Which is it ? 93 or 97 Internal fan - this is the HVAC - blower motor fan ! You don't need to check every fuse , just the correct one's !Doing electrical testing is the proper way to find what's wrong . Is it missing battery voltage or is it the ground part of the circuit ! Do you know how to do automotive electrical testing using a DVOM - digital volt ohm meter ? How to use a wiring diagram to pin point testing places .
Investing in some sort of service repair manual to locate the proper power and ground points for the afected system , rather then guessing . An learning how to do proper automotive electrical testing is a must . Or you should probably take it to a qualified repair shop . Electric Testing Techniques You Need to Know
Without testing I like anyone on here I'd be guessing > I would think a loose connection . Maybe these to systems share a common ground . Do you know what a body ground is ? You need service info . find ground locations .
Could be the speedometer or the speed sensor in the transmission. A mechanic would check the sensor with a meter. If the check engine light is on you should get the computer scanned for codes to see if the speed sensor has failed.
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Simple test - put the gearbox in first , run the car at idle and listen, now put it in neutral, fully stopped, release the clutch and listen : if the noise is quieter then the defect is in one of the bearings from the shafts inside the gearbox; if the noise is louder is in one of the gear sprockets or its synchro rings. In either case the gearbox will have to be dismantled and the faulty part replaced a job only a repair shop can do. It will be expensive so be prepared for a stiff bill.
The main sensor is mounted on or just in front of the catalytic converter. On a V6, there are usually two converters and two sensors. The device itself looks something like a spark plug, but has a wire bundle and connector attached. There is a special socket made for working with sensors and is usually fairly inexpensive. Disconnect the connector before the removing the sensor. Good luck!