I need the wiring diagram of Hyundai Veracruz 2008. specially ABC Module.

Very unlikely. They aren't cable operated, just a small servo motor and a linkage.

Ssanta Fe with pics

https://www.hyundai-forums.com/threads/diy-blend-door-temp-motor-actuator-with-pics.289994/

Videos

https://www.google.com/search?q=2008+hyundai+veracruz+stuck+blend+door+flap

..

http://www.carproblemzoo.com/hyundai/veracruz/brake-abs-warning-light-problems.php

Here is the procedure from Autozone.com
Removal & Installation Specific to:
Hyundai Santa Fe 2006-2008
Hyundai Veracruz 2007-2008

1. Before servicing the vehicle, refer to the Precautions Section.
2. Remove or disconnect the following:
   
   Negative battery cable and wait at least 3 minutes, Speedometer cable and shift cable from the transaxle, Starter motor wiring, Starter motor bolts, and the starter

To install:
Installation is the reverse of removal. Tighten starter motor bolts to 20-25 ft. lbs. (27-34 Nm).

There's nothing in the manuals about special tools. I have the same problem. I think you'll have to remove the lower bumper in order to get good access to it. It appears that there is a black housing screwed into the bumper from the rear side and the lens would snap into that.

For Hyundai Veracruz, rear outlet fuse box is in engine compartment. On left side (next to blue water cap). Refer to manual page 7-47 and 7-51. There is two 30Amp fuses.

Car Radio Constant 12v+ Wire: Red
Car Radio Switched 12v+ Wire: Green/Black
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Yellow
Car Stereo Dimmer Wire: Black/Orange
Car Stereo Antenna Trigger: Green
Left Front Speaker Positive Wire (+): Black
Left Front Speaker Negative Wire (-): White
Right Front Speaker Positive Wire (+): Blue
Right Front Speaker Negative Wire (-): Red
Left Rear Speaker Positive Wire (+): Black
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Green
Right Rear Speaker Negative Wire (-): Orange

I would think after the second alternator they would start looking for the real problem.
Unless the extended warranty does not pay for diagnostic time.
You may have to take it to a shop that focuses on electrical systems to find the real issue. Or pay the dealer to troubleshoot it.

I would use a Curt 56024 T-Connector Kit. This lets you connect the wiring kit without needing to splice any wires.

Should still be under warranty? Does the vehicle have more than 60,000 miles on it?

solenoid on starter giving you that problem.