If you know where I can find a wiring diagram to show me the pins on the PCM, I can check the PCM's connection. I tried jumpering the pins on the connector for the low coolant sensor.still flashed. OK, I've VERIFIED that both sensors ARE good, as I replaced BOTH sensors with brand-new brass ones. It doesn't flash AT FIRST.exactly 38 seconds AFTER the car is started, the light begins flashing on/off/on/off. If all works well, use electrical tape to seal up. If the coolant light doesnt go away you may have a break in the wire somwhere or a bad connection to the jumper. I will definately try this in a few minutes. The coolant level sensor has only one job and that is to tell the computer when coolant is low so you dont have to worry that you may be causing any other problems by doing this. If it still flashes then.HIRE AN EXORCIST! Check the wiring diagram and locate the in/out pins for the level sensor at the PCM and jumper them AT the PCM. Jumper the level sensor connector posts and see if the flashing stops. The problem is in the WIRING or the sensor connectors for either or possibly BOTH the ECT and/or the TSS OR the PCM is getting NO SIGNAL back from the level sensor at the resevoir. Plug its harness into the spare ECT and leave it hanging out in space. Reconnect the ECT connector and disconnect the TSS sensor. The flashing light (regular) is usually an indicator of a serious disagrement between the reads of the ECT and TTS (automatics) To figure out which one, use a SPARE ECT sensor.ฤก.With the car cold (same as outside temeprature) Disconnect the ECT from the mounted unit and install it on the spare one just hanging out in space. If teh level is low at start up, the light will FLASH at first andf THEN remain STEADY ON, to indicate the low collant level. (That is how the PCM checks the sensor, the voltage should always be going thru it unless the level is low) If that is the case, jumpering the connector for the level sensor should fool the PCM into thinking all is well. It gets a voltage supply and puts it thru the sensor if the level is correct. If memory serves, the low coolant light is a THRU-PUT sensor.
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