Reply to Davo's Post: Yeah, I spent about 6 hours online last night and after about 50 sites, I was able to figure out everything that you told me. I was thinking it was one problem causing all of these items, but I think after reading - none of these items are related at all.
The confusing part is that ALL of these items are intermittent. They work perfect sometimes and later not at all...making me think it was some kind of control problem. After researching, I believe it is more likely a manufacturing problem like with the soldering inside the wiper motor. Several years of these wiper motors have been recalled for that circuit board up to the 1997 Blazer...but the 1998 isn't included in the recall, but for some reason the 98 hasn't been added yet even though I found well over a 100 postings for this problem on the 1998. I have a phone # for Chevy to get this fixed, so I'll probably get them to do that for free since the 98 should be added soon.
My main problem is the fan motor. It stopped working for a couple days and then it worked for a couple days and now it hasn't worked for a week or two. I was able to determine that there is a Blower Motor Resistor and a Blower Motor Relay. I found where the Resistor is located and it looks easy to replace. I don't know where the Relay is, but I was told that it was near the Resistor. The Blower Motor never made any kind of noise like it was beginning to fail, it just stopped working. In your experience, which of the 3 components is most likely the culprit? Do you know where it is and cannot it be easily tested or troubleshooted?
On the driver's window motor. It has worked on and off for 3 years now...sometimes for months at a time either on or off. It's off now. I found a website that shows step-by-step how to replace the motor and regulator but I'm not sure this applies to the 1998 model:
http://www.usedpartscentral.com/tech/page1.htm
Does this look about right to you? Is it a lot easier to replace the motor and regulator together? If I pay someone to do it - what should it cost approximately? Parts/Labor best guess or estimate? Is it common for the motor to stop and start working for months or does it sound more like a loose wire? When the switch is activated - it does cause the dash lights to dim, so power is going somewhere and I've already troubleshot the switch with a junkyard one without results.
I was able to find all of the same answers that you provided (although it took 6 hours), but I appreciate the quick response and confirmation that my research came to the same conclusions as you suggested. Replacing the Multi-Function Switch is definitely not the solution as the one website suggested.
I believe I have researched my problems as far as possible and would appreciate any answers to my NEW questions (Blower Resistor and Relay, Window Motor replacement) because I am done with my internet marathon.
Thanx,
Todd