2003 Lexus ES300 Trunk Release Wiring

Installing a viper 4706v on a 2003 lexus es300, in the wiring diagram for trunk release it says to use the "5-wire" method. However I am trying to determine if the car has a negative or positive trunk polarity/release because there are diagrams for each type. Can someone help with this question and let me know how to wire this up? Thank you, Mike

Your Viper has only a (-) Trunk Release Output as shown below : RED/WHITE (-) 200mA TRUNK RELEASE OUTPUT The only info I can find for your 2003 ES300 is this : TRUNK RELEASE     WHITE/BLUE (5-WIRE)     IN DRIVERS KICK PANEL Here is a link to the relay wiring diagram from Bulldog Security : http://diagrams.marktoonen.nl/DOWNLOADS/17044_ES300_5-WIRE%20TRUNK%20RELEASE%20DIAGRAM.pdf A few notes : You need a 30/40 Amp SPDT Bosch style relay with 5 wire harness. You need an inline fuse holder with 10 Amp fuse. You will use the top diagram. Your relay harness wire colors / positions will probably not match the diagram. Basically it will go like this using relay pin numbers : Relay Pin 85 to Viper RED/WHITE (-) 200mA TRUNK RELEASE OUTPUT Relay Pins 86 and 87 to +12V constant through the 10 Amp fuse Relay 87a to the cut WHITE/BLUE wire IN DRIVERS KICK PANEL going towards front of the car Relay Pin 30 to the cut WHITE/BLUE wire IN DRIVERS KICK PANEL going towards rear of the carSoldering is fun!

Thank you!

howard, if you are using a diode from 85 to 86, which is a negative to a constant power source....is that going to be a problem? I don't understand much about diodes...so i apologize in advance. thank you. According to the diagram...i am fusing 86&87 with 12v constant and 85(-) is the trunk wire from the unit.

The diode stops back feed, around 200 volts when the relay shuts down, it can destroy the circuits above, also known as a quenching diode. Well worth spending a few cents.