How To Use AlfaOBD On 2025+

[kraz]

Question:
If we install the new lights using your harness and update the settings in AlfaOBD, will the lights function properly until we are able to visit the dealer for the proxy alignment?
I understand there may be multiple warning lights on the dashboard during that time. I just want to make sure they’ll at least function until I can get to the dealer, just in case.

 

[Jimmy07]

Question:
If we install the new lights using your harness and update the settings in AlfaOBD, will the lights function properly until we are able to visit the dealer for the proxy alignment?
I understand there may be multiple warning lights on the dashboard during that time. I just want to make sure they’ll at least function until I can get to the dealer, just in case.

Yes, they’ll function correctly before proxy alignment.

 

[Grady247]

This is great but a little beyond my capabilities. I'll have to wait for the simplified version to come out.

 

[RAMTEXAS]

@Jimmy07 is it possible to retrofit the prior LED tail lamps? the ones that had amber turn signals.

 

[Jimmy07]

I’m hoping so. I intend to find out, because all of the 2025+ tail lights are ugly.

 

[Jimmy07]

@Jimmy07 is it possible to retrofit the prior LED tail lamps? the ones that had amber turn signals.

I’m hoping so. I intend to find out, because all of the 2025+ tail lights are ugly.

Just realized this will be a bit tricky. The 2025’s use combined rear lighting (one circuit for brake and turn lamps). The pre-2025 tails use separate circuits for turn and brake lamps.
I’ll have to grab the turn signal circuits from the trailer plug, and also build some type of switchback module so the brake light drops out when the turn signal is being used, all while making sure the BCM thinks brake/turn signal circuit is being used normally.
It’s possible that the trailer tow module will think a trailer is connected, and pop up the trailer blind spot selection, so I’ll have to see if that happens and what to do about it.

 

[RAMTEXAS]

all of the 2025+ tail lights are ugly

agreed!

 

[Jimmy07]

@turbom5 had info that witech released an update that would make the aftermarket pass through devices work again, and asked me to try.
I can confirm that we can connect to witech and do a proxy alignment using the RLINK j2534 X7. You need a one month VIN subscription, and a 3 day tech authority subscription to be able to do this (more info on that in post #5).

 

[MotorcycleBoy]

A few years ago, I bought this OBDII ELM interface (see photo) for my Yamaha yz450.
I always used it only to see errors and now I'd like to see errors of my RAM Rebel X my2025, but after connecting with my smartphone and the OBD app, the program's response is "vehicle NOT connected".

Perhaps the OBD socket of the RAM my2025 is protected by Stellantis ?
Thanks

Sent by SM-F766B on Tapatalk

 

[Glvnet]

@turbom5 had info that witech released an update that would make the aftermarket pass through devices work again, and asked me to try.
I can confirm that we can connect to witech and do a proxy alignment using the RLINK j2534 X7. You need a one month VIN subscription, and a 3 day tech authority subscription to be able to do this (more info on that in post #5).

Good afternoon @Jimmy07. Thank you for the great write up. I have a 2025 Big Horn RWD with the 8.4 radio. I have used Witech 2.0 VIN monthly subscription with the 3 day techauthority along with the Topdon Rlink J2534 without issues.

Amazon.com

I will try Alfaobd tomorrow when I get the OBD2 Splitter I just ordered. I also have an Otofix IM1 Scanner (essentially an Autel) that I will use to test if it can keep Secure Gateway open thru Autoauth.

I have a question Jimmy07, when doing the Proxy Config. Alignment is there any specific ECUs I need to select? I saw the screenshots and it looks like on one screen you selected DDM and in the next DTCM.

Thank you!

These are the ECUs my BigHorn Trim has:

 

[Jimmy07]

Good afternoon @Jimmy07. Thank you for the great write up. I have a 2025 Big Horn RWD with the 8.4 radio. I have used Witech 2.0 VIN monthly subscription with the 3 day techauthority along with the Topdon Rlink J2534 without issues.

Amazon.com

I will try it again tomorrow when I get the OBD2 Splitter I just ordered. I also have an Otofix IM1 Scanner (essentially an Autel) that I will use to test if it can keep Secure Gateway open thru Autoauth.

I have a question Jimmy07, when doing the Proxy Config. Alignment is there any specific ECUs I need to select? I saw the screenshots and it looks like on one screen you selected DDM and in the next DTCM.

Thank you!

These are the ECUs my BigHorn Trim has:

View attachment 211147

That might have just been how I had the mouse hovering when I took the screenshot.
Don’t select any modules. Just go to guided diagnostics, proxy configuration alignment, and keep selecting continue, following the instructions along the way. It will ultimately automatically align every module that needs it.

 

[Glvnet]

That might have just been how I had the mouse hovering when I took the screenshot.
Don’t select any modules. Just go to guided diagnostics, proxy configuration alignment, and keep selecting continue, following the instructions along the way. It will ultimately automatically align every module that needs it.

