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Battery Change = No Lights On Climate Control

03Yuke

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03Yuke Enthusiast

03Yuke

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My wife's '03 Yukon died yesterday so I replaced the battery and all is good except that the climate controls won't light up anymore. No display on it at all. I checked the fuses, the one that said HVAC, and it was fine. I saw similar problems while searching this forum but it appeared that everyone was able to control fan speed or temp and fixed it by following some reset type of procedure. I will try this as well when I get home but mine problem appears different since the display doesn't even show up. Is the climate control module toast? The vents also blow out hot air. Thanks for any help.

03Yuke Enthusiast

03Yuke

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Well, I thought I fixed this problem. I got the climate controls working again by disconnecting the battery and then hooking it back up and turning the key to the on position so it would go through its calibration. Everything seemed to work until yesterday when my wife told me she had trouble starting it again. This morning I went out to start it and it would turn over fine, but never catch. I have no idea what it could be but since I can't work on it at all this week and we are driving it several hours away next week for vacation I broke down and had it towed to a local repair place. This is the first real problem I have had with this SUV so I can't complain at all, it has been very reliable. Is there a part in the electrical system that will cause these symptoms or does this sound like more than one thing? I'll do a quick rundown of what happened so far.

 

1. Battery died while wife was cleaning it. She had the radio on but not started. I jumped it and it was fine for a week or two.

 

2. Battery died last week and I wasn't able to jump it. Battery was too low so I bought a new one. Figured this was the problem, weak or defective battery since it was 6 years old.

 

3. Wife had problems starting the car yesterday. Battery appears like it is strong since in cranks fine, just doesn't catch. She was able to start it up after trying 4 or 5 times.

 

4. This morning it would not start at all. It would just crank but never catch. Towed :D

txab Senior Enthusiast

txab

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Have you checked all battery cable connections including grounds and cables themselves?

03Yuke Enthusiast

03Yuke

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Have you checked all battery cable connections including grounds and cables themselves?

 

There was some corrosion on the negative cable connection to the battery but I cleaned it up and the contact is good, the only worn part was the battery side connection. The positive cable and connection look like they did the first day I bought it new. I didn't trace them all the way down though since they looked good.

03Yuke Enthusiast

03Yuke

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Well crap. Looks like it was the fuel pump. They just called me and said it had zero fuel pressure. This will set me back $967. Sounds high but I assume this one is in the tank. He is using an AC Delco unit and said it cost a little more but was worth it. I wasn't even thinking this was the problem since all of the other stuff just happened with the battery.

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