Hemi Dakota Cruise Control VSS1 and VSS2 signals - Hemi Truck Club
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Old 09-12-2020, 07:26 PM   #1
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Join Date: Dec 2019
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Hemi Dakota Cruise Control VSS1 and VSS2 signals

I am back to working on my Cruise Control circuit on my 02 Dakota Hemi swap. Looking at the Ram ECM and ABS circuit there are 2 VSS signals from the ABS to ECM. The Dakota ABS only has 1 VSS signal. I got an oscilloscope so I can see the VSS 1 signal and here it is. Some people suggested that I could use VSS1 and VSS2 by connecting them together but when I tried this the truck would barely run over 60mph. I can connect my DRB3 to the ECM and see the speed sensor working and I can see the CC buttons signals change when I press a button the Ram steering wheel.
I need to know what is the VSS2 signal supposed to look like? Is a square wave signal like VSS1?
I have an electronics degree so I think I can build a signal duplicator circuit if I just knew what is supposed to look like.
The only other option I was looking at was to add the wheel sensors on the front 2 wheels, change the wheel bearings to the ones with the tone ring and use a 05 Ram ABS module, I actually bought the ABS module last week before I got to thinking that I can beat this issue with electronics.
What do you guys think?
Attached Images
File Type: jpg CC1.jpg (42.4 KB, 0 views)
File Type: jpg CC2.jpg (42.8 KB, 0 views)
File Type: jpg vss.jpg (35.8 KB, 0 views)

02 Dakota QC 5.7 Hemi swap
06 Dodge 3500 Cummings
18 Jeep GC
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Old 09-12-2020, 07:33 PM   #2
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I like it when a simulator can be used but in this case I think replacing the wheel bearing with a tone ring style would be the better route.
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