Medium and Heavy Trucks
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can you check the flash code from the instrument cluster???
Section 70.1Description of Flash Code 74
The SAE J1587 equivalent code for Flash Code 74 is p 70/4.
Flash Code 74 indicates that the Park Brake digital input is shorted to ground between the VIH connector and one of the switches (Park Brake Switch, Neutral Switch, Hood Switch or optional OEM interlock).
this is the description of the code.
is it currently active???