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The tachometer will have wires coming from the back of the gauge. One is a ground wire, one is a power supply sire, and one connects the vehicle’s ignition system either via the ignition coil or through an electronic connection with the vehicles computerized ignition.
Apply power to the tachometer by attaching the power input wire of the tachometer to the 12-volt dashboard lighting supply of the car. Provide power to the tachometer backlighting. Locate the 12-volt switched dash lighting supply for the dashboard on the car fuse box. Attach the tachometer backlighting wire.
You can disconnect the negative terminal of your battery, and then let it sit for 15 minutes (always longer than recommended for good measure), and then hook it back up, and it should reset the module.
Re: Used TCM Need Reprogramming or Not? Short answer is NO. No programing is required if the new TCM came out of a working car of the same elk as yours.
If the sensor that tells the PCM if the transmission is in gear or park or neutral (prndl) is incorporated in the TCM it could prevent starting the engine if the PCM thinks the transmission is in gear.
Some of the most common signs of a bad transmission control module are as follows:
The average cost for transmission control module replacement is between $776 and $803. Labor costs are estimated between $100 and $126 while parts are priced at $677. This range does not include taxes and fees, and does not factor in your specific vehicle or unique location.