2004 Mazda3: Homelink Electrochromic Mirror Installation

These instructions apply to a 2004 Mazda3 5-door, but are easily transferable to any model/year of Mazda3.



The Procedure

Remove Driver's Side Scuff Plate and Kick Panel
 
  There are little clips that hold the trim in place. Carefully pry the whole thing upwards and it'll just pop out. Use a trim panel tool if you have one, but a screwdriver will work just as well. For the kick panel (trim to the left of the clutch pedal), there's just one plastic fastener to remove and then it just pops off. To remove the plastic fastener, insert your small flat-blade screwdriver under the center section to pry it up. Once the center section is unlocked, pull the fastener out.

 

Partially Remove Door Weatherstripping
 
  Just grab it and gently pull it away from the chassis. You only need to remove enough of it to access the a-pillar trim and the driver's side kick panel.

 

Remove Driver's Side A-Pillar Trim
 
  The lower and middle fasteners will just pop loose as you pry the trim toward the passenger's side of the car. The upper fastener will not pop loose if you just pull on it. You need to loosen the lower two fasteners and then slide the whole thing along the A-pillar toward the roof to clear the upper fastener. Be careful of the side air curtain if you have one - don't poke a hole in it or move anything in its way.

 

Remove Plastic Cover Near Airbox
 
  There's a little plastic cover held in place by three plastic screw-type fasteners as shown in the picture. Remove the fasteners by unscrewing the center section and then prying the rest of the fastener out of the hole. The reason for removing this panel is so you have access to where you need to run the wires for the temperature sensor.

 

Remove OEM Mirror
 
  There's a little tab on the bottom that clips it into place - lift the tab and push the whole assembly upwards. Mine was a little stuck, so I used a screwdriver and a rubber mallet to carefully tap the mirror free while I held the tab up. That worked ok, but be careful not to get carried away with the mallet!

 

Install Mirror
 
  It slides right on and then is secured with an #20 Torx (star) screw. Tightening torque is 1.3 ft*lbs, so "barely snug" should do.

 

Route Temperature Sensor Toward Radiator
 
  Thread the temperature sensor through the area shown so that you can get it near the front of the radiator. Hang on to the other end of the wire so it doesn't all fall down there!

 

Secure Temperature Sensor To Grill
 
  Clip it onto the grill as shown. Wiggle it around to make sure it's securely attach and won't be blown off by wind.

 

Secure Wiring Near Radiator
 
  Use a couple of zip ties (provided by Mazda) to secure the wiring as you run it up near the radiator and toward the fuse box.

 

Route Wire Along Fender
 
  Route the wire along the left fender near the fuse box, securing it with a zip tie to the large black ground cable near the upper strut mounting bolts.

 

Replace Trim Panel
 
  Replace the trim panel you removed earlier. Snap the base of the fastener into the hole and then screw in the center section.

 

Disengage Hood Latch Cable
 
  Remove the cable from the latch, and be careful that the hood doesn't close!

 

Secure Hood Latch In Unlocked Position
 
  Just to be sure that the hood can't be locked while you have the cable disconnected, move the latch to the unlocked (release) position and zip-tie it there. If the hood closes while you have the cable removed, that would be bad. Very bad.

 

Remove Hood Latch Cable From Clips
 
  There are several little clips that hold the hood cable; one is near where the stripe on the cable in the picture is. You'll need to allow some slack in the cable for future steps, so remove the cable from the clips. It just slides out.

 

Pull Hood Release Cable Into Interior
 
  Follow the cable from the lever up to the firewall and loosen it from the rubber grommet up there. Wiggle it around and it should come free pretty easily. Pull the grommet out, too.

 

Attach Sensor Wires to Fish Tape
 
  If you don't have a fish wire or special tool, a metal coat hanger or a piece of stiff wire will do. Make a loop in the end of the temperature sensor wires and secure it with electrical wire. Then thread the fish wire (or coat hanger with a hook on the end) through the firewall gromet for the hood release cable, starting from the interior of the car. Then hook the wire loop around the hook in the fish wire and pull the wires back into the interior of the car.

 

Pull Most of Sensor Wire Slack Into Interior
 
  Now that you have the sensor wiring through the firewall, pull almost all of the slack into the interior and secure the wire loom to its final position in the engine bay.

