Wipers on all of the time

Is that a control on the end of the t-signal rod?

You will have to remove the steering wheel to gain access to the switch. If it has an airbag, and you don't know what you are doing, take it in!
If you do know what you are doing, remove battery, wait 20 minutes to be on the safe side, remove steering center pad and/or airbage module, Remove nut and use a puller (most auto parts stores will loan one out for a deposit) to get the steering wheel off. If air bag equiped, release the coil of tension, and remove it. Remove the lock plate (VERY difficult even for experienced mechanics) and remove the multi-function switch body.
The switch for the wipers is a little further down, on the left side and you will have to remove the turn signal switch lever to get it out. Unscrew it, and trace the wires back to the long plug under the dash. You will need a tiny screwdriver to get the wires out of the plug. Use a digital camera to take a picture of this plug and the wires, and make sure you can tell what color wire goes where before disconnecting wires from the plug. Print out a copy and identify on the print which wires U pulled from it. Better safe than sorry. Sometimes memory gets things turned around.
Fish new wires trough steering colum and reconnect EXACTLY how the old one was connected. Replace multifunction switch, replace lock plate, replace coil and follow the printed directions on winding it up. Put steering wheel back on, making sure it's lined up properly, and tighten nut to the torque specified for your model. Plug in horn and airbag ane fasten it all back together.
Hope this helps you get a better understanding on whats involved. This model year only offered wiper switch combined with turn signal, and I've replaced them on several.