Hello all I have a 08 F450SD v10 driver said he just got into it would not crank and security (lock and car)lamp flashing.Once at vehicle same concern verified by us we checked fuses underhood and dash. Disconnect battery. Reset KAm and codes.As for codes I dont have numbers in front of me but some were mismatch(no parts replaced some were TPM codes a brake lamp circuit code.Finally decided to check SJB and when entering area lights went out truck started so we drove to garage and driver said he would loose all dash or have several lamps illuminated but stayed running.When shut off again same situation but close observation includes no prndl illumination no gauges or other lamps . While messing with SJB area wires seemed to locate a white colored plug approximately 10 wires when articulating prndle and gauges come back and would start. Does anyone know if this harness is included in communication wiring would explain some symptoms. the connector was dirty and one wire yellow with grey tracer was green. was out of time when return going to bypass that wire around connector and see if problem is fixed but any input or common communication concerns or advice would be great.