2016 Prostar abs/tc/ axle load sensor issues ?

I bought a 2016 prostar last year. I’ve been having an issue with my abs, traction control lights flickering intermittently on and off and my speedometer loosing power at the same time when travelling down the road. The instrument cluster screen says abs module when this happens.

I just found out this truck has axle load sensing with text message read out for rear axle weight.

I pulled the in cab controller codes with DLB and came up with an active SPN 1727 FMI 4 with 64 counts. Fault on Analog input 1 below normal when used for axle load) last time I checked before a 3 hour trip it had 41 counts. So obviously I have an issue.

probable cause - voltage below normal, or shorted to low source.

Module - instrument cluster.


has anyone ever had this type of issue ?

Are the axle load sensors tired into the abs module ?

 

Or is the bad wiring just messing up the instrument cluster and it has nothing to do with the abs module ?

 

..

 

I cleared the codes today and went for a 5 minute drive. I scanned the truck with DLB and got a few intermittent ABS datalink spn 639 codes

they are all datalink codes, so I guess I have harness issues or something. I haven’t check out the ABS datalink backbone splice that is a known failure point in some of these trucks. I’m hoping that’s the issue and not a bad wire somewhere or a bad connector pin.

spn 639 fmi 2 with 28 counts - ABS Drivetrain message timeout

Spn 639 fmi 5 with 1 count - ABS current below normal or open circuit

Spn 639 fmi 9 with 2 counts - J1939 Drivetrain data link lost

Spn 639 fmi 12 with 1 count - ABS Drivetrain message timeout

Spn 2011 fmi 9 with 1 count - loss of datalink from from ABS controller - (Instrument cluster)

my speedometer glitched out once and the abs and TC and yellow triangle light flashed on and off once on the 5 minute drive.

 

I hope it’s nothing to serious

 

I have checked resistance in the datalink and got 58 ohms with batteries disconnected and voltage of roughly 2.3v and 2.7v on the pins with key on and batteries hooked up

I still need to check resistance on pin C to ground and will also check resistance on pin D to ground.

 

Is there any other known areas where the datalink gets pinched or corroded on these trucks ?