I doubt it's the motor. Could be the switch/stalk on the steering column; some members have reported the wiring harness in the getting pinched in the steering column.
Here's the link to schematics: http://www.naskie18.com/colorado/schema ... index.html

 

Did you already try checking the Nuts on the arms. I have experienced the same thing and it was a loose nut on the wiper arm hope this helps

 

Thanks for the responses guys.

I'm assuming the loose nut would just effect one arm or they may stop at different locations. This is happening on both. But I'll take a quick look in the morning to make certain.

I can't quite convince myself it could be a short as I would expect it to cause more random behavior (goes on and off, etc) - the wipers always turn off but just seem to go for 1 or 2 more cycles before it stops and then stops at different locations. Does that make sense? Maybe I'm just in denial because the last electrical problem I had (a/c) took the dealer 5 or 6 tries to find it and I'm not under warranty like I was then.

Anyway, I'll probably drop it by the dealer to see what their diagnosis is and if they point to the pinched wiring harness, I may be back here asking for help digging into the steering column. Thanks again!

John

 

I have a 2005 L4. I took it in some time back because the wipers no longer worked, the washer did spray water just no wipers. after they told me the motor was bad at the dealership and the cost to replace it (jaw dropped to floor). I took it home since I live in Arizona it was no big deal at the time, short time later the brake switch failed so back to dealer , well it rained a few days later and the wipers worked They have worked for about 5-6 months. This morning I went to wash the windows and no wipers at any speed. After reading the posts here. it sounds like there are several things to try out before heading to the dealer.

 

Right now I have the problem that my wipers won't turn off at all. They work on all the settings but when I put the switch to "off" it keeps going at low speed. I brought my truck to one place and they said they think it's something wrong with the BCM. Then I brought it to a dealership and they say it's the motor thats messed up. So right now I'm just driving around withe the wipers going all the time cause I don't have time to let them work on it since I need my truck to go to school.

 

I have a problem with my wipers too.it sometimes trun on with out truning the numb.even doe it's off.freak me out sometime LOL.

 

I experience the same **** problem!!!! my wipers will randomly make one pass over my windshield like once a week, just one time, up and down and thats it. never more then one cycle....i will be quietly driving the rode with no radio on so its fairly quiet in my truck, then all of a sudden i get this screeching dry rubber across a dry window noise shoot across my window just out of the blue. enough to scare an iraq war vet to have flash backs makes me want to make evasive maneuvers on the highway and hit the ditch like i was being shot at!!! heart skips a beat every time!!!! scares me enough to scream F'uk you WIPERS!!!!!!!

 

got home popped the hood and I checked the relay, it was clicking as the switch was moved. looked behind the plastic kick panel on the passanger side and saw some connection blocks.
I moved the wires around made sure all was tight. turned on the key and what do you know wipers are working again
being that its over a 110 degrees in the garage right now I didn't spend too much time looking around, but did notice a wire splice that may be from
an alarm I had put in, but I don't think that was it though, since I only messed with the large connection block. at least they work like normal for now .

Good luck with your wiper issues.

 

chevys are notorious for bad windshield wipers, but we love 'em anyway ::chevy:: . it is probably the relay switch under the hood

 

How do you test the relay while it's still in place? I get nothing when I turn on the wipers and nothing when I try the wiper fluid sprayer. Good fuse.

 

Understandably an old post. But if it helps someone, try this:
If I remember correctly bench testing supplying power to the blades 30(battery/constant) apply ground to ground and probe power to the switching terminal, you should hear a click, and if you test further by adding an accessory it should turn it on if it's switching properly. I've had the BCM replaced, programmed and having an issue with the motors and washer but only a matter of time til I find the issue. Testing in my spare time, what little I have of it

 

Did anybody come up with a difinitive problem regarding intermittant wipers being uncontrollably intermittant? I am experiencing the same problem and would really like to not spend a lot of time and money chasing the culprit around.

On a related note, on my last truck - a 1986 GMC S-15 - had a similar problem. So did my wife's 2003 Olds Cutlass Supreme, and my Dad's AstroVan. I found via an internet forum that the wiper motor controller card (a circuit board inside the wiper motor case) was prone to cracking at one edge and the crack would extend across one of the solder connections on the board. A careful drop of solder would correct the problem until the crack worked its way thru the new solder, usually about a year in our 4-season temperature zone. The almost-permanent fix was to buy and install a new circuit board, which at $60 was much more palatable than the close to $300 for a new motor.

I'm kinda hoping that the Colorado wiper problem is a similar problem...

