NC GTier
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- Jun 27, 2019
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- North Carolina
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- Haider
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- 2018 Mustang 5.0 Conv Auto Silver
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Disclaimer: The below assumes some knowledge of wiring/assembly/safety/etc. It is written to the best of my knowledge and what worked for me. I am not responsible for any damage caused by following the steps below or any consequences. That's said, I have done the below on my cars and it worked.
Rule of thump: for any module to function, it needs four main wires: 1) hot, 2) ground, 3) Can bus +, and 4) Can bus -.
So the below is based on reviewing the electrical diagrams and lists the steps in order to route all these four wires to the H/C module.
If you think the below is too much trouble, I also build the custom harness and sell it for $300. It comes with my installation support.
Worth mentioning, there has been a change in the wiring between 2017 and 2018. The H/C module was relocated from under the passenger seat in 2015-2017, to be combined (one black box) with the memory module under the driver seat (DSM - Driver Seat Module) in 2018+. That's said, the below will only explain how the H/C function will be enabled, and nothing about the memory function.
Please note, this modification assumes, you already swapped your base 4" small screen to the premium 8" screen with stock parts (screen and bezel), and that the bezel has the buttons for the H/C. Otherwise the H/C will not work. Also obviously you swapped your base cloth seats to premium leather seats (also stock).
What do you need?
1- two pigtails WPT-1279 available on ebay and Amazon, nothing expensive.
2- wires (a spool). I used wires gauge 14 for everything to be safe (only 4 wires needed to be 14 and the rest were less thickness), but I went with the thicker wires because that's what I had.
3- electrical connecting butts or any method to connect two wires securely. I also solder, to ensure strong connectivity and durability.
4- shrink wrap tubes and conduit wherever needed.
Premium leather seats come with two connectors in each. One (bigger size) plugs into the existing floor connector, and one (smaller size) that is extra and doesn't have a floor connector to plug into (in the base models). That's where the two pigtails will plug into (after building the harness). In fact, the harness you will build, will go straight from one seat to the other.
Each pigtail comes with about 1 foot of wire attached to each pin (16 pins total). What you need to do is extend this 1 foot wire by 6 ft and connect to the other pigtail. Pin 1 to Pin 1, Pin 2 to Pin 2 and so forth. The pin numbers are written very tiny near the edge pins. Be careful not to cross wires to the wrong pins.
Pins that are NOT used (you can remove them from the connector or just cut the wires in the back of the connector):
For years 2015/2016/2017: pin 11 and pin 14.
For years 2018+: pins 6, 11, 12, 13, 14.
After you're done, put your shrink wrap and conduit etc. Your easy part is complete.
Now that you have built your harness, you can go ahead and feed it from one side to the other under the carpet and under the center consol. You will need to pop the center console cover to pull the harness from one side to the other. To pull the cover, there are two 8mm screws on each side in the front hidden by a plastic cover, which you can pull by hands.
After you route the harness, be careful not to let your harness interfere with the emergency brake handle. Keep it away from the handle with zip ties or tucked away from it.
We will now move to second step. Feeding the hot/ground/MS CAN+ and MS CAN-
For 2015-2017 models with power seats (driver and passenger):
The H/C module is under the passenger seat (gray box). It takes its hot/ground from the existing floor connector. That connector for base models already has a ground shared between the power seat and the HC module (Pin # 8 Black/white wire). So nothing to do for ground.
For hot, it is not there, and you need to add it. There are many ways to do this, but I will only mention the easy lazy way. I just use the existing hot that feeds the power seat and combine it to use for H/C. In my opinion it is capable and doesn't blow the seat fuse even with both heats on and both seats moving. Pics below shows you two ways to do it. I prefer the bridging way. This is done in the seat connector, not the floor connector. That takes care of the hot.
For 2015-2017 models WITHOUT power passenger seat or recaros:
You will need to pull a hot and ground from the passenger side kick panel. There is a connector that has these two wires with nothing on the other side, they are in fact routed there to use for H/C if the car was equipped with that. Be creative how to pull these two wires and route them to the seat.
For 2018+ with power driver seat:
You will need to do the same as above but for both, hot and ground, because the ground in the driver floor connector is not shared/routed to the H/C module. You can follow the bridge method on the driver seat connector. See pic above for hot, and pic below for ground. Again, this is the seat connector, not the floor connector. The pic shows both black wires bridged, and both green and violet wires bridged in the driver seat connector. Nothing to do with passenger side. Please use solder if possible to ensure strong connection.
For 2018+ with recaros or WITHOUT driver power sear:
You will need to access a connector by the driver side kick panel that has both ground and hot available to use (nothing on the other side of the connector), feel free how you want to tap these two wires and get them to the seat connector.
All models:
Now that hot/ground is there, will work on MS CAN + and MS CAN - (data lines):
There are different places in the car to pull the data lines from, but I choose behind the OBD (gateway module) connector. Relatively easy to access and close to the driver seat. The OBD module has a connector plugged into the back of it, you will need to unplug it and look for two wires: VDB06 (pin 23 Gray) CAN + and VDB07 (pin 22 Violet) is CAN-.
You need to tap into each one and feed these wires to the driver seat connector. I have to warn you, these wires are super thin and easy to cut. If that happens, just put a connecting butt and add your wires. Soldering recommended.
At the driver seat:
For 2015-2017:
The above two wires will tap into the harness you built. Pins 12 and pin 13.
the Gray goes to pin 12 and violet goes to pin 13
For 2018+:
The above two wires will need to route to your seat (big) harness. Gray to Gray/Orange, and Violet to Violet/Orange.
