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Old 03-03-2019, 01:22 PM   #1
Dach
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Default Low washer fluid and it's not the sensor...

So my wife's '01 l200 is going away soon and I have the washer fluid warning to deal with first. I should have just checked the plug with a jumper, but I bought a new sensor and it didn't work. I ohmed it out and it and the original are good. I jumpered the plug and still have the warning. I know it goes through the BCM but that seems to be a stretch to think that's the problem since that is the only issue I'm having. I was wondering if anyone else has had this or if someone could show me wiring diagram so I can check for continuity at various points. I could just tear off the conduit and tape, but that may be my only/last resort. TIA.
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Old 03-03-2019, 02:48 PM   #2
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2003 L-Series 3.0L Sedan
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Default Re: Low washer fluid and it's not the sensor...

Did you get something like a Haynes and check the wiring diagrams to trace it?
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Old 03-03-2019, 07:58 PM   #3
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1997 SL1
Post Re: Low washer fluid and it's not the sensor...

This may help!!

1995 SL1 236,300 2005>2018
1997 SL1 71,400 21 yrs. and Legal!!
CHECK YOUR OIL!!
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File Type: jpg Washer Switch.jpg (142.3 KB, 19 views)
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Old 03-04-2019, 03:09 PM   #4
Dach
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Default Re: Low washer fluid and it's not the sensor...

Thanks, that will help.
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Old 03-04-2019, 10:25 PM   #5
Wayne G.
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2001 L-Series 3.0L Sedan
1997 SL2
Default Re: Low washer fluid and it's not the sensor...

I have the identical issue with my L300 - light stayed on after filling, replaced sensor , light still on, jumper - ed the plug to sensor light still on. Closed circuit should turn off alert lamp, open circuit - lamp on. No obvious breaks in wire. let us know how you fix it. Any suggestions?
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Old 03-05-2019, 04:59 PM   #6
Dach
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Default Re: Low washer fluid and it's not the sensor...

I jumpered a wire from ground to both sensor wires. The schematic helped me a lot with this. Touching the black white made the dash light go off so I knew I was missing the ground. I checked where the black was connected to the ground connections just under my battery tray. I had a battery leak about 15 yrs. ago and it must have finally eaten away the ONE wire that went to the sensor. I just ran a new ground to the remaining black wire and that did it. Thanks again to SRGW for the schematic.
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Old 03-05-2019, 09:17 PM   #7
Wayne G.
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2001 L-Series 3.0L Sedan
1997 SL2
Default Re: Low washer fluid and it's not the sensor...

Quote:
Originally Posted by Dach View Post
I jumpered a wire from ground to both sensor wires. The schematic helped me a lot with this. Touching the black white made the dash light go off so I knew I was missing the ground. I checked where the black was connected to the ground connections just under my battery tray. I had a battery leak about 15 yrs. ago and it must have finally eaten away the ONE wire that went to the sensor. I just ran a new ground to the remaining black wire and that did it. Thanks again to SRGW for the schematic.
Excellent, soon as it stops raining I will get mine in order thanks for the post.
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Old 03-05-2019, 09:47 PM   #8
Dach
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Default Re: Low washer fluid and it's not the sensor...

You're welcome. Let me/us know if you need any more help.
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Old 03-23-2019, 04:17 PM   #9
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2001 L-Series 3.0L Sedan
1997 SL2
Default Re: Low washer fluid and it's not the sensor... repair update

In mine thanks to to info from Dach, is fixed. There IS a grounding block just in front of the battery tray under the radiator fan control with probably 10/12 small black wires going to it and one large white wire. One of the small wires had been pull hard at some point and broken. Spliced in a 2" piece of wire - all working. This block also is the grounding point for the headlights as well.
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