2000 Toyota Avalon

The "Ground Output when Running" wire is the one you would normally use for a starter disable relay, I believe you are referring to the Orange wire. On the 3 wire plug, you don't need to use the red wire, but the green and blue are for locking and unlocking the doors. You need to find in your car which are the lock/unlock wires and connect there, but first make sure of the door lock system, in a Toyota it is usualy a negative type, and also I think it uses double pulse for unlock, so check it. If you have a remote start system it is important to hook up the hood pin switch, this will prevent somebody from accidently starting the car by a remote while the hood is open, however if you just have a regular alarm then there won't be no injuries. Let me know if this helped and if you need any further help.

okay thanks.  The info. was a big help.  I'll start the electrical install next week, time permitting, and let you know if I have any further questions.robbygtx

You have the wrong side. It's in the driver's kick panel, not passenger.......Located in a gray plug, with the wires going up to the instrument cluster.Jeff

Velocity Custom Home Theater

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Ground-when-running is used either to defeat the factory alarm during remote start, or to defeat the factory transponder-key anti-theft system, or both. Unless you have a factory alarm or the transponder key, this wire is not needed. As BulletTooth says, the hoodpin prevents the remote start from working when the hood is open. Imagine if you were changing a drive belt and you leaned over and pushed on the remote while it's in your pocket...not fun. Some installers choose instead to install a toggle switch inside the car to disable the remote start, and affix the warning sticker underhood. But using the actual hoodpin switch is safeer. Doorlock wires: The red 12V+ wire is just provided as a handy source of power if you need to use relays for your doorlocks. But it is probably limited to 1 amp or so...it's only enough power to drive the relays themselves; not the actual doorlock motors. You may take advantage of this wire if you wish, or you may just cut it off and get your 12 volts elsewhere. For doorlocks on that car, you have two options---both require extra labor, but either method will work if you're patient. You can perform a "5-wire" setup on the thick motor wires coming out the right side of the fusebox; this will require three relays. Alternately, you can run wire all the way inside one of the two front doors, where only one relay will be needed. If your Avalon has a factory alarm, you MUST do this in the door; this is just about the only way to arm and disarm the factory alarm. Also, if you do it in the door, the factory domelight will kick on when you unlock the doors. If you do the 5-wire setup inside the car, you may also want to connect your alarm's illuminated entry output---I can also tell you how to do this easily (and without buying another relay), if you get to that point. Do a search for "avalon"; there is a post someplace where I outline both doorlock methods.