Got a 2009 HHR LT2 got an interesting problem. Occasionally not always when I put car in reverse the ac will weaken or stop together for a second or so.
First thought was blower motor resistor and part is coming but seems odd it seems to only be happening when I go into reverse.

No codes showing when I connect.

Anyone ever seen this?

 

I know this may sound wierd but have a load check done on your battery.

 

Welcome to the site. Yes X2 check the batteries condition and the alternator charging system.

 

Load test was good. Changed out blower motor resistor, air filter and blower motor. It seemed better then cut off again for a second when I was idleing. Then kept blowing rest of time. Not even sure. I would think of it was fuses it would be an a or nothing thing.

Going to have to go test alternator but nothing else seems to lose power.

Other ideas?

 

Do your back up lights work? Anyone played with wires before this started?

 

Drove it most of today only cut off one more time while parked right after start.

I will double check reverse lights tomorrow.

​​​​​No one has been in the wiring. The randomness of it leads me to believe it's wiring somewhere. If it was a fuse or relay I would think it would be 100% off. But maybe not.

 

Reverse lights and brake lights working.

Cuts off every now and then while driving or stopped. Stays off for a second then comes right back.

​​​​​​Any other ideas? Wondering if it is a switch issue on the controls maybe? Doesn't feel loose or anything like I would expect though.

 

Little update. Discovered when it cuts off if reach down and lightly push on bcm it kicks back on instantly. Something loose in there maybe?

The bcm wouldn't need to be reported for a blower motor would it. That seems silly.

 

" reported " ? What are you asking ?

 

Press all fuses and relays firmly into the interior fuse pane. They can shake loose over a period of time.