L2850 (1993)/ battery fluid level sensor

[Henner]

Hello, I recently bought the tractor and found the battery acid level light on the dash permanently on (as ignition is on), while the sensor is off. I am not quite sure, if the sensor will fit a standard lead-acid battery ( exchanging one of the filler-plugs), as I contemplate to buy a new one (it is about 50€/$). Alternatively, I am going to try feeding the wire via a 1,2 (or 1.5 V lithium batt) Volt AA battery with the negative pole connected to the 12 V tractor battery. My idea is, that the AA battery simulates the 2 volts , the sensor would normally pick-up from the tractor-battery. Either way, I hope that I match the proper wire, which leads to the transistors, which switch bulb on and off in the dash. Taking off the bulb is my final remedy. I would appriciate any help on this topic. Heinz

 

[Dave_eng]

You are to be complemented for knowing exactly what that sensor and warning light are all about.

Often owners are puzzled by a warning light on the dash with no idea why.

The WSM indicates the sensor is looking for 2 volts to ground.

My suggestion, rather than batteries which will run down, is an adjustable DC to DC power supply for around $10.

With this device you can adjust the output voltage until you are keeping the dash light off.

Dave

 

[GeoHorn]

If it were mine.... I’d disconnect it and throw it away, because testing only a single cell in a battery isn’t a very good system-check at all, and it’s a simple matter to check all the battery cells monthly or semi-annually... whatever your curiosity level might be.

 

[Dave_eng]

If it were mine.... I’d disconnect it and throw it away, because testing only a single cell in a battery isn’t a very good system-check at all, and it’s a simple matter to check all the battery cells monthly or semi-annually... whatever your curiosity level might be.

I was exposed to this battery electrolyte level system on my 1982 Suzuki GS1100EZ. The battery was completely inaccessible so regular fluid checks were impractical.

My experience was that the cell with the level probe in it was the one to drop further/faster than the other 5. I felt the battery designers had chosen the cell 2 volts from the negative terminal for a reason based upon testing. I relied upon it to service the battery

AGM batteries seem to be so much better than batteries from the 1980's and have made the level probe unnecessary.

My experience only.... others may have had other experiences.

Dave

 

[North Idaho Wolfman]

Pull the bulb and be done with it.