Add automatic wipers

[Dinostop]

I replaced the sensor behind my mirror with the sensor that also does automatic wipers, I added the 2 codes using alpha OBD. My wipers now do not work in intermittent mode and do not automatically turn on when raining. It is raining pretty good and I started my truck to test it. Any ideas?
2021 Ram 3500 Big Horn.

 

[Jimmy07]

What is the part number of the sensor that was there before? What is the part number of the new sensor? Is there a “window” in the black frit pattern on the windshield for the sensor to see though? What are the two settings you changed with AlfaOBD? What faults are you getting in the BCM?

 

[Dinostop]

@Jimmy07
New sensor is 68298468AA
Don’t have the old sensor with me
Yes there is a “window” for it to see through
The fault is: u0321 lost connection with rain sensing module
Changes using alpha obd were
Veh config 2 rain sensor present
Custsetmenu 1 rain sensing wip

 

[Jimmy07]

That sensor is for humidity only (for the 1500 dual zone ATC). You need part number 68298334AA for rain sense.

 

[Dinostop]

Whene I google it, every MopR site says “Rain Sensor - 68298468AA

68298468AA - Rain Sensor 2019-2024 Ram | Mopar Wholesale Parts

Order Your OEM Rain Sensor (68298468aa) For Your 2019-2024 Ram Vehicle At A Discount Price With Nationwide Delivery!

www.moparwholesaleparts.com

 

[Dinostop]

That sensor is for humidity only (for the 1500 dual zone ATC). You need part number 68298334AA for rain sense.

@Jimmy07
I ordered the part number you noted and I do not get any trouble codes, but when I turn the wipers on they act as normal. Both of the OBD codes were added and I se the option in the radio. Any thoughts?

 

[Jimmy07]

What are the settings you changed?

 

[Dinostop]

What are the settings you changed?

Vehicle config 2 rain sensor present
Cust.set.menu 1 rain sensing wipers

put them both to yes.

 

[Jimmy07]

Is LIN & Misc: Humidity Rain Light Sensor Present set to yes also?

 

[Dinostop]

Is LIN & Misc: Humidity Rain Light Sensor Present set to yes also?

Yes I had verified that was turned to yes.

 

[Jimmy07]

With rain sensing wipers turned on in the radio settings, when you turn the switch in any of the intermittent modes, do the wipers behave more like a series of erratic “ghost” wipes than the normal wiper operation?
Try running the light rain sensor re-adaption. It is in the same list that car configuration change is in.

 

[Dinostop]

@Jimmy07
I have left the truck sit for 2 nights with moderate driving in between. I double checked all the options as previously noted. Yes they are irrational in timing when in intermittent modes. I get an error when running the re-adaption that says something about can’t run do to certain parameters.

 

[Jimmy07]

If it is constant erratic behavior, then there is probably either air pockets, or dust trapped between the windshield and adhesive membrane of the sensor.

 

[Dinostop]

I’ve ordered a new gel pack and will work on it when it comes in.

 

[Dinostop]

If it is constant erratic behavior, then there is probably either air pockets, or dust trapped between the windshield and adhesive membrane of the sensor.

No one seems to had the gel packs. I removed the sensor and put it back on pressing firmly. I didn’t see any dust or anything in the way of the sensor. Still erratically turning wipers on and off.

 

[blbrown]

No one seems to had the gel packs. I removed the sensor and put it back on pressing firmly. I didn’t see any dust or anything in the way of the sensor. Still erratically turning wipers on and off.

We're you able to get the rain sensor to work?

 

[Dinostop]

We're you able to get the rain sensor to work?

Unfortunately no I did not. The wipers are sporadic and the gel looks clean and bubble free. Not sure what I missed but I gave up until I can find someone that has been able to get it working.

 

[blbrown]

I'll probably purchase the one Jimmy07 recommended sometime after Christmas, I'll let you know how it goes

 

[blbrown]

That sensor is for humidity only (for the 1500 dual zone ATC). You need part number 68298334AA for rain sense.

I purchased the sensor you recommended here, haven't installed yet because I am concerned this might not also support the dual zone ATC which the existing module is for. Does 68298334AA support both functions?

 

[Jimmy07]

I purchased the sensor you recommended here, haven't installed yet because I am concerned this might not also support the dual zone ATC which the existing module is for. Does 68298334AA support both functions?

Yes. The one you originally have is only a humidity sensor for ATC. The new one is both rain and humidity sensor.