Thank you Sir. Much appreciated!!

 

[Cbty2050]

@turbom5 had info that witech released an update that would make the aftermarket pass through devices work again, and asked me to try.
I can confirm that we can connect to witech and do a proxy alignment using the RLINK j2534 X7. You need a one month VIN subscription, and a 3 day tech authority subscription to be able to do this (more info on that in post #5).

This is great news, we have sent out a couple programming events to the dealer to get done because of the witech issues.

 

[turbom5]

Looking to do the following changes (coding) with AlfaOBD. If anyone has any insight please advise and if not it gives you some ideas:

BODY COMPUTER:
-> Car configuration change:
--> STOP& START = NOT PRESENT (DISABLING START STOP)
--> DAY RUNNING LIGHT (DRL) = ABSENT (DISABLING ALWAYS ON LIGHTS) *CANADA
--> DRL TURN LIGHT STRATEGY/DRL DROP OUT - ABSENT (STOPS TURNING OFF HEADLIGHT WHILE SIGNAL BLINKS)
--> TPMS (ABSENT) - USEFUL IF WINTER TIRES WITHOUT TPMS OR OTHER, LIKE ME WHO HAS A REBEL AND WANTS TO RUN LESS THAN 55PSI ON NON FACTORY TIRES AND WHEELS TO GET RID OF WARNING, UNLESS SOMEONE KNOWS HOW TO PROGRAM A LOWER TIRE PRESSURE TO THE TPMS SYSTEM)
-->TPMS CONFIGURATION - NAFTA DISABLE WARNING
--> NOT COMPASS: TIRE CIRCUMFERENCE, MM - TO SET A LARGER TIRE SIZE THAT I HAVE SO THE TRANSMISSION SHIFTS CORRECTLY AND SPEEDOMETER IS ACCURATE
--> SECOND BATTERY TYPE - NONE (GOOD FOR REMOVING AUX BATTERY LIKE I DID INSTEAD OF PULLING FUSE F52)
--> DRL LAMP LOCATION - NONE (GOOD IF YOU WANT TO SPECIFY THE DRLS) - WOULD LOVE TO HAVE DRL OPTION TO CHOOSE ON OR OFF AND THEN THIS SETTING CAN CHOOSE WHAT IS THE DRL
--> FRONT PARKING LIGHTS TYPE (LEDS) - I CHANGED FROM HALOGEN TO LED ON STANDARD 2025+ LIGHTS AND THINK THIS MIGHT ALLOW FOR NON CANBUS READY BULBS
--> REVERSE LIGHTS TYPE - LEDS (SAME AS ABOVE)
--> REAR LIGHTS DIAGNOSIS (ABSENT) - HOPEFULLY REMOVES LIGHT ERRORS FROM SOME LED BULBS, EVEN THOUGH I AM RUNNING ALL AUXLIGHT LED CANBUS BULBS I CAN FINDING AN ERROR INTERNALLY WHILE SCANNING WITH XTOOL THAT SHOWS REAR TAIL LIGHTS BULB ISSUE.
--> UNINTENDED IDLE ALERT PRESENCE (THIS WOULD REMOVE THE MOST ANNOYING TRIPLE HONK AT EXIT WITH TRUCK RUNNING.)
--> KEY-IN WARNING - ABSENT (HOPEFULLY REMOVES THE ANNOYING BEEPING WITH DOOR OPEN AND TRUCK RUNNING)
--> DRIVER BUCKLE SWITCH - ABSENT (HOPEFULLY REMOVES SEATBELT WARNING
--> SEAT BELT REMINDER (SBR) UNIT PRESENT - ABSENT - SAME AS ABOVE
--> SPEED LIMITER THRESHOLD (I BELIEVE THIS SHOULD NOT BE MODIFIED AS @Jimmy07 ADVISED (THE GURU) IN ANOTHER THREAD TO NEVER MODIFY THE SPEED LIMITER IN BCM BUT IT HAS TO BE DONE IN PCM. )
--> BAMBI MODE?? - DIDNT SEE OPTION TO DISABLE FOG LIGHT DROP OUT FOR HIGH BEAMS.

What I didnt find and was interested in was TPMS adjust pressure setting (REBEL trim is set to 55psi all around which is absurd for an empty truck especially when you change the wheels and tires)


For the cost of buying everything and paying for the sub and doing it at home to avoid dealer issues with my modified truck, I am thinking this list gives me enough to justify the cost. However, I wish we had more customization.

Disabling auto start stop alone is worth it along with the annoying triple honk, key in ignition and ideally being able to change tire pressure and circumference and enable option to turn DRL off in trucks without that option (Canada).

Any information and advice on this please share ! Thank you everyone and special thanks to @Jimmy07 for making this a reality for us on the Atlantis CAN-FD system.