I have a John Deere Z445 zero turn mower and I can't get a wiring diagram anywhere. I called John Deere and they want to charge me. I am really in trouble because I need the mower for my business. I want to fix it myself but I don't have a diagram. Please help. If you can fax the 4 pages over to me or help me with another solution, please contact me. Thanks.

Hi,
Firstly that is not a commercial mower, though the engine is. Secondly, yes Deere wants to sell the service manal but the parts look-up is free. Just go to John Deere Home Page Redirect then Residential and choose Service and Support then Parts. Type in Z445 and there you have it.
That said there are two serial number breaks for the electrical system. I will attach the pictire of the harness used until 40000.
John Deere - Parts Catalog
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Catalog: 9595 | Grid: C1 | Section: 40 | Page: 4
Catalog Name: Z445 EZTrak Residential Zero Turn Mower (Worldwide Edition)
Page Name: WIRING HARNESS (SN -040000)


KEY PART NO. PART NAME QTY SERIAL NO. REMARKS
1 57M9480 CONNECTOR 1 HOUR METER
2 57M9482 CONNECTOR 1 IGNITION SWITCH
3 M117518 CONNECTOR 1 PTO SWITCH
4 Z40696 CONNECTOR 1 HEADLIGHT
5 AM135987 WIRING HARNESS 1 MAIN
6 RETAINER 4
7 FUSE HOLDER 1
8 57M7120 FUSE 2 20 AMP
9 99M7064 FUSE 1 7.5 AMP
10 37M7089 SCREW 2 M6 X 12
KEY PART NO. PART NAME QTY SERIAL NO. REMARKS
11 RETAINER 1
12 M90206 CONNECTOR 1 LH NEUTRAL SWITCH
13 57M7974 CONNECTOR 1 SEAT SWITCH
14 RETAINER 3
15 57M9364 CONNECTOR 1 ENGINE HARNESS
16 EYELET 1 GROUND
17 T28586 CONNECTOR 1 CLUTCH
18 M90206 CONNECTOR 1 RH NEUTRAL SWITCH
19 EYELET 1 BATTERY +
M95539 BOOT 1
KEY PART NO. PART NAME QTY SERIAL NO. REMARKS
20 EYELET 1 SOLENOID B+
M135512 BOOT 1
21 T28583 CONNECTOR 1 SOLENOID (-)
22 T28583 CONNECTOR 1 SOLENOID (+)
23 57M9362 CONNECTOR 1 RELAY
24 AT75769 RELAY 1 (SUB FOR AM106305)
25 M90206 CONNECTOR 1 BRAKE SWITCH