INSTALLING THE SWITCHES:
okay, lets start with the heated seat switches. the best and easiest way to go is buy a used radio bezel with the heated seat switches in it. these normally go for around $75 to $100 on ebay. i got lucky. a good friend gave me his silver bezel with switches. i just swapped my heater control panel and non ESP switch to the new bezel.
my original non-heated seat bezel compared to the new heated seat bezel
once you have the radio bezel off, you can dig around behind that bezel for the right heated seat wire harness connector. pull it out from its hidden corner and then look for the left heated seat wire harness connnector. that one is outside of the radio bezel area. it is hanging there just behind the WIN module (ingition switch). i removed the lower dash panel to gain access to that area. once you find that connector, you need to fish it around and to the back of the radio bezel area.
here is where i found the black 8-way connector for the right heated seat switch. it was taped off to the right side of this pocket behind the heater controls.
the left connector is dangling under the dash by the WIN module. locate that black 8-way connector and fish it behind the heater control panel.
once both connectors are behind the heater control panel, you can plug them into the switches.
reinstall the bezel. notice the switches will light up when the headlamps are on. but they will not control the seats just yet. we still have a lot more work to go.
INSTALLING THE MODULE:
okay, next step is remove the passenger seat. there are just two connectors for the seat. unbolt the seat and unplug those connectors. once the seat is out, lift up the front half of the carpet at the seam. the module snaps into the two slots in the floor brace. install the module and plug in your pigtail wire harness for the module. it is a black 6-way connector. i got it from a donor car with about 2' of wire.
SPLICING IN THE MODULE HARNESS:
the heated seat module has one black 6-way connector. you need to splice these wires into the main wire harness that runs along the right rocker panel. remove the carpet sill trim and lift up the carpet to expose the wire loom.
pin (1) black w/white stripe is the ground
pin (2) red w/yellow stripe is the fused B(+)
pin (3) light green w/brown stripe is the left seat heater B (+) driver
pin (4) light green w/violet stripe is the right seat heater B (+) driver
pin (5) white wire is the CAN B (-)
pin (6) white w/orange stripe is the CAN B (+)
tap and splice pins #1, #2, #5, #6 into the main wire loom. just color match them and solder them together. these are the 4 main wires, the two power wires and the two CAN B bus wires. doing this adds another ECU to the CAN B bus and requires programming.
here is what those 4 wires look like tapped into the main loom
ADDING B(+) DRIVE WIRE TO C314 CONNECTOR for RIGHT SEAT:
now you have to wire in the two driver wires for the left and right seat. lets start with pin #4 of the 6-way module connector. this wire is the power wire for the heating pads in the passenger seat. it will connect to the light gray 8-way connector (C314) pin #3 cavity. just loop the light green w/violet stripe from pin #4 of the module to pin #3 of the light gray 8-way connector. it is the cavity above the yellow w/white stripe wire.
now, to get the correct metal pins to add to this C314 connector, you can buy the repair harness from the dealer. it is part #68068651AA. it will come with 8 loose wires and the empty 8-way connector. you will need to use only 2 wires from the kit. one driver wire for each seat.
basically pin #4 of the heated seat module connector to pin #3 of the 8-way passenger seat connector.
here is a picture of that wire added to the 8-way connector
ADDING B(+) DRIVE WIRE TO C313 CONNECTOR for LEFT SEAT:
the drive wire for the left seat is the light green w/brown stripe wire from pin #3 of the black 6-way from the module. you have to lengthen this wire and feed it to the drivers seat area. i splice a length of yellow wire onto the pigtail.
as you can see in this picture, the light green w/brown stripe is taped to the loom and heading toward the rear seat area and back around to the left rocker.
and fish the left seat drive wire to the drivers seat by following the main loom.
now, unbolt and unplug the drivers seat and move it out of the way. you can now finish routing the power driver wire to the left seat area. look at the gray 8-way connector. this is the one you need to add the heated seat B(+) drive wire to pin #3.
here is that C313 gray 8-way connector.
and here a chart that explains each pin on connector C313 (gray 8-way)
continued on the next post................................