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                                                                   EXHIBIT 10.47
                                                                  EXECUTION COPY

                       CONTRIBUTION, INDEMNIFICATION AND
                            SUBORDINATION AGREEMENT

     THIS CONTRIBUTION, INDEMNIFICATION AND SUBORDINATION AGREEMENT
("Agreement") is made as of this 24th day of October, 1997 among Code-Alarm,
Inc., a Michigan corporation ("Code Alarm"), Tessco Group, Inc., a Michigan
corporation ("Tessco"), Anes, Inc., a Michigan corporation ("Anes"), Chapman
Security Systems, Inc., a Michigan corporation ("Chapman"), Intercept Systems,
Inc., a Michigan corporation ("Intercept") (Code Alarm, Tessco, Anes, Chapman
and Intercept being sometimes hereinafter collectively referred to as the
"Credit Parties" and each individually referred to as a "Credit Party"), and
General Electric Capital Corporation as "Agent" for the "Lenders" from time to
time party to that certain Credit Agreement of even date herewith among Code
Alarm (the "Borrower"), the other Credit Parties, the Agent and the Lenders
(including all annexes, exhibits or schedules thereto, as from time to time
amended, restated, supplemented or otherwise modified, the "Credit Agreement").
Undefined capitalized terms which are used herein shall have the meanings
ascribed to such terms in the Credit Agreement.

     1.   Contribution and Indemnification among the Credit Parties.

     (a)  Pursuant to the Credit Agreement, the Agent and the Lenders have
provided, and from time to time hereafter may provide, Loans and Letters of
Credit to and for the benefit of the Borrower.

     (b)  As a condition to the Agent's and the Lenders' entering into the
Credit Agreement, each of the Credit Parties have guaranteed all of the
Obligations under and as defined in the Credit Agreement and each have granted
security interests in and liens on substantially all of their properties as
security for such guaranty obligations and Obligations pursuant to certain Loan
Documents.

     (c)  To the extent that any Credit Party shall, under the Loan Documents
as a guarantor, pledgor, mortgagor or other third party accommodation party,
repay (whether directly or with the proceeds of property constituting
Collateral) any of the Obligations (an "Accommodation Payment"), then the
Credit Party making such Accommodation Payment shall be entitled to
contribution and indemnification from, and be reimbursed by, each of the other
Credit Parties in an amount, for each of the Credit Parties, equal to a
fraction of such Accommodation Payment, the numerator of which fraction is such
Credit Party's "Allocable Amount" (as defined below) and the denominator of
which is the sum of the Allocable Amounts of all of the Credit Parties.

     (d)  As of any date of determination, the "Allocable Amount" of each
Credit Party shall be equal to the maximum amount of liability for
Accommodation Payments which could be asserted against such Credit Party under
the Loan Documents without (i) rendering such Credit 
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Party "insolvent" within the meaning of Section 101(32) of the Federal
Bankruptcy Code (11 U.S.C. Section 101 et. seq.) (the "Bankruptcy Code"),
Section 2 of the Uniform Fraudulent Transfer Act (the "UFTA") or Section 2 of
the Uniform Fraudulent Conveyance Act (the "UFCA"), (ii) leaving such Credit
Party with unreasonably small capital or assets, within the meaning of Section
548 of the Bankruptcy Code, Section 4 of the UFTA, or Section 5 of the UFCA,
(iii) leaving such Credit Party unable to pay its debts as they mature or
become due within the meaning of Section 548 of the Bankruptcy Code or Section
4 of the UFTA, or Section 6 of the UFCA, or (iv) having any similar result
under any other applicable insolvency law.
        
           (e)  The provisions of this Agreement shall, to the extent 
inconsistent with any provision in any other Loan Document, supersede any such
inconsistent provision.
        
