Alfa OBD Success! - Page 3 - Dodge Cummins Diesel Forum
2013-2018 General Discussion General Chit Chat About the 2013 model year differences 6.7L 4th generation Cummins - NO ADVERTISING - Sponsored by: StarLite Diesel

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post #25 of 480 (permalink) Old 01-18-2019, 09:47 AM
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^Great videos and thank you for illustrating! I can't wait to get my OBD Link MX and do these changes in the BCM "properly" so I don't have to run resistors/capacitors
My pleasure.

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post #26 of 480 (permalink) Old 01-18-2019, 11:48 AM
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Its also available in "program Customer Options"-"tire size". I was not able to get any of the pre programmed sizes to work, but I did the math and plugged in the circumference in MM and it took just fine.
This is the route i took. My tires are 33.86" tall according to Nitto's web site. I did the math and came out with 2565.51 mm. I plugged that into the "program tire size" box and now my speedo doesn't work. I am getting error code u1412. I tried putting it back to the stock size but it won't let me change it.

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post #27 of 480 (permalink) Old 01-18-2019, 12:05 PM
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I don't think it will accept a decimal it has to be a whole number.

SteveB 2015 3500 DRW Tradesman CC
2001.5 3500 2WD QC, ETH/DEE,SOLD-8/2015
1996 1500 4X4 RC/SB 318/AT SOLD-8/2010
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post #28 of 480 (permalink) Old 01-18-2019, 12:30 PM
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This is the route i took. My tires are 33.86" tall according to Nitto's web site. I did the math and came out with 2565.51 mm. I plugged that into the "program tire size" box and now my speedo doesn't work. I am getting error code u1412. I tried putting it back to the stock size but it won't let me change it.
You may have to connect to the abs module and clear that fault first. Possibly perform abs initialization. Then re-do the tire size with no decimals.
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post #29 of 480 (permalink) Old 01-18-2019, 01:17 PM
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It doesn't NECESSARILY mean you'll get a bulb out warning or have a circuit shut down, although you 100% CAN have that happen! For example, fogs and reverse lights seem to not generate any warnings. LED License Plate bulbs can. Interesting indeed!
It will depend on the load from the particular LED you are using. Even if you do not get bulb out in the first 10 min of driving it does not mean it will stay reliable. It can take days weeks before the lights start acting goofy. Inserting a .33ohm resistor is enough to make ALL Leds reliable with PWM turned on. A capacitor does a similar thing. A capacitor is actually a reactive load to an AC signal. I however would recommend turning PWM OFF if you are running LEDs. The silicon that make up an LED were not designed to switch on/off that fast. Giving them a clean DC signal should make them last longer.

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- Set mirrors to tow mirrors
What does that do?

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This is the current Known Working List
Seems the need to update that for HID and the speedo calibration
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post #30 of 480 (permalink) Old 01-18-2019, 01:23 PM
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Yep, had to clear the abs faults then do the abs initialization sequence. It didn't take the 1st time I did it. The 2nd time was the kicker. Now to try and get the drl"s to work. I followed the procedure that someone posted above but they still don't work. Thanks for the help

So far I have:
Changed low beam/high beam & fogs to led
Activated dogs on with high beams
Global down
Tire size
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post #31 of 480 (permalink) Old 01-18-2019, 01:25 PM
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Dogs? That would be a neat trick
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post #32 of 480 (permalink) Old 01-18-2019, 01:26 PM
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So far I have:
Changed low beam/high beam & fogs to led
You should set the low beam to HID. Setting it to LED doesn't shut the PWM off.
https://www.cumminsforum.com/forum/2...-alphaobd.html
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post #33 of 480 (permalink) Old 01-18-2019, 01:31 PM
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I will do that. Another question, I am monitoring my egt's on the graph. Is there a way to change it to f from c? I looked in tools and preferences but didn't see anywhere to change it

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post #34 of 480 (permalink) Old 01-18-2019, 05:04 PM
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Originally Posted by Show Killer View Post
Yep, had to clear the abs faults then do the abs initialization sequence. It didn't take the 1st time I did it. The 2nd time was the kicker. Now to try and get the drl"s to work. I followed the procedure that someone posted above but they still don't work. Thanks for the help

So far I have:
Changed low beam/high beam & fogs to led
Activated dogs on with high beams
Global down
Tire size
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Dogs? That would be a neat trick
That would be a meat trick.

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post #35 of 480 (permalink) Old 01-18-2019, 05:07 PM
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It will depend on the load from the particular LED you are using. Even if you do not get bulb out in the first 10 min of driving it does not mean it will stay reliable. It can take days weeks before the lights start acting goofy. Inserting a .33ohm resistor is enough to make ALL Leds reliable with PWM turned on. A capacitor does a similar thing. A capacitor is actually a reactive load to an AC signal. I however would recommend turning PWM OFF if you are running LEDs. The silicon that make up an LED were not designed to switch on/off that fast. Giving them a clean DC signal should make them last longer.
I just ordered Mopar LED tails and the Retroshop adapters, but I want to add 7440 white LED bulbs in my reverse lights - the brand I used elsewhere on the truck are all Canbus error free bulbs, but on these reverse bulbs it doesnt specifically say it in the listing, except "polarity free" which historically means they are a Canbus bulb -

It only mentioned in the listing you'd need a resistor if using the bulbs in a turn signal application which makes sense - do you think I'd be ok running these in the LED tails with the Retroshop harness until I get my AlfaOBD running?(waiting on the security harness for my 2018 from DeereGuy)

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post #36 of 480 (permalink) Old 01-18-2019, 05:59 PM
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Originally Posted by Ricky_Bobby View Post
I just ordered Mopar LED tails and the Retroshop adapters, but I want to add 7440 white LED bulbs in my reverse lights - the brand I used elsewhere on the truck are all Canbus error free bulbs, but on these reverse bulbs it doesnt specifically say it in the listing, except "polarity free" which historically means they are a Canbus bulb -

It only mentioned in the listing you'd need a resistor if using the bulbs in a turn signal application which makes sense - do you think I'd be ok running these in the LED tails with the Retroshop harness until I get my AlfaOBD running?(waiting on the security harness for my 2018 from DeereGuy)
I went with these in the beginning of 2017 (going on 2 years) and they've been great. They're not available anymore but I'm providing a link so you can see the pictures anyway. They never threw an error but they'll react to PWM as displayed in the video in my post prior in this thread.

https://www.cumminsforum.com/forum/2...l#post28864747

Link to bulbs: https://smile.amazon.com/gp/product/B01DGC885C

I hope this helps.

-Guzzler

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PRIOR: 1994, 1996, 2004, 2005.5, 2010 and 2013 2500's. ALL Cummins.

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Last edited by 67guzzler; 01-18-2019 at 06:02 PM.
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