John; If the wire between your gauge and the temp sender gets shorted to ground , or if the coolant level sensor becomes disconnected, you will get the same symptoms. Since it should be pretty obvious if the level sensor is un-hooked your problem is likely to be the temp sensor. That sender (on our 85) is near the water pump/ thermostat. It has a single terminal that looks like a nail head. Locate it. Find the wire that should attach to it, it is probably making contact against the engine . If it is attached disconnect it. Is the problem gone ? the sender is shorted. Led still flashing? Problem is upstream , look for a pinched wire. Let me know. Good Luck ken lewis kdlewis@ juno.com 86crewcab 85GL On Sun, 13 Oct 1996 20:45:10 -0500 jmendoza@baynetworks.com (John Mendoza) writes: >Re: 84 Vanagon (gas engine) > >I just changed the coolant to a Prestone non-phosphate "looks like >orange syrup" coolant. It looked pretty appetizing ;-) > >Anyway, I think I broke something because when I started the engine, >the >temperature indicator rose very quickly while the LED sensor blinked >rapidly. The temperature LED sensor has not yet stopped blinking, and >the indicator is all the way to the right (MAX temp) even though the >engine was cold.
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