 

Reattach Hood Release Cable
 
  Cut the zip tie you put on the hood latch and reattach the cable. Test that the latch/cable works before you shut the hood! After running the wires for the temperature sensor through the grommet, shove the gromet and retainer back up against the firewall where they were originally.

 

Attach Temperature Sensor Wires To Harness
 
  Slightly lift up the white locking tab in the harness so you can add in the new wires. Attach the temperature sensor wires that you just pulled through the firewall to the temperature sensor harness in the positions shown in the instructions. As the harness is shown in the picture, they go in the lower left two holes. Polarity doesn't matter. Press the white locking tab on the harness back down to lock the wires in.

 

Unwrap Wiring Bundle
 
  There is a large wiring bundle behind the driver's side kick panel, and you need to access two of these wires. Cut and unwrap the electrical tape in a convenient place to gain access to the wires.

 

Locate Orange Wire with Black Stripe
 
  Note!! If your instructions say to use the black wire with the orange stripe, DO NOT LISTEN TO THEM. There is a type in the instructions, and I confirmed this by contacting Homelink directly. If you use the black/orange wire instead of the orange/black wire, your Homelink buttons will not work. I have reported this to Mazdastuff.com, and they said they would make sure that future instructions shipped with these mirrors had the correct wire listed.

Locate the Orange wire with the Black Stripe and attach one of the provided T-taps to the wire. Just place the wire in the groove in the metal part, close the plastic part over it, and press. Sometimes I'll use a pair of pliers to make it easier to pinch the halves of the plastic part together.

 

Check For Voltage [optional]
 
  The Orange/Black wire should be constant battery voltage (about 12V), so if you have a multimeter handy, go ahead and check the voltage.

 

Locate Orange Wire With Yellow Stripe
 
  Attach the other T-tap to this wire just like you did for the other one. This is an ignition circuit wire, so there should be 12V at this wire when the key is in the "ON" position and it should be 0V when the key is in the "ACC" or "OFF" positions.

 

Attach Grounding Ring to Grounding Screw
 
  One of the wires on the harness for the mirror has a ring terminal on it. This is the ground wire, and it needs to be attached to a secure chassis ground. Luckily, there just happens to be a grounding screw right in the general area you're already in. Unscrew the 10mm bolt and attach the ring terminal.

 

Attach Harness Power Wires
 
  The Black wire with the White Stripe on the mirror harness should be connected to the Orange wire with the Yellow Stripe in the factory bundle. The Black wire (no stripe) on the mirror harness should be connected to the Orange wire with the Black Stripe in the factory bundle.

 

Attach Harness To Mirror
 
  It should just snap right in to the hole in the rear of the mirror. Stuff the wires up under the headliner above the mirror.

 

Route And Cover Wires, Part I
 
  Gently pull down on the headliner and stuff the wires up under it. Also attach the plastic trim piece to the mirror mount and make sure its prongs extend up under the headliner.

 

Route Wires, Part II
 
  Route the wires down the A-pillar, making sure you don't get in the way of the side air curtains if you have them. Secure the wires with the provided zip ties. Extend the wires down along the side of the dash, in the area that will be under the weatherstripping when it is reattached.

 

Replace Weatherstripping and Secure Wires
 
  Just push the weatherstripping back into place. Secure the new wires in place with the provided zip ties.

 

Test Mirror Function
 
  Reconnect the negative terminal of the battery. Turn the ignition switch to "ON". Make sure that the green LED to the left of the center switch is on. If it's not on, push the mirror's power button to make it so. In a well-lit area, place your hand over the photo sensor on the front of the mirror. Within a few seconds, the mirror should darken. Remove your hand from in front of the photo sensor, and the mirror should clear within a few seconds. Now press any of the homelink buttons and make sure that a red LED lights up in the same location as the green LED. If you're in really bright light, you may need to turn the green LED off (by pushing the mirror's power button) in order to see the red LED. Finally, you'll need to drive your car in a circle a couple times very slowly (under 5mph) to calibrate the compass. See the mirror's directions for getting the correct magnetic zone if you like.

 

Replace Kick Panel and Scuff Plate
  Put them back on in the reverse of how you took them off. the new wires in place with the provided zip ties.

 

Set Up Homelink Functions
  You can get the instructions on the Homelink Website, and they're slightly different for different manufacturers of garage door openers and home automation equipment.

 




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Last Modified Fri Jun 04 2004 17:32:44 Pacific Daylight Time