When you quickly turn on the key and start the engine, does the light stop blinking for a few seconds and then come back on? If so, there is likely a problem at the main tank where the sensor is. The cable may be loose, the connection may be dirty, the sensor may be bad or dirty/ or the coolant in that tank may actually be low. The overflow tank is not where you need to check. You must open the engine cover and check the main tank. Verify the level by unhooking the small hose from the cap and opening the cap, slowly if the engine is hot. Slowly add water to the top. Put the cap back, start the engine and check for flashing.. If the light flashes continuously even when the engine has just been started the fault is often in the temp gauge itself. A simple test for this on 86+ models is to remove the coolant level relay from relay socket #3. This relay will have a large 43 printed on the end of it. (some late model versions have 42 on them instead). If the flashing continues with this relay out, the cause MUST lie in the dash wiring or instrument cluster. Mark
Keith Pike wrote: >Just fired up the bomb and the water temp light stays on blinking; >heaters work and o/f tank is up. what to check next? >TIA >Keith, NL >Canada > > >-------------------------------------------------------------------------------- > > > |
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