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Electrical: How To Replace Your Reverse Light Switch MU3

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Old 05-20-2012, 10:11 PM
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I used the silver anti seize, same as I use for lug nuts, caliper bolts... etc.
Old 06-09-2012, 09:25 PM
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Hello everyone, I have an Automatic 2.4 SS can't find the backup switch.
Any help would be appriciated.

Thanks

JAMIE
Old 07-05-2012, 04:06 PM
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thought I would add my input to this.

You need a 22 mm deep well socket, 24" extension, had a tough time with smaller extensions. And here is the pic i took of it to the left of the fuse panel. Just move the splitloom and coolant hoses (hard lines) out of the way.

Old 08-07-2012, 09:03 AM
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Photo of back-up switch location

This is the best diagram I have found. It all depends which engine model you have the 2.0L is a pain in the butt all around, the switch for it is under the fuse box. took me a half hour just to find it. The way I figure chevy had their hand in designing it so that you had to go to the dealership to get this stuff repaired but screw that!

2007 Chevrolet Cobalt Electrical System Problem Back Light Switch Location On

http://s3.amazonaws.com/2cp-images/q...jpg?1314020918
Old 08-12-2012, 03:51 AM
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My horn stopped working at around the same time, is this common or do you think its an entirely different problem?
Old 08-12-2012, 02:02 PM
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Originally Posted by Contrastic
My horn stopped working at around the same time, is this common or do you think its an entirely different problem?
your horn has nothing to do with your back up lights. Different problem. The switch is a very common part to fail on all GM's. Horn... never heard of that.
Old 08-14-2012, 05:17 AM
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Originally Posted by c130aviator
your horn has nothing to do with your back up lights. Different problem. The switch is a very common part to fail on all GM's. Horn... never heard of that.
Thanks for your reply. Then might my problem be a fuse rather than the switch?
Old 08-14-2012, 10:02 AM
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Originally Posted by Contrastic
Thanks for your reply. Then might my problem be a fuse rather than the switch?
maybe. only way to know is get intimate with your car. I spent an hour one day checking everyfuse to figure out an issue I was having with the HVAC. Weird thing is it just took me unplugging the vent blower motor and plugging it back in.

You will find our cars are crap for quality. Saddens me.
Old 09-24-2012, 01:08 AM
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Anyone have a pic of which fuse to check before I go buy the part?
Old 10-23-2012, 10:10 AM
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Damnit, ok going to buy the switch today
Old 10-23-2012, 11:52 PM
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ordered. Price influx since OP made this thread. I paid 29$ for it. Still not alot. No biggie.
Old 11-01-2012, 01:18 AM
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Here is a picture of the switch in the car, and the switch out of the car

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Old 11-01-2012, 05:33 PM
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not bad....good write up and thanks for the info on future reference,and also thanks for the price
Old 11-08-2012, 01:06 PM
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i had my clutch replaced a few months back and they forgot to hook up the reverse lights... i cant find the damn harness... does anyone know which loom the reverse switch plug comes out of? Ive felt around as much as i can and i cant find it.
Old 11-08-2012, 01:24 PM
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Put your tranny in 4th gear and feel around again
Old 11-08-2012, 02:24 PM
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you can literally see it, which is why i included a picture, its to the left of the fuse box. 4th gear, move wires, look down
Old 11-08-2012, 02:26 PM
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^this
Old 04-09-2013, 12:08 AM
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Been working on it all night and cant get it out.

Mainly because the hose in the left side of the picture doesn't move enough for me to get down to the cord.
Old 04-09-2013, 12:34 AM
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Reach in by firewall and come back. If my hands can get in, anyone's can
Old 04-12-2013, 08:12 PM
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FINALLY GOT IT!! Purple Led's in and they lookin sexayyyyy
Old 06-13-2013, 01:28 PM
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Thanks to everyone above. This was a quick and cheap job. I have a 2.4L Manual and it was behind the drivers side wheel, and happened to be a 3/4 socket. Part cost $46 at the stealership and took me about 10 minutes. Again, thank you guys!
Old 06-13-2013, 02:00 PM
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You should had gone to Auto Zone and they have it for $13 dollars special order. I did went to stealership they want it for about $45. All I did to ask them part# then went to Auto Zone. It's the excact same parts and I put in my car it's perfect fit and connector plug in perfect.
Old 06-13-2013, 02:05 PM
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Also, I forgot to add. When You go to Auto Zone, they don't have that part listed for Cobalt. I told them to check and see interchange parts. It ring up showing listed Saab and I told them that it's the same as Cobalt. They didn't believe me then I put it in then I showed them. They believe me alright, they were like I am surprised that our system didn't updated. I was laughing and left. LOL!
Old 08-13-2013, 02:13 PM
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Did this the other week and was very simple, even for an automotive newbie like myself. The hardest part is making sure you have the right extensions as it's pretty far down.

Also, it ended up fixing my cruise which also stopped working around the same time.
Old 09-05-2013, 08:36 PM
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]There are a few of you that do not have any backup lights when putting your car in reverse. I hope this Helps! This is for the MU3 transmission and not the Getrag.

1. Go to your local dealership and buy GM part no. 24459626
2. You will need the following tools: 1/2 ratchet, long 1/2 extension, 22mm deep socket.
3. Shift your car into 4th gear. (please make sure the car is not running!!!)
4. Look down between your fuse box and your motor, you will see a plug with two wires on it. It will be right on top of the transmission. You might have to move some cables out of the way. However you will not have to remove or dissasemble anything!!!
5. Pull the plug off the old switch, then use the socket to remove it.
6. To install the new switch, do this backwards.

This only took me 10 minutes![/QUOTE]


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