Once you're done, you will be able to test everything. Your engine must be running when you test.
No forcan or programming needed unless you want to add the buttons on your screen.
ENJOY!
View attachment 404259
Rule of thump: for any module to function, it needs four main wires: 1) hot, 2) ground, 3) Can bus +, and 4) Can bus -.
So the below is based on reviewing the electrical diagrams and lists the steps in order to route all these four wires to the H/C module.
If you think the below is too much trouble, I also build the custom harness and sell it for $300. It comes with my installation support.
Worth mentioning, there has been a change in the wiring between 2017 and 2018. The H/C module was relocated from under the passenger seat in 2015-2017, to be combined (one black box) with the memory module under the driver seat (DSM - Driver Seat Module) in 2018+. That's said, the below will only explain how the H/C function will be enabled, and nothing about the memory function.
Please note, this modification assumes, you already swapped your base 4" small screen to the premium 8" screen with stock parts (screen and bezel), and that the bezel has the buttons for the H/C. Otherwise the H/C will not work. Also obviously you swapped your base cloth seats to premium leather seats (also stock).
What do you need?
1- two pigtails WPT-1279 available on ebay and Amazon, nothing expensive.
2- wires (a spool). I used wires gauge 14 for everything to be safe (only 4 wires needed to be 14 and the rest were less thickness), but I went with the thicker wires because that's what I had.
3- electrical connecting butts or any method to connect two wires securely. I also solder, to ensure strong connectivity and durability.
4- shrink wrap tubes and conduit wherever needed.
Premium leather seats come with two connectors in each. One (bigger size) plugs into the existing floor connector, and one (smaller size) that is extra and doesn't have a floor connector to plug into (in the base models). That's where the two pigtails will plug into (after building the harness). In fact, the harness you will build, will go straight from one seat to the other.
Each pigtail comes with about 1 foot of wire attached to each pin (16 pins total). What you need to do is extend this 1 foot wire by 6 ft and connect to the other pigtail. Pin 1 to Pin 1, Pin 2 to Pin 2 and so forth. The pin numbers are written very tiny near the edge pins. Be careful not to cross wires to the wrong pins.
Pins that are NOT used (you can remove them from the connector or just cut the wires in the back of the connector):
For years 2015/2016/2017: pin 11 and pin 14.
For years 2018+: pins 6, 11, 12, 13, 14.
After you're done, put your shrink wrap and conduit etc. Your easy part is complete.
Now that you have built your harness, you can go ahead and feed it from one side to the other under the carpet and under the center consol. You will need to pop the center console cover to pull the harness from one side to the other. To pull the cover, there are two 8mm screws on each side in the front hidden by a plastic cover, which you can pull by hands.
After you route the harness, be careful not to let your harness interfere with the emergency brake handle. Keep it away from the handle with zip ties or tucked away from it.
We will now move to second step. Feeding the hot/ground/MS CAN+ and MS CAN-
For 2015-2017 models with power seats (driver and passenger):
The H/C module is under the passenger seat (gray box). It takes its hot/ground from the existing floor connector. That connector for base models already has a ground shared between the power seat and the HC module (Pin # 8 Black/white wire). So nothing to do for ground.
For hot, it is not there, and you need to add it. There are many ways to do this, but I will only mention the easy lazy way. I just use the existing hot that feeds the power seat and combine it to use for H/C. In my opinion it is capable and doesn't blow the seat fuse even with both heats on and both seats moving. Pics below shows you two ways to do it. I prefer the bridging way. This is done in the seat connector, not the floor connector. That takes care of the hot.
For 2015-2017 models WITHOUT power passenger seat or recaros:
You will need to pull a hot and ground from the passenger side kick panel. There is a connector that has these two wires with nothing on the other side, they are in fact routed there to use for H/C if the car was equipped with that. Be creative how to pull these two wires and route them to the seat.
For 2018+ with power driver seat:
You will need to do the same as above but for both, hot and ground, because the ground in the driver floor connector is not shared/routed to the H/C module. You can follow the bridge method on the driver seat connector. See pic above for hot, and pic below for ground. Again, this is the seat connector, not the floor connector. The pic shows both black wires bridged, and both green and violet wires bridged in the driver seat connector. Nothing to do with passenger side. Please use solder if possible to ensure strong connection.
For 2018+ with recaros or WITHOUT driver power sear:
You will need to access a connector by the driver side kick panel that has both ground and hot available to use (nothing on the other side of the connector), feel free how you want to tap these two wires and get them to the seat connector.
All models:
Now that hot/ground is there, will work on MS CAN + and MS CAN - (data lines):
There are different places in the car to pull the data lines from, but I choose behind the OBD (gateway module) connector. Relatively easy to access and close to the driver seat. The OBD module has a connector plugged into the back of it, you will need to unplug it and look for two wires: VDB06 (pin 23 Gray) CAN + and VDB07 (pin 22 Violet) is CAN-.
You need to tap into each one and feed these wires to the driver seat connector. I have to warn you, these wires are super thin and easy to cut. If that happens, just put a connecting butt and add your wires. Soldering recommended.
At the driver seat:
For 2015-2017:
The above two wires will tap into the harness you built. Pins 12 and pin 13.
the Gray goes to pin 12 and violet goes to pin 13
For 2018+:
The above two wires will need to route to your seat (big) harness. Gray to Gray/Orange, and Violet to Violet/Orange.
Once you're done, you will be able to test everything. Your engine must be running when you test.
No forcan or programming needed unless you want to add the buttons on your screen.
ENJOY!
Sponsored
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