Viper

®

Model 791 XV
Installation Guide

NOTE: This product is intended for installation by a professional installer only! Any attempt to install this product by any person other than a trained professional may result in severe damage to a vehicle’s electrical system and components.

© 2003 Directed Electronics, Inc. Vista, CA N564V 6-03

Bitwriter™, Code Hopping™, Doubleguard®, ESP™,FailSafe®, Ghost Switch™, Learn Routine™, NiteLite®, Nuisance Prevention Circuitry®, NPC®, Revenger®, Silent Mode™, Soft Chirp®, Stinger®, Valet®, Vehicle Recovery System®, VRS®, and Warn Away® are all Trademarks or Registered Trademarks of Directed Electronics, Inc.

New Software Compatibility for 103T Keypad This unit now has software that allows arming with entry delay when used in conjunction withthe optional 103T Keypad. Refer to the 103T Owner’s Guide for details.

The Bitwriter (p/n 998T) requires chip version 1.4 or newer to program this unit.

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© 2003 Directed Electronics, Inc. Vista, CA

table of contents
what is included . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 warning! safety first . . . . . . . . . . . . . . . . . . . . . . . . 4 installationpoints to remember. . . . . . . . . . . . . . . . 5 before beginning the installation . . . . . . . . . . . . . 5 after the installation. . . . . . . . . . . . . . . . . . . . . . 5 deciding on component locations . . . . . . . . . . . . . . . 6 locations for the control module . . . . . . . . . . . . . . 6 locations for the siren . . . . . . . . . . . . . . . . . . . . . 6 locations for stingerdoubleguard shock sensor . . . . 7 locations for the status LED . . . . . . . . . . . . . . . . . 8 locations for valet/program switch . . . . . . . . . . . . 8 locations for the optional starter kill relay . . . . . . . 9 locations for the relay satellite. . . . . . . . . . . . . . . 9 finding the wires you need . . . . . . . . . . . . . . . . . . . 9 obtaining constant 12V . . . . . . . . . . . . . .. . . . . . 9 finding the starter wire . . . . . . . . . . . . . . . . . . . 10 finding the 12V switched ignition wire. . . . . . . . . 10 finding the tachometer wire . . . . . . . . . . . . . . . . 11 finding the wait-to-start bulb wire for diesels . . . 11 finding the accessory wire . . . . . . . . . . . . . . . . . 11 finding the door pin switch circuit . . . . . . . . . . . 12 finding a (+)parking light wire. . . . . . . . . . . . . . 12 making your wiring connections. . . . . . . . . . . . . . . 13 primary harness (H1), 12-pin connector . . . . . . . . . 14 secondary harness (H2), 6-pin connector . . . . . . . . 14 door lock harness, 3-pin connector. . . . . . . . . . . . . 15 remote start primary harness, 7-pin connector . . . . 15 heavy gauge inline connector key switch interface .16 remote start secondary harness (H3), 5-pin connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 primary harness (H1) wire connection guide. . . . . . 17 secondary harness (H2) wire connection guide . . . . 21 relay key switch interface wire connection guide. . . 24 remote start secondary harness (H3) wire . . . . . . . . connection guide . . . . . . . . . .. . . . . . . . . . . . . . . 25 neutral safety switch interface. . . . . . . . . . . . . . . . 27 testing the neutral safety switch. . . . . . . . . . . . . 27 bypassing GM vehicle anti-theft systems (VATS) . . . 30 1995 and newer vehicle anti-theft systems . . . . . . . (immobilizers) . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 passlock I and passlock II (PL-1 and PL-2) . . . . . .31 passkey III (PK-3), transponder-based systems . . . 31 plug-in LED and valet/program switch . . . . . . . . . . 32 programmer interface, 3-pin black plug . . . . . . . . . 32 shock sensor harness, 4-pin connector . . . . . . . . . . 33 tach learning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 programming jumpers . . . . . . . . . . . . . . . . . . . . . . 34 light flash (+)/(-)...