Coolant level sender

[vr2jetta]

1990 325i

My coolant light is coming on in the SI board. I pulled the sensor and cleaned it up and it still is coming on. I tried jumping the wire to shut it off till I got a new but it was still on.

Can you jump that wire and get the light to turn off? I dont know, I just tried it. Can you test the sender? I have the haynes and chilton and neither tell me how to test it, if its possible. I hooked up my multimeter but didnt know what to test and didnt see much difference in the readings.

[einstein57]

There is a resistor in the sensor. Sometimes the wire seperates and you can just solder it back together for a temporary fix

[vr2jetta]

Can you jump that wire and get the light to turn off?

I tried it and the light stays on. Im wondering if its the wiring

[BlackonBlack4.2]

I also have the same problem, could it be a bad connection between the sensor and the harness?

[vr2jetta]

Can you jump the wires at the plug to get the light in the SI board to turn off?


Is there a way to test the sender?


I am wondering if its a bad sender or bad wiring?

[thereisnoyun]

there is a metal piece in the inside of the float, that needs to be cleaned. It usually get gunked up to the point that it loses the contact. you cant see it, you have to remove the float, but pushing in the tabs on teh bottom, slide it out and you will see the ring, and just use a brush and degreaser and clean it off. put it back and it will work.

[vr2jetta]

slide it out and you will see the ring, and just use a brush and degreaser and clean it off. put it back and it will work.

Ive done this and it still does not work.

[vr2jetta]

Can you jump the wires at the plug to get the light in the SI board to turn off?


Is there a way to test the sender?

[BlackonBlack4.2]

I will try to clean it aswell, My connector that goes on the sender looks pretty bad (broken) and i will try to find a new one but in the mean time i will cut the wires and see if bypassing the connector will turn the light off. thanks for the info guys!

[vr2jetta]

in the mean time i will cut the wires and see if bypassing the connector will turn the light off.

Let me know! I have asked 4 times in this thread and no one seems to know (at least they havent responded) if this will work for checking the wiring.

[BlackonBlack4.2]

well nothin but rain today so i wasnt able to get to it. Rain or shine im going to do it 2maro.

[vr2jetta]

well nothin but rain today so i wasnt able to get to it. Rain or shine im going to do it 2maro.

Cool. Let me know!

[vr2jetta]

Any word on this?

[SpecM]

yes, you can jump the wires in between the connectors to turn the light off

[vr2jetta]

yes, you can jump the wires in between the connectors to turn the light off

Thank you! Obviously I have a wiring problem. Will look into tracing them later.