17 TS-12Rev
- 2 -
12/9/2019
REQUIRED ACTION
Anti-chaffing tape should be applied to the current ATS harness, or to a new replacement
harness if it does not have the tape. See the Repair Procedure section for instructions on
installing the tape.
REQUIRED MATERIAL
If the harness needs replacing, the current production and service ATS harness is P/N:
A4721504320. It superseded former P/N: A4721503620 with approximate ATS S/N:
1240000769034 at the truck plants in July, 2017. The new harness has anti-chaffing tape under
the loom. Either part number is acceptable to use in a repair. Refer to the eParts Catalog on
ddcsn.com with the specific engine serial number to verify the correct ATS harness part
number.
If repairing or installing harness P/N: A4721503620, portions of the harness will need to be
wrapped with anti-chaffing tape such as DTNA P/N: 48-25910-003 or commercially available
tape, Coroplast 832 MPX. The DTNA tape is 82
’ long x 1” wide, and is enough for multiple
vehicles. See the Repair Procedure section for instructions on installing the tape.
REPAIR PROCEDURE
Follow the procedure below.
ELECTRICAL SHOCK
To avoid injury from electrical shock, use care when connecting battery cables. The
magnetic switch studs are at battery voltage.
1.
Shut off engine and apply the parking brake, chock the wheels, disconnect vehicle battery
power, and perform any other applicable safety steps.
2. If necessary, remove the passenger side fairing. Refer to OEM procedures.
3. Allow the ATS time to cool.