intermittent low coolant light

[flewbyu]

Just took delivery of 1984 M1009 with 57000 on clock. Seems to be in good shape with little rust. Will post pictures when camera is charged...Trouble is I have an intermittent low coolant light. Rad is full, as is overflow tank. Heater works great, and no temp light ever. How do I troublshoot/replace sending unit. Searched TM with no results...Thanks for any help!

 

[Dabba]

low cooland or low oil? i know im my m1008 has that low oil light... im probably missing it

 

[m16ty]

My brother has a m1008 and I don't think they have a low coolant or low oil light. They do have a high temp and low oil pressure light but that has nothing to do with the fluid levels. Well, I guess it indirectly does but that's not their purpose.

 

[m4A1]

The low coolant light is on the speedometer. I believe the sender unit is on the radiator tanks but I can't remember which side. Just look for wires on the radiator tanks.

 

[m16ty]

The low coolant light is on the speedometer. I believe the sender unit is on the radiator tanks but I can't remember which side. Just look for wires on the radiator tanks.

Ok, I didn't know it was there. The bulb must be shot on my brother's because I've never seen it light up and the rad. was almost dry when it came from GL.

 

[Dabba]

heh, low pressue light, well i know mine dosnt work..

 

[papercu]

Search the -20 for "low engine coolant" you have a light, sensor and a module to check. Wayne

 

[m38inmaine]

The sensor is on the right side near the heater hose connection on the radiator.

 

[flewbyu]

OK guys, Thanks very much for the info. Great site you have here...

 

[crusty]

I had the same problem with my new 1009. It wasn't any of the things mentioned and didn't cost a thing to fix. On the right side radiator tank, about 2/3 from the bottom is the sender. The plug that connects to it had some corrosion inside it and it was looser than it should have been. I used the shank of a 7/64 drill bit to scrape the inside of the connector and then worked the boot off to wire brush the outside. I then put the drill shank into the socket and squeezed the end to tighten the fit. When the fit is right, the connection will be easier to turn in one direction than the other. After this the function of the light has been great.

 

[Pawnshop]

Mine does the same, I am just going to replace the sending unit when I get around to it

 

[ralbelt]

Mine did that last nite, on the first long trip I took it on, 2.6 miles, round trip, it came on once for a few seconds now I know exactly where to check it, thanks troops.