As the title says, I installed the auto-dimming mirror in my 1LT Cruze. It works great and I love it.
A couple months ago I was wondering how hard it would be, so I did a little research. I found out that my '14 Cruze has all of the wiring, except for the wires in the headliner harness. It even had the fuse in place. I only had to run two wires from the body harness connector, up the passenger side A pillar, under the headliner and into the mirror harness.
I purchased the mirror on ebay for $30. It came out of a '14 Buick Regal, but it is the same mirror that is used in the Cruze (according to GM Parts Direct). The part number is 13584891. These cost about $140 new online. A lot of sellers on ebay have used ones for around $60-$80. Sometimes you can find a deal. These mirrors are also used in the Verano, some Cadillacs, and many other GM cars. You can tell if they are the auto dimming mirror if they have a small black circle on the top, center of the mirror, and they have a white square on the back of the mirror. Those are the sensors.
For the headliner to body harness connector (Connector X211)
The wires connect to pins 5 and 6. Pin 5 is the Run/Crank Ignition 1 Voltage. On the '14 Cruze the wire color for pin 5 is Violet/White. Pin 6 is the backup lamp supply voltage. This tells the mirror that you have the car in reverse and it turns off the auto-dimming feature. On the '14 Cruze the wire color for pin 6 is light green/white.
I couldn't find out which terminals I needed for the headliner to body harness connector, and I eventually gave up and just purchased the terminated leads from GM Parts Direct. They are basically just a 6-inch wire with a terminal already crimped to one end. They are way overpriced at $6 each, and I needed 2. The part numbers are 13575805. I would still be interested if anyone knows which terminals are used for this connector.
For the mirror harness (Connector A10)
The wires connect to pins 1 and 2. Pin 1 is the backup lamp supply voltage, and pin 2 is the Run/Crank Ignition 1 Voltage.
You can also get terminated leads for this connector. They are part number 13579944. I purchased the pins in the link below for the mirror harness. I bought 20 of them so that I could do some test crimps and have a few spares in case I screwed up.
http://www.mouser.com/Search/ProductDetail.aspx?qs=XoGB3caz5/Y8PiQ%2bQiK/pQ==
To crimp the terminals, I already had this crimper from another project. It worked perfectly.
https://www.amazon.com/gp/product/B007JLN93S/ref=oh_aui_detailpage_o02_s01?ie=UTF8&psc=1
To get to the body harness, there is a hole in the dash on the right side behind the glove box (you have to remove the glove box to see the hole). There are two plugs inside this hole. The one toward the rear of the car is the one that has the connections for the mirror. I also found that it was easier to unplug this connector by removing the lower door sill trim. This allows you to put your arm under the dash and disconnect the connector while you look through the hole behind the glove box. I disconnected both connectors in this location and then pulled the harness up through a hole behind the a-pillar trim. This made it easy to insert the terminals. Then I ran the wires up the A pillar, under the headliner, and out to the mirror.
I already had the wire and crimper, so total cost was less than $50. It took me a couple hours to install because I went super slow to make sure I had everything right.
A couple months ago I was wondering how hard it would be, so I did a little research. I found out that my '14 Cruze has all of the wiring, except for the wires in the headliner harness. It even had the fuse in place. I only had to run two wires from the body harness connector, up the passenger side A pillar, under the headliner and into the mirror harness.
I purchased the mirror on ebay for $30. It came out of a '14 Buick Regal, but it is the same mirror that is used in the Cruze (according to GM Parts Direct). The part number is 13584891. These cost about $140 new online. A lot of sellers on ebay have used ones for around $60-$80. Sometimes you can find a deal. These mirrors are also used in the Verano, some Cadillacs, and many other GM cars. You can tell if they are the auto dimming mirror if they have a small black circle on the top, center of the mirror, and they have a white square on the back of the mirror. Those are the sensors.
For the headliner to body harness connector (Connector X211)
The wires connect to pins 5 and 6. Pin 5 is the Run/Crank Ignition 1 Voltage. On the '14 Cruze the wire color for pin 5 is Violet/White. Pin 6 is the backup lamp supply voltage. This tells the mirror that you have the car in reverse and it turns off the auto-dimming feature. On the '14 Cruze the wire color for pin 6 is light green/white.
I couldn't find out which terminals I needed for the headliner to body harness connector, and I eventually gave up and just purchased the terminated leads from GM Parts Direct. They are basically just a 6-inch wire with a terminal already crimped to one end. They are way overpriced at $6 each, and I needed 2. The part numbers are 13575805. I would still be interested if anyone knows which terminals are used for this connector.
For the mirror harness (Connector A10)
The wires connect to pins 1 and 2. Pin 1 is the backup lamp supply voltage, and pin 2 is the Run/Crank Ignition 1 Voltage.
You can also get terminated leads for this connector. They are part number 13579944. I purchased the pins in the link below for the mirror harness. I bought 20 of them so that I could do some test crimps and have a few spares in case I screwed up.
http://www.mouser.com/Search/ProductDetail.aspx?qs=XoGB3caz5/Y8PiQ%2bQiK/pQ==
To crimp the terminals, I already had this crimper from another project. It worked perfectly.
https://www.amazon.com/gp/product/B007JLN93S/ref=oh_aui_detailpage_o02_s01?ie=UTF8&psc=1
To get to the body harness, there is a hole in the dash on the right side behind the glove box (you have to remove the glove box to see the hole). There are two plugs inside this hole. The one toward the rear of the car is the one that has the connections for the mirror. I also found that it was easier to unplug this connector by removing the lower door sill trim. This allows you to put your arm under the dash and disconnect the connector while you look through the hole behind the glove box. I disconnected both connectors in this location and then pulled the harness up through a hole behind the a-pillar trim. This made it easy to insert the terminals. Then I ran the wires up the A pillar, under the headliner, and out to the mirror.
I already had the wire and crimper, so total cost was less than $50. It took me a couple hours to install because I went super slow to make sure I had everything right.