I got in my Blazer today and it snowed a little today so I had to clean off the rear window. It was really slow and this is the first time it has ever done it for me. Could it be that its cold (-1 according to the outside temp gauge) or could the motor be going out? What do you all think?

 

Sounds like a weak motor, temperature should not affect an electrical component.

 

Yea I know it shouldnt but its weird because all of a sudden it just slowed way down, it used to be really fast when you have it on high. I guess Ill have to check into how much this is going to cost me. [:-]just bought the damn thing 2 months ago(Im starting to get fed up with GM viechles although it was used but my family has still had problems with brand new GM viechles)..

 

You didn't happen to look at your volt meter while this was happening did you?

 

Nope. Ill check later today. What should I look for? Any fluctuation (spelliing) in the needle? And what other problem would this tell me?

 

If your voltages dips, your wiper will slow down. If it does dip down to 12v or below, it could mean that there is a problem with your battery or just that your alternator doesn't put out enough power at idle.

Does it do it all the time now or will it speed up if you bring the engine to a high idle?

 

-1? you must be in maui or something.............i wish..............-38*C out today, and my rear wiper works great, well it needs a new blade thingy......

 

The alternator was just replaced, and the battery could be. I know very little about electricy, took a basic class in college but thats it.

It just started yesterday on my way to work and I tried it when I was comeing home and it still did it. That was while I was driving, roughly 1200 rpms.

And its not really cold for us but its slightly below normal the low last night was -6 F. -36 F wind chill. Let me tell you its sucks changeing a tire when its that cold (in office attire too). Oh well at least it was on they way home from work.

 

Ok, sounds like your electrical system is good then. Just wanted to bring it up so you didn't go replacing the motor just to have it happen again.

Just went through the ole shotgun approach with my dad's K2500 plow truck. It just quit on him Sunday while he was plowing out the church parking lot. I tried to help diagnose it for him over the phone while at work and suggested he check the relay and the fuse. Well, he said he checked the fuse... Long story short, I took a half day of work once he told me he was cutting a hole in his bed to replace the fuel pump (welded back in and covered with a bed liner so no worries right... LOL)... He now has a new fuel pump, a repaired +12v wire to the pump (whole thing was caused by a pinched wire that grounded out inside the harness), and a new fuse. We could have fixed the whole thing for pennies. Instead it cost $160... Haste makes waste... LOL

 

On the rear wiper arm, there is a rubber cover. Pop it off with a straight screw driver and check that the nut is tight. Apply a new coat of thread locking compound if it is loose. With the blade in the 'Park' position tighten the nut to 23 N-m (17 lb ft). Replace rubber cap.