Question about 2004 GMC Yukon

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2004 buick Rainier windshield washer pump stays on

My 2004 Buick Rainier windshield washer pump won't shut off so I had to pull the fuse to get it to stop. Do I need a new pump or is there an electrical problem somewhere else?

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  • sher26 Nov 18, 2008

    Is this something I can fix or do I have to take it to a shop? If I can fix it, how do I get to the relay or inside the switch?

  • sher26 Nov 18, 2008

    I checked the relay from the fuse box under the hood. When I initially tried shutting the pump off I removed the relay and not the fuse. I replaced the relay with a new one however the pump will run continuously. I have also checked the fuses which were fine. Is there a second relay under the dash? Also, do you know where I can find a diagram of the electrical system. I'm hoping to fix it myself before paying a lot of money to have someone else fix it.

  • sher26 Nov 19, 2008

    I checked my manual and there is only one relay for both the wiper and washer pump and another for just the wipers. I checked both relays and it is the relay for the wiper/washer that, when plugged in, cause the washer fluid pump to run continually. The wipers work fine with the wiper/washer relay removed. And every other function on the switch works fine. Is it possible that there is a short in the wiring by the pump that will cause it to run continuous? I'm hoping to find out myself if it's an easy fix before I pay someone else a lot of money to find it. Thanks for the help.

  • sher26 Nov 21, 2008

    Yeah, I went to the store and bought a new relay to try in the washer/ cycle ones wiper relay and just the washer relay. I had the same propblem. On the switch, the only function that does not work is the washer motor, all other functions work. I'm leaning towards a short somewhere in the wiring but not sure. I tried to check the motor itself but I wasn't able to pull it out. The blue/black wires were taped just before entering the motor and had come un-taped. I wasn't sure if that would cause it or if somewhere the ground wire came loose. I remember the day the pump first continued to pump was late summer when we got a lot of dew the night before so my car was wet. I don't know if the dew got into the motor/wiring to cause it to run continuously.

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  • Master
  • 899 Answers

If the positive side wire of the motor touches ground it will short out the power in the vehicle and it would stop the motor from running.
if the positive is good and is a line that is always hooked up to the power , and the ground wire is the contact for the motor to come on , then it could be touching ground and making the motor run.
otherwise the switch may seem ok but the contact points inside of the switch are staying connected.
dew will not cause the motor to run , but I would make sure that the wires that were taped up are not connecting with ground( the vehicle's metal ), and make the connections there correct before you do get a short that may cause a fire!
let me know what you have got from that

electech

Posted on Nov 22, 2008

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  • Master
  • 899 Answers

Yes this is an electrical problem. it is either the relay is stuck or the switch is stuck on the inside , since the motor is working.
it will need to be checked out to see which one is causing it to continue to run.
hope this information is worth a fixya and if you need any other asistance , just ask!

Posted on Nov 18, 2008

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  • jason Nov 18, 2008

    the relay will be in the fuse panel or plugged in a seperate line comming out of the steering colum)( under the dash)( looks like a metal box that plugs in)

    if it is the switch the steering colum will have to be taken apart to get the switch out and apart

    hope this is worth a fixya, but if you need more help i'll answer but you will need to check the relay to make sure we can eliminate it or determine if thats the problem or not( it will be stuck closed ) can you do this?

  • jason Nov 18, 2008

    then the switch in the steering colum to turn the pump on is stuck in the on posistion,

    did you pull the wiper motor relay or the pump motor relay?

    I don't have a repair manual for that , but you could get the chiltons manual for the electrical system on your truck for about $20 , and it will be handy on your next problem as well

    I got all the ones for my car knowing I will need them in the future , because I will not be getting rid of my car ever!



    But check that you pulled the right relay , because there is one for the wiper motor and one for the fluid pump , and if that is not the problem then the switch will need to be taken apart or even replaced if dammage inside the switch is unrepairable

    mess with the switch to see if it will pause or stop running , then that will for sure say if the switch is most definately the culprit , but it could be so stuck that messing with it will not make a difference

    is my info worth a fixya ? , those are the only things that can be causing it to stay on besides the hot wire connecting to another hot wire , but that is unlikely unless you smelled wires burning before it got stuck on , did you? if not then it must be the switch or relay , those are the only things that can cause this

  • jason Nov 21, 2008

    did you replace that relay? the washer / cycle once wiper relay? have you checked the switch for the washer motor?

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