International SA 33 SPN 2636 FMI 6: Wiper On/Off Relay Over Current

SA 33 SPN 2636 FMI 6 on International / Navistar trucks means: Wiper On/Off Relay Over Current. The failure mode (FMI 6) is “current above normal or grounded circuit”.

Code details

Manufacturer: International (Navistar)
Applies to: International / Navistar body controller (ESC) and multiplexed modules
Fault code: SA 33 SPN 2636 FMI 6
J1939 SPN: 2636
FMI: 6 — Current above normal or grounded circuit
Reporting module: Body Controller (source address 33)
Component / signal: Windshield Wiper Motor ON/OFF
Truck models in source: 3200, 4100, 4300, 4400, 7300, 7400, 7500, 7600, 7700, 8500, 8600, BE 200, CE Bus, CXT, DuraStar, LoneStar, MXT, ProStar, RXT, TranStar, WorkStar
Connector pins: 1601-E7
Logical signal: Wiper_Low_Speed_Relay_C md

Cause and when it sets

Cause: Short To Ground in Wiper On/Off Circuit

What to do next

Read active and inactive codes with the OEM service tool (Diamond Logic Builder can clear previously active codes) and note the occurrence count.
FMI 6 tells the shop the type of failure to test for: current above normal or grounded circuit.
Have a heavy-duty diesel technician confirm the fault against the engine or chassis service manual before replacing parts.