2 Low with the new electric front axle CAD

[SnoKing]

The front axle interlock has 4 wires going to it,ign feed ground and 2 control from the dtcm

the wiring repair kit is Number: 68068630AA

Do think it is two control leads or one control lead and one feedback lead to indicate that 4x4 mode is now active. That is the way I interpreted it! I hear the motor run then see the light for 4x4 come on. So there must be a feed back from the CAD. SNOKING

 

[Bob4x4]

yup..................

 

[mpaulson]

Do think it is two control leads or one control lead and one feedback lead to indicate that 4x4 mode is now active. That is the way I interpreted it! I hear the motor run then see the light for 4x4 come on. So there must be a feed back from the CAD. SNOKING

So one would need to know if it is 12volts for sure feeding the motor and as well the feed back line. If they are both 12volt positive, then one could intercept those two wires with a toggle switch essentially "joining them" before the power gets to the actuator motor and send a current back up the feed back line so the truck thinks it is locked in. I assume that when the motor is activated and does the shift stroke it maybe hits a limit switch which sends the current back to confirm the shift is done. So if the motor doesn't get the current to do the shift(toggle switch intercepting it), but the feed back line gets current confirming the shift is done, the computer would be happy and let us have our 2 wheel low.
I too had the vacuum kit on the last second gen truck and I have locking hubs on my last third gen truck and liked the 2 wheel low ability and made good use of it with both trucks.

 

[SnoKing]

If there is a relay in the axle pack, then I believe you are pretty close to how it operates. 12V is there to run the motor to engage and disengage the CAD. Front axle control lead picks the replay and the motor runs to engage, hitting a limit that stops the motor and sends the locked signal back to the PCM. Drop the control lead, relay drops and the motor reverses to disengage the CAD stopping at a limit switch and dropping the locked signal to the PCM.

The big question is what happens if it does not get the locked signal and if that needs to be included in the mode?

It would be nice to build a plug and play kit that has matching connectors for the plug in on the CAD or if there is one on the run deep in the engine compartment.

SNOKING

 

[photowrite]

I started working on this a few weeks ago, but had to stop because of no time and upcoming travel. I'll look at it again next month when I have time.

My thinking is it might be easier with a manual T-case truck like my '14 Tradesman, because I can manually shift the T-case to low, I just need to stop the module from engaging the CAD. I successfully did/tested this by pulling a single wire at the transfer case, with a light on the dash and a code I later cleared. Of course, no codes is the goal.

 

[SnoKing]

I started working on this a few weeks ago, but had to stop because of no time and upcoming travel. I'll look at it again next month when I have time.

My thinking is it might be easier with a manual T-case truck like my '14 Tradesman, because I can manually shift the T-case to low, I just need to stop the module from engaging the CAD. I successfully did/tested this by pulling a single wire at the transfer case, with a light on the dash and a code I later cleared. Of course, no codes is the goal.

Given that the CAD only has 12V+ and ground to use to signal the PCM that it is engaged, it has to provide one or the other to the PCM. Now it might have a resistor in the lead, but I would think that they put that in the PCM it's self, not the CAD motor.

So this present a little issue if you set a code. On my 2001.5 with Bob-V's kit the dash light indicated that you had gotten into 2 low, as the 4x4 light was not on. The way I plumber it you went to 4 Lo and then pulled the control and it unlocked the CAD and indicated by turning the light off.

BTW Posi-Lok called back and said that they will NOT be working on this for the new trucks.

SNOKING

 

[mpaulson]

I wonder if BD Diesel is considering this idea? They made a kit for the second gen trucks as well.

 

[SnoKing]

I wonder if BD Diesel is considering this idea? They made a kit for the second gen trucks as well.

Talk to them, they are on your side of the 49th parallel. SNOKING

 

[mpaulson]

I just sent BD a message asking if they have looked into it or would be looking into it.

 

[mpaulson]

Just got this reply back from BD. So if we all send emails or call them they will get a sense of the market for these and get going on it!

Hi Monte

Yes, we’ve been discussing building one as we have had this request before. No concrete plans or ETA exists yet, but if we verify that there is a widespread market for one, which there does seem to be, then we would probably have one available for next summer.

Hope this helps, thanks for the enquiry.

Regards, Cam Rose
Tech Support, BD Diesel

 

[photowrite]

Just got this reply back from BD. So if we all send emails or call them they will get a sense of the market for these and get going on it!

Thanks for sharing that, I sent them a note too.