EXHIBIT 23(a) CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS We consent to the incorporation by reference in the following registration statements of Harris Corporation and in each related Prospectus of our report dated July 25, 2001, except for Note "BUSINESS SEGMENTS -- Restated", as to which the date is May 31, 2002, with respect to the consolidated financial statements and schedule of Harris Corporation and subsidiaries included in the Annual Report on Form 10-K for the fiscal year ended June 29, 2001, as amended, included in this Form 10-K/A: <Table> Form S-8 No. 33-50169 and Harris Corporation Retirement Plan 333-75114 Form S-8 Nos. 33-37969; Harris Corporation Stock Incentive Plan 33-51171; and 333-7985 Form S-8 No. 333-49006 Harris Corporation 2000 Stock Incentive Plan Form S-3 No. 333-03111 Harris Corporation Debt Securities Form S-3 No. 333-66241 Harris Corporation Debt Securities </Table> /s/ ERNST & YOUNG LLP Orlando, Florida May 31, 2002