Anything i should know on a Lexus RX300

A lady wants me to install either a viper remote start or a python remote start (samething)on i believe it is a 1997 Lexus RX300. not sure if the year is correct. but i wanted to see if there is anything i need to know before i start, or will it be like installing on a toyota? if it is a '97 or a '98 i need the wiring diagram ( i only found '99 here). thanks in advance

98 Lexus Rx300

|       ITEM      |     WIRE COLOR     |POL|       WIRE LOCATION        |

|              12V|WHITE/ blue          |+  |ignition harness            ||          STARTER|BLACK/ white         |+  |ignition harness            ||         IGNITION|BLACK / YELLOW        |+  |ignition harness            ||  SECOND IGNITION|black               |+  |ignition harness            ||        ACCESSORY|pink                |+  |ignition harness            ||       POWER LOCK|see direct fax      |   |                            ||     POWER UNLOCK|document # 1070     |   |                            || PARKING LIGHTS +|green               |   |drivers kick panel *1       || PARKING LIGHTS -|GREEN/ red           |   |steering column             ||       HEADLIGHTS|RED / blue            |-  |steering column             ||     DOOR TRIGGER|RED / white           |-  |steering column *2          || DOME SUPERVISION|same as doors       |   |                            ||  TRUNK/HATCH PIN|WHITE/ red           |-  |drivers kick *3             ||         HOOD PIN|RED / blue            |-  |*4                          ||  FCTRY ALARM ARM|arms with lock      |   |                            ||FCTRY ALRM DISARM|disarms with unlock |   |                            || DISARM NO UNLOCK|blue/silver dots *7 |-  |steering column             ||       TACHOMETER|orange              |   |right of the fuse box *5    ||      SPEED SENSE|violet/white        |   |*6                          ||       BRAKE WIRE|GREEN / WHITE         |+  |at switch                   ||     HORN TRIGGER|WHITE/ red           |-  |steering column             ||           WIPERS|blue/blk - blue/red |+  |steering column             ||  LF WINDOW UP/DN|red   -   green     |A  |in door at motor            ||  RF WINDOW UP/DN|red   -   green     |A  |in door at motor            ||  LR WINDOW UP/DN|red   -   green     |A  |in door at motor            ||  RR WINDOW UP/DN|red   -   green     |A  |in door at motor            || SUN RF OPN/CLOSE|not recommended     |   |                            ||   SUN ROOF LIMIT|not recommended     |   |                            ||        RADIO 12V|WHITE/ blue          |+  |at radio                    ||     RADIO GROUND|brown               |-  |at radio                    ||     RADIO SWITCH|gray/red            |+  |at radio                    || RADIO ILLUMINATE|                    |   |                            ||    POWER ANTENNA|black               |+  |at radio                    ||       LF SPEAKER|pink   -   purple   |   |at speaker or amp *8        ||       RF SPEAKER|lt.green   -   blue |   |at speaker or amp *8        ||       LR SPEAKER|black   -   yellow  |   |at speaker or amp *8        ||       RR SPEAKER|red   -   white     |   |at speaker or amp *8        |

Notes:

NOTE:  This vehicle has an immobilizer system that needs to be bypassed when adding remote start.  Use DEI part number 555U or 555F.  *1  Located in a gray 15 pin plug.  *2  This wire goes to the key cylinder illumination ring and reads the delay.   *3  Located in a 20-pin plug, low in the kick panel.  Test only with a digital multi-meter as some of the multiplex wires in the car are WHITE/ red.  *4  In the engine compartment, under the relay box on the drivers side in a gray 17-pin plug, pin #1  *5  In a 10-pin plug.  *6  Coming from the cluster to the cruise control computer, it is located just above the drivers main fuse/relay box.  *7 This is the ignition key sense wire. Using the status output wire from the remote start to ground this wire will disarm the alarm without unlocking the doors.  *8 The amplifier is under the rear seat.

Luis

Sound Waves

Is up to the installer to test all wires with a DMM whenever possible.

yeah, theres a crazy doorlock/factory security interface you need to do in the drivers door, with 3 wires, a relay, and diodes. and also the autolights will stay on after the starter shuts off, so you need to pulse a doortrigger to shut off the lights after the starter shuts down. if you want a copy of the diagram email me and ill send it to you Mike specialized car audio chicago illinois