What does a coolant level sensor do?
The coolant level sensor is the electronic sensor that is responsible for measuring the coolant level of your engine. It is usually installed in the coolant reservoir or radiator, and measures the amount of coolant in the system to make sure that it is always at the proper level.
How does a 2 wire coolant level sensor work?
The coolant level sensor works with a float that contains a ring magnet. The ring magnet closes the reed switch inside when there is enough coolant in the radiator. Once the coolant drops to a certain level, the float follows the level, the reed switch is removed from the magnet, and contracts the reed switch open.
When does the low coolant level warning light go out?
When you start the engine, the low coolant level light should come on for a second or two and then go out. If it doesn’t go out, either the coolant level is too low or there is a problem with the sensor system.
Where is the low coolant sensor on my truck?
Maybe 6 or 8 inches down from the top on either side as Freddyack stated. Low coolant light. My truck is a ’93 6.5 C2500 and the low coolant sensor is in the passenger side radiator tank. About a foot down from the top.
How does a coolant level sensor work in an expansion tank?
The coolant level sensor can be a float-type device, which activates the warning light when a low coolant level sends it to a low position in the expansion tank. Or it can involve electric sensors with two electrodes that are placed at the bottom of the expansion tank.
How to test the low coolant level bell?
Ignition OFF, disconnect the harness connector at the coolant level switch. Install a 3A fused jumper wire between the signal circuit terminal and ground. Engine running, verify the low coolant indicator turns OFF. If the indicator does not turn OFF, test the signal circuit for an open/high resistance.
https://www.youtube.com/watch?v=OAYvEmEXA-A