2006 Camry 92,000 miles. With engine on, temp gauge pegs out on "H", and tachometer appears to function normally. When engine is turned off, Temp gauge falls back immediately to midway, and tach stays at 1400 RPM. I've got it sitting off to "cool down" but it didn't look like it was actually overheating. It had coolant in the reservoir, no fluid leaks, etc.
Make sure your battery is charged fully and the terminals are very clean. Get a free stress test at a parts store. If you have a charger, connect it up and see if that solves the problem. Voltage levels that might allow the car to start and run fine may be low enough to cause electronics problems with radios, gauges and locking mechanisms.
SOURCE: speedometer and tach
With the key in the off posistion press and hold the trip odometer reset button, the lights in the cluster will start to flash and the guages will do a self test. This should take care of your problem.
SOURCE: 2000 Toyota Celica coolant reservior empty
I hate to tell you this but its possible...
You have a leak. Look around on the driveway and try to determine if you have an external leak as opposed to an internal leak. If you see no coolant on the ground, suspect a blown head gasket. Do not continue to drive this car in this condition. If it does indeed have a blown head gasket, serious engine damage will occur.
Check your exhaust for white smoke. Chances are good you have a blown head gasket and coolant is leaking into the engines combustion chambers and is essentially burning off. Also check your oil, if it looks like caf mocha, this will confirm coolant is leaking into the oil via the blown head gasket
SOURCE: Install aftermarket tachometer
I'll take a stab at this, there's better than a 50-50 chance, and you can do no damage if the first try is wrong. Red is +12 volts and Black is chassis ground. that's a given. I would try Blue to coil pack "Tach" terminal, and Green for the dashlight. If I am right about the Blue and Green, a 9-volt battery from Green to Black will light the light if it's not burned out. If the Green doesn't light it, try the Blue, but my bets on the Green. If the Blue doesn't light it either, the bulb is toast.
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