Question about 1992 Mercedes-Benz Mercedes Benz 300 Class

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Coolant light wont shut off after adding cooland 1992 300te

After adding coolant to the radiator reservoir the coolant level instrument light still will not shut off I have a 1992 300te

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Hello, If you are sure that the reservoir is filled properly, unplug the 2 pin connector on the side of the reservoir and see if the light goes out. If the light goes out, you need to replace the sensor which is what the connector hooks to.
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Thanks, Gator241

Posted on Feb 11, 2009

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Posted on Jan 02, 2017

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Temp gauge in 98 pontiac wont work is there a fuse for it


Hi Tammie, Is the coolant level low ? If not , The engine coolant level switch grounds the indicator with the coolant level in the coolant reservoir below the minimum recommended level. The engine coolant level indicator module is on the right side of the radiator just down below from the radiator cap !
Low Engine Coolant Indicator Always On

Step

Action

Value(s)

Yes

No

1

  1. Disconnect the engine coolant level indicator module connector.
  2. Turn the ignition switch to the RUN position.

Is the low coolant warning indicator ON?
--
Go to Step 2
Go to Step 5

2

Inspect for a short to ground in CKT 68.

Does a short to ground in CKT 68?
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Go to Step 3
Go to Step 4

3

  1. Repair the short to ground in CKT 68.
  2. Inspect the system.

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System OK
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4

  1. Replace the instrument cluster. Refer to Instrument Cluster Replacement .
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Is the repair complete?
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System OK
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5

  1. Replace the engine coolant level indicator module. Refer to Coolant Level Module Replacement in Engine Cooling.
  2. Inspect the system.

Is the repair complete?

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1 Answer

Why is my1997 chevy lumina low coolant light is on and the radiator is full of coolant ?


In most newer chevys, the coolant reservoir is part of the pressurized system. Rather than just holding overflow coolant and relying on the radiator pressure cap to draw from and expel to the reservoir, it is an active part of the cooling system. On these systems, there is a coolant level switch in the reservoir. This will activate if the level in the reservoir gets below a certain point. So it is possible to have a full radiator and still get a low coolant light. Be advised that as the reservoir ages and get stained, it is not uncommon for the low coolant sensor to give false indications of low coolant.

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Someone added water to my DEX-COOL only 1996Chevrolet. 1500 suburban. What should I do. I only ran it for about 45 miles


Was the water added to the coolant reservoir or into the radiator? If the coolant reservoir it's a simple matter to unbolt it, drain it, reinstall and refill to proper level. If water was added to the radiator, it's best to drain the coolingg system and refill with the proper 50/50 mix of Dexcool. Water in the radiator will not hurt anything in the short term, but will not provide adequate protection.

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Loses water from resevoir but not from radiator


So the level keeps dropping in the reservoir? If you have to keep adding coolant to the reservoir, the system is leaking or losing coolant somewhere. Have the system pressure tested to find the leak. Is the reservoir itself leaking? When the level gets low enough, first the reservoir will go dry, then the radiator level will start to drop.
Here's how the reservoir works: coolant is under pressure from the radiator cap seal. As coolant heats up from hot engine, it expands, and pressure forces the radiator cap seal up, coolant is forced into the reservoir-remember the hot mark on the reservoir? When car is shut off, coolant contracts, creating a vacuum in top of radiator. This vacuum works to suction coolant back from reservoir into the radiator, keeping the radiator topped up, and coolant should now be at the lower cold mark on the reservoir. It is a closed, sealed system. The only loss of coolant will be a very small amount of evaporation from the reservoir. If coolant level keeps dropping, there is a leak somewhere.

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What is this cap on?? Radiator or windshield washer reservoir? Something else?

If the radiator, most newer cars have a plastic bottle or tank that has a "cold" and "hot" level indicated. You should be able to see the coolant level thru the tank. You should NOT need to open the radiator cap if your car has this tank. Add a 50/50 mixture of water and coolant (of a type your car requires) up to the "cold" mark and start the car. Let it run with the heater set to HOT and fan set to HIGH. Continue adding the 50/50 mixture to maintain the coolant level to the HOT level mark on the tank as needed with the engine running. Stop when there is HOT air blowing out of the heater.

If your car does NOT have this tank, you may only open the radiator directly when the engine is COLD. Wait several hours for the engine to cool after shutting off before attempting to remove the cap.

When cold, press DOWN on the cap WHILE turning. Most caps will come off after a 1/4 to a 1/2 turn. Start the engine and set heater HOT and fan to HIGH. Continue to add a 50/50 mixture of coolant to the radiator until the heater blows HOT air. The coolant level in the radiator should be just under (1" or less) from the bottom of the radiator opening.

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Sep 13, 2013 | Cars & Trucks

1 Answer

Where do I add antifreeze


if you dont see radiator cap on radiator.you pour coolant in the coolant reservoir jug until coolant level stay on full cold mark.when adding coolant to coolant reservoir jug when coolant level stop dropping stay at full cold mark.you have correct amount antifreeze in radiator.

Mar 26, 2013 | Cars & Trucks

1 Answer

How do i remove engine coolant cap on 2001 cadillac dhs


WAIT UNTIL YOUR ENGINE IS COLD,YOUR RADIATOR PRESSURE CAP IS LOCATED ON THE COOLANT OVER FLOW RESERVOIR, THATS WHERE YOU ADD COOLANT WHEN COOLANT LOW,YOU POUR COOLANT IN THE OVER FLOW RESERVOIR UNTIL COOLANT LEVEL REMAIN AT FULL COLD MARK DONT OVER FILL OVER FLOW RESERVOIR, WHEN COOLANT LEVEL STOP DROPPING WHEN ADDING COOLANT AND COOLANT LEVEL STAY AT COLD MARK ON THE RESERVOIR YOU RADIATOR HAS THE CORRECT COOLANT LEVEL IF COOLANT LEVEL KEEP DROPPING CHECK FOR COOLANT LEAKS AROUND RADIATOR AND THE TOP AND BOTTOM RADIATOR HOSES, LOOK FOR COOLANT LEAK AT WATER PUMP GASKET OR SEAL OR LEAK AT WATER PUMP WEEP HOLE IF YES REPLACE WATER PUMP.

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1 Answer

I have a 1992 Buick Regal, and my coolant light was on the other day, and after I added some fluid to the overflow tank, it is still on. How do I add the coolant to the radiator itself? because I think...


3.1 liter?

If so the level sensor is in the reservoir. Sometimes the level gets stuck if the coolant gets low. Some gentle whacking of the reservoir with a rubber mallet is usually enough to get the light to turn out.

3.8 liter?

When the car is cold remove the radiator cap on the passenger side of the radiator. Add coolant until full.

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After flushing radiator for 1986 Ford Taurus, where do the coolant go? In the radiator or in the reservoir? And Do you have to idle with heat at full blast before adding the coolant?


Put the coolant directly into the radiator until it's full. Start the engine and run it, watching the fluid level. Keep the coolant within one inch of the neck. Fill the reservoir about half way when the radiator is full.

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