First and foremost, check the fluid! Second, check ALL the vacuum lines in the vehicle. Now as for the fuse... referencing the shop manual, I can not find a transmission related fuse. Did you try checking the trouble codes, if any?
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Hmm, are you sure its not second.This transmission does not have shift valves so the only way to have third is for the computer to command it.The default ratio is second (limp mode-no power to solenoids.This is common symptom with this transmission, any failure big or small will put transmission into limp mode.You could have a bad speed sensor( your trans has 3)or solenoid or something more major on the inside of transmission.You will need to have codes pulled in order to know which direction to go.If you will get me the codes and the CVI values i will tell you what is wrong.
suggest you check for a vacum line off that goes to the transmission modulator valve, which controls the shifting in transmission.or may possibly just be a bad modulator valve on the side of the transmission. 1st check for a vacum line off, with engine running do you hear a whistling or air sucking sound on top or rear of motor? if so, follow that sound to a hose or small black hose thats off.if you are driving the car and start off in low drive and can manually shift to upper gears with no problems,your problem is either a vacum line off, or it's a bad modulator valve on the transmission. hope this helps!!!
Sounds like the shift solenoids. A common problem, but before fixing that, try swapping the fluid with Multi-Vehicle type fluid. That transmission, mine included, seems to work better. If no improvement, then shift solenoids