel' indicator and triggers the dash light.
A mech I spoke to said it is a 'temperature sensor'.
Does anyone have any information on the barrel sensor and it's operating range?
Fuel Level Sensor
Factory Manual Reference
I'm rebuilding my 84 GSL-SE fuel level sensor. The component has a float and a barrel shaped sensor.
The FM shows the sensor and operating range (in ohms), but I am unable to find information on the barrel sensor.
I believe the barrel sensor is a 'low fuel' indicator and triggers the dash light.
A mech I spoke to said it is a 'temperature sensor'.
Does anyone have any information on the barrel sensor and it's operating range?
Fuel Level Sensor
Factory Manual Reference
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diabolical1 (11-29-23)
#4
Out In the Barn
iTrader: (9)
Use a multimeter on ohms setting. Place once of the sending unit ground and the other on the fuel level and fuel low wires. I found the wire colors in the wiring diagram on the 1985 manual. You can do this before installing it. Move the sweep slowly and way for it to settle. Stop in the middle and on each end.
Fuel Gauge: Yellow wire - Empty: 103-117 Ohms, 1/2: 28.5-36.5 Ohms, Full: 1-5 Ohms
Fuel Level Low: Yellow/Blue full=6 ohms / 1/2=31.5 ohms / empty=80 ohms.
I've seen some conflicting values but have validated the Fuel Gauge ohms in the factory service manual just like you posted.
Fuel Gauge: Yellow wire - Empty: 103-117 Ohms, 1/2: 28.5-36.5 Ohms, Full: 1-5 Ohms
Fuel Level Low: Yellow/Blue full=6 ohms / 1/2=31.5 ohms / empty=80 ohms.
I've seen some conflicting values but have validated the Fuel Gauge ohms in the factory service manual just like you posted.
Last edited by KansasCityREPU; 11-28-23 at 09:21 PM.
The following users liked this post:
diabolical1 (11-29-23)
#5
Senior Member
Thread Starter
You don't reference 'how' to test the low fuel sensor, what medium should be used.
In this video (about 2/3rds of the way through) the guy just dips it in and out of a bowl of gas to test the low fuel sensor.
Does this make sense to you?
In this video (about 2/3rds of the way through) the guy just dips it in and out of a bowl of gas to test the low fuel sensor.
Does this make sense to you?
#6
Out In the Barn
iTrader: (9)
You don't reference 'how' to test the low fuel sensor, what medium should be used.
In this video (about 2/3rds of the way through) the guy just dips it in and out of a bowl of gas to test the low fuel sensor.
Does this make sense to you?
https://youtu.be/OriVruPOMCI
In this video (about 2/3rds of the way through) the guy just dips it in and out of a bowl of gas to test the low fuel sensor.
Does this make sense to you?
https://youtu.be/OriVruPOMCI
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