'Printing ascii value with character in byte array in 8086

I am trying to print the 2 digit hex ascii value of a character but WriteHex keeps printing 8 bits. I am unsure how to fix this. The byte_array contains all characters of what I am trying to print but I need to print their hex value for a hexdump procedure. I am using the Irvine16 library for the WriteHex proc and a self generated library for the WriteChar240 proc.

dump_ascii_value PROC

    pushf
    push dx
    push ax
    push bx
    push cx

    mov dh, location_y
    mov dl, second_col_x
    mov ah, 02h
    int 10h


    mov cx, 0
    mov bx, offset byte_array

    top:
    cmp [bx], cx
    jz done

    mov al, 0
    mov ax, WORD ptr [bx]
    call WriteHex
    mov al, 020h
    call WriteChar240
    inc bx
    jmp top


    done:
    pop cx
    pop bx
    pop ax
    pop dx
    popf
    ret


dump_ascii_value ENDP

'''

assemblyx86-16


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