96 Brake Booster and Wheel Bearings

I changed my brake booster yesterday (kinda tough). When I was finished I started the vehicle and right away I noticed the SES light on. I drove down the road and also noticed that my temp guage was not working. Does anyone know where the senser for the temp may be located? I guess I may have somehow damaged or unplugged it. I was also wondering how hard is it to replace front wheel bearings. I have a roar/hum coming from the front wheel. When ever I turn wheel slightly to the right it goes away so I am hoping it is just a wheel bearing.

Temp sensor is located at the top left hand side of the engine compartment,near the rear valve cover.
Sorry,can't help you on the wheel bearings.

check out this link in acna forums it is a good write up! http://aurorah.proboards47.com/index.cgi?board=Gen&action=display&thread=1111436154