EXHIBIT 99.4



                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

         In connection with the Quarterly Report of 1st Source Corporation (the
         "Company") on Form 10-Q for the quarterly period ended June 30, 2003,
         as filed with the Securities and Exchange Commission on the date hereof
         (the "Report"), I, Larry E. Lentych, Chief Financial Officer of the
         Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted
         pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my
         knowledge:


     (1)  The Report fully complies with the  requirements  of sections 13(a) or
          15(d) of the Securities and Exchange Act of 1934; and

     (2)  The information contained in the Report fairly presents, in all
          material respects, the financial condition and results of operations
          of the Company.

         By:


         /s/Larry E.Lentych
         ------------------
         Larry E. Lentych
         Chief Financial Officer
         July 28, 2003


         The foregoing certification is being furnished solely for purposes of
         compliance with 18 U.S.C. Section 1350 and shall not be deemed "filed"
         for purposes of Section 18 of the Securities Exchange Act of 1934 (15
         U.S.C. 78r), or otherwise subject to the liability of that section.
         Such certification will not be deemed to be incorporated by reference
         into any filing under the Securities Act of 1933 or the Securities
         Exchange Act of 1934.

         A signed original of this written statement required by Section 906 has
         been provided to 1st Source Corporation and will be retained by 1st
         Source Corporation and furnished to the Securities and Exchange
         Commission or its staff upon request.