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97 GMC Suburban - Blower Control Backwards
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dow321
Novice
Sep 24, 2013, 4:01 AM
Post #1 of 12
(2223 views)
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97 GMC Suburban - Blower Control Backwards
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Odd Thing! My blower turns to low when it is on high and goes higher as I turn it left to low setting. When I turn to "OFF", it does not turn off. Is my control bad?
(This post was edited by dow321 on Sep 24, 2013, 4:01 AM)
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Hammer Time
Ultimate Carjunky
/ Moderator
Sep 24, 2013, 5:15 AM
Post #2 of 12
(2211 views)
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Re: 97 GMC Suburban - Blower Control Backwards
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How did this start? Has anything been changed on the truck? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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dow321
Novice
Sep 24, 2013, 9:39 AM
Post #3 of 12
(2198 views)
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Re: 97 GMC Suburban - Blower Control Backwards
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No. I did not change anything on it. Sunday it was fine. On my way to work, i turned it on and low became high and high became low. On OFF it is just very low. I am thinking the knob may have felt a little loose. It was hard to tell. Does not feel that way now. Not sure. Maybe something moved inside the switch? Funny how it is backward though.
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Hammer Time
Ultimate Carjunky
/ Moderator
Sep 24, 2013, 11:19 AM
Post #4 of 12
(2187 views)
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Re: 97 GMC Suburban - Blower Control Backwards
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No, not likely. Check the knob first and then you are going to have to do some signal testing at the blower resister. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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dow321
Novice
Sep 29, 2013, 3:05 PM
Post #5 of 12
(2163 views)
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Re: 97 GMC Suburban - Blower Control Backwards
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I tried changing the resistor just to see. No change. Everytime I turn the knob I hear clicking. I found the small relay box next to the resistor. Could this be the issue? Also, when I turn on the A/C, it does come on but the little orange light no longer lights up on the A/C button. I appreciate any feedback. Andy
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Hammer Time
Ultimate Carjunky
/ Moderator
Sep 29, 2013, 3:09 PM
Post #6 of 12
(2161 views)
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Re: 97 GMC Suburban - Blower Control Backwards
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I advised to test at the resister, not replace it. Testing the signals arriving there would tell you what's going on with the switch. Nothing is for sure until some testing is done but it sounds like you have some issues with the control head. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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dow321
Novice
Sep 29, 2013, 3:46 PM
Post #7 of 12
(2155 views)
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Re: 97 GMC Suburban - Blower Control Backwards
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Sorry. I know you said that. I am not that good at testing. Took about 2 minutes to change it. I will just take it back. When you say control head, do you mean the backside of the switch on the dash?
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Hammer Time
Ultimate Carjunky
/ Moderator
Sep 29, 2013, 4:06 PM
Post #8 of 12
(2151 views)
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Re: 97 GMC Suburban - Blower Control Backwards
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The entire assembly has to be tested for all functions ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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dow321
Novice
Oct 3, 2013, 4:11 PM
Post #9 of 12
(2134 views)
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Re: 97 GMC Suburban - Blower Control Backwards
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Hi. I have been working on this. I am trying to find where the ground is. Do you know where it is connected?
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Hammer Time
Ultimate Carjunky
/ Moderator
Oct 3, 2013, 4:13 PM
Post #10 of 12
(2133 views)
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Re: 97 GMC Suburban - Blower Control Backwards
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Why, have you determined there is no ground at the motor? How did you do this? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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dow321
Novice
Oct 9, 2013, 5:20 PM
Post #11 of 12
(2109 views)
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Re: 97 GMC Suburban - Blower Control Backwards
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Hi. I worked my way back to the switch. I found the lights around the blower knob did not work as well as the recirc light and A/C light. They worked, but no light. I figured something must be wrong with the control. I installed a new used one and all is good. Works normal and lights are all on now. I put in a whole climate control panel with the 3 knobs. It was easy and took about 5 minutes.
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Hammer Time
Ultimate Carjunky
/ Moderator
Oct 9, 2013, 5:24 PM
Post #12 of 12
(2107 views)
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Re: 97 GMC Suburban - Blower Control Backwards
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Glad to hear you got it resolved. Question closed as solved. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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