           2.   Subordination of Intercompany Claims Among Credit Parties.  
(a)  Each Credit Party hereby agrees that, until the payment in full of all
Obligations, the termination of the Commitments and the expiration of all
Letters of Credit, and without in any way limiting any provisions of any
Guaranty:
        
           (i)  all obligations and claims which are now or hereafter owing to
      such Credit Party from another Credit Party, including, without
      limitation, all intercompany loans, advances and other obligations
      heretofore, now or hereafter made to such Credit Party by the other
      Credit Parties, including, without limitation, amounts evidenced by the
      Master Intercompany Demand Note, and all claims arising under the terms
      of this Agreement (collectively, the "Intercompany Claims"), are hereby
      subordinated in right of payment to all Obligations of the Credit Parties
      now existing or hereafter arising under any of the Loan Documents,
      whether fixed or contingent, matured or unmatured, including, without
      limitation, all such obligations arising after the filing of a petition
      in bankruptcy under the Bankruptcy Code, regardless of whether or not
      allowed under such case or proceeding; provided, however, that
      Intercompany Claims may be repaid in the ordinary course of the Credit
      Parties' businesses as conducted on the Closing Date and; provided,
      further, however, that following the occurrence of an Event of Default
      and Agent's notice to the Credit Parties of Agent's exercise of its
      rights under this paragraph, all such payments with respect to the
      Intercompany Claims shall be paid directly to Agent for application to
      the Obligations;

           (ii)  it shall not, without the written consent of Agent, enforce,
      or seek to enforce, any right or remedy with respect to the Intercompany
      Claims or any security therefor, by judicial or administrative action or
      otherwise, nor shall it file or join the filing of any involuntary
      petition in bankruptcy, appoint a trustee, receiver, conservator or
      liquidator of any Credit Party, in each case with respect to its
      Intercompany Claims, or otherwise initiate or participate in the
      initiation of any similar proceedings for the benefit of creditors of any
      Credit Party;



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           (iii)  except as permitted under the proviso of Section 2(a)(i) of 
      this Agreement or under the other Loan Documents, it shall not receive
      any payments in cash or other property with respect to any Intercompany
      Claim, whether by payment or set-off;
        
           (iv)   it shall pay over to Agent all amounts received by it in
      payment of its Intercompany Claims which, pursuant to the terms of this
      Agreement, it is not entitled to retain, in the precise form in which
      such amounts are received (with any endorsements thereon as may be
      required by Agent), for application to the Obligations, and until so paid
      over, it shall hold such amounts in trust for Agent; and

           (v)    in the event of any receivership, insolvency, bankruptcy,
      assignment for the benefit of creditors, reorganization or arrangement
      with creditors, whether or not pursuant to bankruptcy law, the sale of
      all or substantially all of the assets of any Credit Party, dissolution,
      liquidation or any other marshalling of the assets or liabilities of any
      Credit Party, each other Credit Party will file all claims, proofs of
      claim or other instruments of similar character necessary to enforce the
      Intercompany Claims and promptly pay over to Agent in the form received
      (except for any necessary endorsement) for application to the Obligations
      any and all moneys, dividends or other assets received in any such
      proceedings on account of the Intercompany Claims, unless and until the
      Obligations have been paid in full.  If any Credit Party shall fail to
      take any such action, Agent, as attorney-in-fact for such Credit Party,
      may take such action on any Credit Party's behalf.  Each Credit Party
      hereby irrevocably appoints Agent, or any of its officers or employees,
      as the attorney-in-fact for such Credit Party (which appointment is
      coupled with an interest) with the power but not the duty to demand, sue
      for, collect and receive any and all such moneys, dividends or other
      assets and give acquittance therefor and to file any claim, proof of
      claim or other instrument of similar character, to vote claims comprising
      Intercompany Claims to accept or reject any plan of partial or complete
      liquidation, reorganization, arrangement, composition or extension and to
      take such other action in Agent's own name or in the name of any Credit
      Party as Agent may deem necessary or advisable for the enforcement of the
      agreements contained herein; and each Credit Party will execute and
      deliver to Agent such other and further powers-of-attorney or instruments
      as Agent may request in order to accomplish the foregoing.

           (b)    If any Credit Party shall have any right under applicable 
law or otherwise to terminate or revoke the provisions of this Section 2, which
right cannot be waived, such termination or revocation shall not be effective
until written notice of such termination or revocation, signed by such Credit
Party, is actually received by Agent.  Absent the circumstances described in
the preceding sentence, this is a continuing agreement of each Credit Party
that Agent may continue, at any time and without notice to any Credit Party, to
extend credit or other financial accommodations and loan monies to or for the
benefit of any Credit Party on the faith hereof.  Any termination or revocation
described hereinabove shall not affect this Agreement in relation to any of the
Obligations which arose prior to receipt thereof or which are created after
receipt thereof, if such Obligations were incurred either through readvances by
Agent pursuant to Agent's financing arrangements with any Credit Parties,
and/or for the purpose of protecting any 
        

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collateral, including, but not limited to, all protective advances, costs,
expenses, and attorneys' and paralegals' fees, whensoever made, advanced or
incurred by Agent in connection with the Obligations.  If, in reliance on this
Agreement, Agent makes loans or other advances to or for the benefit of any
Credit Party, or take other action under the Loan Documents after such
termination or revocation by any Credit Party but prior to the receipt by
Lender of said written notice as set forth above, the rights of Lender shall be
the same as if such termination or revocation had not occurred.
        
