Question about 1990 Pontiac Bonneville

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Low coolant indicator light is stuck on. How can

Low coolant indicator light is stuck on. How can I turn it off. Coolant level is fine.

Also, where is the security door probe located in the driver side door.

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The coolant sensor switch on the radiator is at fault. simply disconnect the connector from the switch

Posted on May 09, 2010

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My early wRning light for low radiator fluid comes on at the start turn on my ignition, but it goes away shortly after. I bought 50/50 and filled the coolant reservoir to the full line. But the light still...


The CHECK COOLANT indicator illuminates when the coolant level is low in the coolant recovery reservoir. The low coolant level switch is probably in or on the coolant reservoir !

Feb 19, 2015 | Cars & Trucks

1 Answer

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?
--
Go to Step 3
Go to Step 4

3

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

Is the repair complete?
--
System OK
--

4

  1. Replace the instrument cluster. Refer to Instrument Cluster Replacement .
  2. Inspect the system.

Is the repair complete?
--
System OK
--

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?

Feb 01, 2015 | 1998 Pontiac Grand Prix

1 Answer

A light come on with a box with arrow pointing down looks like waves what does it mean


This indicates a low level of coolant in the coolant bottle/resevoir..... this symbol represents the radiator or coolant system liquid level.

Warning comes on to warn of coolant level too low.

When the engine is cold...remove the cap and check level. Add 50/50 antifreeze/water to level indicated on the side of the coolant bottle or tank.

Reservoir Bottles/tanks are usually transparent and you can see the coolant level through the plastic.

When coolant topped off to correct level, lamp will go out automaticly...no need for scanner or shop to turn it off. It will come on as a 'self check' when you turn on the ignition and if level is okay will go out when engine starts.

Sep 13, 2011 | 2004 Chevrolet Cavalier

1 Answer

I have a red warning light that is activating on my 1999 Malibu Dash. It is on the lower right hand side & looks like a low water indicator. My fluid levels all seem fine.


If your collant level is ok, check your coolant level sensor. Its located on the coolant reservoir, usually at the bottom!! If faulty it will illuminate the low coolant indicator.

May 29, 2010 | 1999 Chevrolet Malibu

3 Answers

Coolant level low light comes on and coolant level is not low in reserve tank or radiator.


There is a TSB for this problem. Here it is.


Bulletin No.: 04-06-02-007

Date: August 11, 2004

TECHNICAL

Subject:
Low Engine Coolant Level Indicator Always On (Diagnose Low Coolant Level System Operation/Check Sensor for Oil Contamination)

Models:
2000-2002 Buick Century, Regal
2000-2001 Chevrolet Lumina
2000-2002 Chevrolet Impala, Monte Carlo
2000-2002 Pontiac Grand Prix
2000-2002 Oldsmobile Intrigue


Condition

Some customers may comment that the low engine coolant level indicator is always illuminated.


Cause

The cause of this condition may be due to engine oil contaminating the coolant. Possible sources of oil contamination are internal engine leaks, improper service procedures, or the addition of some types of anti-leak additives to the cooling system. Once in the coolant, the oil leaves deposits on the level sensor creating an insulating film. This film results in a false activation of the coolant level indicator.


Correction

Diagnose low coolant level system operation and check the sensor for oil contamination using the procedure listed below.


Important: No coolant supplements should be used in GM cooling systems, other than what is approved and recommended by GM. The use of "aftermarket" over-the-counter sealing and cooling supplements may affect the operation of the low coolant level sensor. Discoloration of the coolant recovery bottle is normal and does not necessarily indicate that coolant contamination is present. Flush cooling system only when instructed by this bulletin.

1. Verify that the coolant is at proper level in the radiator and the coolant recovery bottle. If the coolant is low, add proper amount of 50/50 water and DEX-COOL(R) mixture. If the low coolant light operates properly, diagnose the cooling system for loss of coolant as outlined in SI. DO NOT proceed further with this bulletin.

2. Remove the low coolant level sensor. Refer to Coolant Level Module Replacement in the Engine Cooling sub-section.

3. With the key on, the engine off and the coolant level sensor disconnected from the vehicle wiring harness, observe the low coolant light:


^ Light is on - Chassis wiring or instrument cluster concern. Follow the appropriate diagnostic information in SI.

^ Light is out - Proceed to Step 4.



4. With the key off, connect the coolant level sensor into the vehicle's wiring harness. Connect a ground wire (1) to the battery negative terminal. Using a sharp probe (3) attached to the ground wire, ground the coolant sensor probe (2) as shown in the illustration. Make sure a good contact is made. With the key on and the engine off, observe the low coolant light for at least 15 seconds.


^ Light is on - Replace the low coolant sensor and re-check system operation.

^ Light is out - Proceed to Step 5.


5. Using a small wire brush or emery cloth, polish the low coolant level sensor probe to remove any film or oxidation. The probe should be a bright brass color when finished. Use Brake Parts Cleaner to flush removed deposits from the low coolant sensor probe. Re-install the low coolant sensor into the vehicle and proceed to Step 6.

6. Flush the cooling system and install new DEX-COOL(R) mixture as outlined in the SI. Check the vehicle's warranty history to determine if any engine gasket had recently been changed. If there has not been a recent gasket replacement, locate and repair the source of the engine oil contamination.


Oct 31, 2009 | 2002 Chevrolet Monte Carlo

1 Answer

COOLANT LEVEL LOW INDICATOR LIGHT ON


There is a small float within the coolant tank, if the coolant level becomes too low the indicator light will illuminate. Bringthe engine up to running temperature, look for any leaks, add coolant to the tank to the proper mark. It should note "leval when hot" this should turn the light off too. If not the float may be stuck in a down or "on" position.
I hope this may have helped,
Tom

Oct 02, 2009 | 2001 Cadillac DeVille

2 Answers

My low coolant light comes on on a 2001 chevy silverado regular cab pickup. Could a worn out thermostat be causing this?


check level in your overflow bottle-check if sender not sludged and seized-check wires are connected properly

Jul 13, 2009 | 2000 Chevrolet Silverado

1 Answer

'low coolant"


Inside the surge tank is a float that turns on the "low coolant" light. As the float gets gummed up it gets stuck in the low position. I've had good luck in cleaning the surge tank out really well and ungummed the float so it slides up and down like it should.

Jul 15, 2008 | 1997 Chevrolet Lumina

3 Answers

Help


Hi Amber

This is the Low Coolant Level indicator. You may need service soon. Hopefully, you are just low, however, it could indicate other problems (minor or major).

NEVER remove the radiator cap while the coolant is HOT!

Here is info straight from your owners manual:
Low Coolant Warning Light
This light comes on
briefly when you turn
your ignition on.
If this light comes on and stays on and you hear a chime,
the vehicle should promptly be pulled off the road and
the coolant level checked.

Jun 15, 2008 | 1999 Chevrolet Malibu

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