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GL1500SE Low fuel warning light

938 Views 7 Replies 4 Participants Last post by  Dancinbear, 
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HI FOLKS:
Owned Wing 8+yrs. Low fuel lightworked fine for about 3, thenstopped functioning. 1500 off road sinceJunefor maint.items.Wenton first ride yesterday. 95% of to-do listdone[and you find lots of small stuff that needs fixing, when you tear into things!]. Now, low fuel lighton all the time. Am assuming it'sfuel reserve sensor[37810-MN5-008]gone bad. Is thiscorrect? TTFN.....Old Tom in NH
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Dancinbear
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Hi Tom........ my low fuel sensor light was acting funky on my 1200. When I ran some sea foam thru the fuel the sensor straightened out. I think there must be some sort of plunger in the sensor that goes up and down with the fuel level. The sea foam must have cleaned/loosened it up so it operated correctly again. If the light is on all the time the plunger may be stuck in the down possition. Just a thought........
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The low fuel light on the GL1500 is controlled by a fuel sensor. There is a themistor in the fuel sensor, when fuel gets low and the temperature changes on the themister, that activates the low fuel light.

The low fuel light comes on when a ground is provided to the white/blue wire on the fuel pump plate (under the seat). When fuel gets to 1.1 gallons left in the tank, the therminstor is activated and provides that ground.

I would test the low fuel sensor first before just replacing it. There should be 0.9 - 1.3 k Ohms resistance between the white/blue wire terminal and ground.

Note: The themistor is located at the 1.1 gallon level of fuel in the tank.

There is no pin plunger or whatever involved with it.

I replaced the low fuel sensor on my '99 Wing.
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THANK YOU BOTH!
Wife/yours truly leaving shortly for first ride since May[YEE HAA!]. Plan to put Seafoam in tank anyway, to smooth idle. WILL check tank terminal w/multimeter tomorrow. Lookin' forward to that ride/picnic today! ['John Wayne just got his Horse back', LOL!]. TTFN.....Old Tom
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Ditto on the seafoam/flaky light situation, mine is fine now.
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Psst..............You guys are responding to the "low fuel sensors" for GL1200's.

Old Tom has a GL1500.........

My response is for a GL1500..........!

Apples to Apples.........not.........Apples to Oranges............!!
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TO DBHORER: THANKS....You were right on!
Zero ohms to ground!Swapped low fuel bulb with burned-out one[was in dash unit forother maint.]to eliminate annoying red light after dark. Have never putfaith in low fuel light since'05, when it started not coming on. Ran dry once.Low fuel light came on after I put gallon of fuel in and drove back to station Iborrowed gas can from]. Go figure! Sensor replacement added to winter maint. list.
TTFN.....Old Tom in NH
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Dancinbear
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I hate it when DBHORER is right all the time...........
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