On board modem

Reply Subscribe

Thread Tools

Search this Thread

Jan 31, 2020 | 10:09 AM

#16

Bair1218

Thread Starter

Mountain Pass

Joined: Jul 2018

Posts: 105

Likes: 2

So I don't see a white plug but I have this stuff

Attached Images

Jan 31, 2020 | 10:10 AM

#17

J-Wat

Freshman User

Joined: Apr 2019

Posts: 33

Likes: 0

Quote:

Originally Posted by brandon86305

Make sure you have the prewire on the back wall of your truck first by folding down the rear passenger seat and pulling down the rear wall carpet. It will be a 16 pin connector in a white holder if you have it. If it's not pre-wired you will need a PnP harness a guy on a F150 forum makes. The VIN is helpful when activating the hotspot with ATT but it's not necessary as you can find the wrecked trucks VIN by connecting to the hotspot and it will show it on the login screen briefly after you connect. Otherwise yes that is all you need.

Doubtful the 2018 will be prewired. Mine has the power running board module in the spot where the modem would go, on 2019 I believe that module was relocated to the center console area to make room for the modem. The premade harness plugs into the CAN test port connector which is on the passenger side of the center console behind the glove box if you have it at all. Mine did not have it. Harness would not be difficult to make yourself if you are comfortable with wiring, I am making mine to connect to the BCM at the factory spot (Fuse 10) ground at the rear wall, and I haven't made a final decision on where to tap the CAN wires, I will either go up front to the GWM or over to the DSP in the rear. Just a reminder if you make your own connector the CAN wires have to be a twisted pair. Factory size is 22AWG for the CAN and 20 AWG for power and ground.

Jan 31, 2020 | 10:15 AM

#18

J-Wat

Freshman User

Joined: Apr 2019

Posts: 33

Likes: 0

Quote:

Originally Posted by Bair1218

So I don't see a white plug but I have this stuff

Not prewired sorry. The box with the Black and Gray plugs is for the power running boards so that is where the modem would go. The plug you would be looking for would have 4 wires on a black connector. HS3 CAN would be (White/Green, Green/Blue), Power (Yellow/Red), Ground (Black/Violet)

Jan 31, 2020 | 10:18 AM

#19

Bair1218

Thread Starter

Mountain Pass

Joined: Jul 2018

Posts: 105

Likes: 2

So on top of the tcu and 2 antennas i would also need that harness that you said someone makes on the f150 forum? Do you have a link?

Jan 31, 2020 | 10:20 AM

#20

brandon86305

5th Wheeling

Joined: Apr 2013

Posts: 38

Likes: 1

Quote:

Originally Posted by Bair1218

So on top of the tcu and 2 antennas i would also need that harness that you said someone makes on the f150 forum? Do you have a link?

The first post here has all the harness info for you:
https://www.f150forum.com/f118/sync-...y-ford-452708/

Jan 31, 2020 | 10:28 AM

#21

J-Wat

Freshman User

Joined: Apr 2019

Posts: 33

Likes: 0

Quote:

Originally Posted by brandon86305

The first post here has all the harness info for you:
https://www.f150forum.com/f118/sync-...y-ford-452708/

Be sure you have the CAN test port as that is what the harness is designed to plug into. You more than likely do not as we have the same year model and mine did not. It is a gray 4 pin plug behind the glovebox on the center console side. He may have figured out another option for those that don't have it by now but be sure to ask when you order.

Jan 31, 2020 | 10:35 AM

#22

Bair1218

Thread Starter

Mountain Pass

Joined: Jul 2018

Posts: 105

Likes: 2

Ok. Thanks for the heads up. I purchased the link you sent me from eBay. So at least I have the part. How did you get yours to work without the plug?

Jan 31, 2020 | 10:47 AM

#23

J-Wat

Freshman User

Joined: Apr 2019

Posts: 33

Likes: 0

Quote:

Originally Posted by Bair1218

Ok. Thanks for the heads up. I purchased the link you sent me from eBay. So at least I have the part. How did you get yours to work without the plug?

I have not installed mine yet but am building my own harness. All you have to do is tie into the HS3 CAN network somewhere and it will work. Mine will most likely end up as a wire added to the DSP plug but this requires crimping a new pin on the wire. There are plenty of other devices on that network but the DSP is closest. It runs from the GWM to the IPC, APIM, ACM, and a few more. Double check and see if you have the test port plug, it is on the wiring diagram for 2018 but mine did not have it.

FTE Stories

Ford Trucks for Ford Truck Enthusiasts

10 Ways Ford is LOSING to the Competition

Joe Kucinski

Top 6 Best Deals Available on New Fords & Lincolns Right Now

Brett Foote

This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level

Verdad Gallardo

Top 10 Fords at 2026 Carlisle Ford Nationals

Joe Kucinski

3 Best / 3 Worst Parts of Modern Ford Ownership

Brett Foote

10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

Pouria Savadkouei

Every 2026 Ford Engine Explained

Brett Foote

10 Ugly Ford Trucks That We Still Kinda Love

Joe Kucinski

10 Things Every Truck Owner NEEDS (2026 Edition)

Michael S. Palmer

Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

Verdad Gallardo

Jan 31, 2020 | 10:51 AM

#24

Bair1218

Thread Starter

Mountain Pass

Joined: Jul 2018

Posts: 105

Likes: 2

Ok I'll look in a few. And that's the plug that would be behind the glove box. Correct?

Jan 31, 2020 | 10:58 AM

#25

Bair1218

Thread Starter

Mountain Pass

Joined: Jul 2018

Posts: 105

Likes: 2

This is what I have behind the glovebox

Jan 31, 2020 | 10:59 AM

#26

Bair1218

Thread Starter

Mountain Pass

Joined: Jul 2018

Posts: 105

Likes: 2

Here they are

Attached Images

Jan 31, 2020 | 11:16 AM

#27

J-Wat

Freshman User

Joined: Apr 2019

Posts: 33

Likes: 0

Quote:

Originally Posted by Bair1218

Here they are

Nope, it would be attached to that rusty plate on top of the first pic with the oval and circle holes punched in it.

Jan 31, 2020 | 11:17 AM

#28

Bair1218

Thread Starter

Mountain Pass

Joined: Jul 2018

Posts: 105

Likes: 2

Ugh that sucks!

Jan 31, 2020 | 11:33 AM

#29

J-Wat

Freshman User

Joined: Apr 2019

Posts: 33

Likes: 0

Quote:

Originally Posted by Bair1218

Ugh that sucks!

Agreed, I was hoping mine would have been prewired as well especially when the wiring diagram says it should be there. Check on the pre made harness anyway, he might have figured out a solution for those without the test connector as well.