I have written about this many times but here it is once more.

To narrow down the possible causes of the erroneous blinking coolant
led, FIRST pull the "43" relay. If this stops the occurrences of the
blinking then the problem simply MUST BE in the coolant level circuit.
If this does NOT stop the blinking then the problem CAN'T be in the
coolant level circuit.

Mark

Steven Smith wrote:

> Ironically, the reason I changed the sensor in the first place was to stop the blinking warning light. It didn't stop blinking, so I changed the relay under the dash which also didn't help. So I disconnected the light.
>   Now, after this close call, I feel I need to get the light to work again.
>
>   I seem to remember that unplugging the coolant level sensor would cause the temp gauge to bury itself to the hot side no matter what the actual water temp was.  It's not doing that at the moment, which is making me think that the blinking light is not coming from the coolant level sensor circuit but the over-temp side of the circuit.
>
>   I've done everything suggested in the archive, replaced the relay under the dash and coolant level sensor, checked for voltage on pin 14? was it, and checked continuity of the wires.
>
>   I will check the grounds again and look at the temp circuit, if I can't find anything, could it be the Gauge itself?
>
>   I also seem to remember something about the coolant mix needing to be 50%? If true, that is sophisticated!
>
>   TIA for any assistance!
>
>