     (c)  All of the Obligations shall be deemed to have been made or incurred
in reliance upon this Agreement.  Each Credit Party expressly waives all
notices not specifically required pursuant to the terms of this Agreement, and
each Credit Party expressly waives reliance by Agent upon the subordination and
other agreements provided herein.  Except as expressly set forth herein, each
Credit Party acknowledges that Agent has made no warranties or representations
with respect to the due execution, legality, validity, completeness or
enforceability of any Loan Documents or the collectibility of the Obligations.
Agent shall be entitled to manage and supervise its loans to any Credit Party
in accordance with applicable law and Agent's usual practices, modified from
time to time as Agent deem appropriate under the circumstances, without regard
to the existence of any rights that any Credit Party may now or hereafter have
with respect to other Credit Parties, and Agent shall have no liability to any
Credit Party for, and each Credit Party hereby waives any claim which any
Credit Party may now or hereafter have against, Agent arising out of any and
all actions which Agent, in good faith, takes or omits to take (including,
without limitation, actions with respect to the creation, perfection or
continuation of liens or security interests in any Collateral or proceeds
thereof, actions with respect to the occurrence of any Event of Default,
actions with respect to the foreclosure upon, sale, release, or depreciation
of, or failure to realize upon, any of Collateral or proceeds thereof, and
actions with respect to the collection of any claim for all or any part of the
Obligations from any account debtor, guarantor or any other party) with respect
to any Loan Documents or to the collection of the Obligations or the valuation,
use, protection or release of any Collateral or proceeds thereof, and/or other
security for the Obligations.

     3.  Governing Law.  This Agreement shall be construed and enforced and the
rights and duties of the parties shall be in all respects governed by and in
accordance with the internal laws and decisions (as opposed to the conflict of
laws provisions) of the State of Illinois.

     4.  Headings.  Section headings in this Agreement are included herein for
convenience of reference only and shall not constitute part of this Agreement.

     5.  Counterparts.  This Agreement may be executed by one or more of the
parties hereto on any number of separate counterparts and all of said
counterparts taken together shall be deemed to constitute one and the same
agreement.

                                    * * * *






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     IN WITNESS WHEREOF, this Agreement has been duly executed as of the day
and year first above written.

                                     CODE-ALARM, INC.



                                     By: /s/ Rand Mueller                  
                                        -----------------------------------
                                         Name: Rand Mueller                
                                               ----------------------------
                                         Title: President                  
                                               ----------------------------


                                     TESSCO GROUP, INC.



                                     By: /s/ Rand Mueller                  
                                        -----------------------------------
                                         Name: Rand Mueller                
                                               ----------------------------
                                         Title: President                  
                                               ----------------------------

                                     ANES, INC.



                                     By: /s/ Rand Mueller                  
                                        -----------------------------------
                                         Name: Rand Mueller                
                                               ----------------------------
                                         Title: President                  
                                               ----------------------------

                                     CHAPMAN SECURITY SYSTEMS, INC.


                                     By: /s/ Rand Mueller                  
                                        -----------------------------------
                                         Name: Rand Mueller                
                                               ----------------------------
                                         Title: President                  
                                               ----------------------------

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                                     INTERCEPT SYSTEMS, INC.



                                     By: /s/ Rand Mueller                  
                                        -----------------------------------
                                         Name: Rand Mueller                
                                               ----------------------------
                                         Title: President                  
                                               ----------------------------

Agreed and Accepted as of
this 24th day of October, 1997:


GENERAL ELECTRIC CAPITAL CORPORATION
 as the Agent


By:  /s/ Timothy S. Van Kirk
    ----------------------------------
    Name: Timothy S. Van Kirk
         -----------------------------
    Title: Duly Authorized Signatory
          ----------------------------