 

I've had the same issue ,sometimes they work ,sometime the don't. Today they quit again got out and lifted the hood and wriggled the fuse box around and guess what they started to work again . wriggled it again and they quit, wriggled again and they started again. I think the fuse box is making a bad connection to the lower half of the box as it appears to be a two piece box. I'll have to have a look at it later this week when it stops raining.

 

windshield wipers not working

having same problems with windshield wipers.wont work at all and also wont spray fluid.checked fuses and relays and no problems my only guess would be the wiper switch.any ideas?

 

Obviously check the grounds also.

 

washer works, wipers don't

I was hoping someone could help? I have an 05 Colorado 2wd basic truck. My wipers stopped working from one day to the next. My sprayers still work. I replaced both relays, the fuse is good, and I removed and cleaned the ground blocks attached to both inner fenders. Is the motor under the plastic cover where the wiper arms are attached? Anything I might have missed before I go buy a wiper motor?

Help??? btw its raining and its supposed to rain pretty heavy the next 2 days. The wipers stopped on me yesterday.

 

washer works, wipers don't I was hoping someone could help? I have an 05 Colorado 2wd basic truck. My wipers stopped working from one day to the next. My sprayers still work. I replaced both relays, the fuse is good, and I removed and cleaned the ground blocks attached to both inner fenders. Is the motor under the plastic cover where the wiper arms are attached? Anything I might have missed before I go buy a wiper motor? Help??? btw its raining and its supposed to rain pretty heavy the next 2 days. The wipers stopped on me yesterday.

Where are those grounds located on the inner fenders. So I can clean mine. I'm having same issue

 

:welcome to C'Fans
If you are losing both high and low wiper speeds it could very well be a defective wiper motor. The ground for the wiper motor, washer pump and both relays is G101, located on the left aft lower part of the engine block. Forward most ground point of the three located there. You said the "sprayers" still work, so the ground should be good. The BCM controls all wiper speeds, except "High". High speed is controlled directly from the switch through the two relays. If you still have high speed, the BCM could have a problem. The motor is located under the cowl in front of the windshield.

 

Thank you cart, I was afraid of that. Sorry for the dup thread. Ill post if that fixed my issue when ive changed it out.

 

motor turned out to be defective. replaced it and im back on the road. thank you cart!

 

i lost low & hi wiper speed, on my 04 colorado, dealer reprogramed my BCM. (body control modual) works gr8 now. $ 168.00
blinker dose NOT click click any more. but blinker works just fine. they want $ 500.00 for the (CHIM) chip. i dont think so. and $250.00
to install it. ya righ!!!!

 

My wipers are crazy too. They stop halfway up the windshield every time. It also seems that the motor is always in high gear, even on intermittent, the wipers mover really fast and there is no difference in low/high.

 

This is confusing because it seems to be two separate problems. One is the failure to properly park and the other is the speed control. Not sure if we went over this before, but there are a couple of things that you can check relatively quickly, without expense. Disconnect the connector for the wiper motor and check the condition of the pins. It is a four pin connector and is located, inline, just to the left of the brake booster. The other thing is the ground for the wiper circuit. I posted a location and picture, earlier this morning, here:

http://coloradofans.com/forums/61-g...s/61-general-truck-chat/251786-passenger-door-power-lock-works-irregularly.html

There are two wiper relays in the fuse box, but the wipers will not operate on high speed unless both are actuated. That leaves control of the speed to the column switch and the BCM. If I had to guess between the two, it would be the column switch.

Another possibility is that the motor assembly has somehow got water in it and that is causing problems with the park circuit and the low/high speed wiring.

 

Thanks Byron, I will give them a look over this evening if it's not raining.

 

I checked and cleaned the ground behind the airbox and also cleaned and greased the wiper motor plug with no change. I pulled the wiper arms off and moved them around a little. Seems like after I do this they work good in the driveway but get on the road and they go haywire again. I got my wiper arms mixed up, anybody know which one goes where? One is about an inch longer than the other but the blades are the same length.

 

The longer one goes on the passenger side.

 

I'm having the same issue. 2005 Colorado LS 4x4.


Wipers will work one day, then stop working the next. I'm wondering if water is getting in the motor? They seem to stop working when it is damp...or raining out. Convenient!

 

It's a good possibility that the motor is defective. If you are into electrical troubleshooting and have a multimeter, let me know and I send you some info. First, I would suggest checking the ground. Click on the link in Post #23.

 

I'm having a similar issue. When it is damp out or misting my intermittent wipers will not work. Even the manual wipe switch does nothing. However the full speed position still works. I am thinking that my motor casing is no longer sealed and that the pulse control board is shorting when humidity gets in the case. has anyone had this issue before? and also does anyone know where I can purchase just the circuit board and not the whole motor? even a part number would be helpful. Thanks guys.