2000 taurus wagon / viper 571

Hi All,

I have a Viper installed in my 2000 Ford Taurus Wagon and would like to get the rear window defrost connected to the Viper 571 Remote Start.  I have the install manual and understant the it is the "Blue/White (-) 200mA 2nd status/defogger" wire that gets connected to????  I have look at the wiring diagram and it shows what looks like a switch(button) that powers the defroster,  to a Light Emitting Diode, to a 1.2k  Resistor, to a 10A Fuse, to a Rear Window Defrost Relay, (87 terminal),  in a Central Junction Box under drivers side dash. 86, 85, and 30 terminals are on this relay.

My question is: Can I connect the Blue/White (-) 200mA 2nd status/defogger  to the wire behind the defrost switch after the 1.2 k Resistor, and then the Rear Window Defroster Relay would feed the defrost circuit??

Thanks for all who look at this question.

Rich

Hey T&t Tech,

Thanks for the replay.  Any guideance as to what wire to connect to with a relay or ??? 

Thanks

Rich

hey again,

Is ther a way, or should I just be sending 12 volts to the defrost grid with a relay, bypassing the entire cars relays, switches, and other componants??

Rich

All Right!...Here is what I have found:

1 The input to the defrost switch is BD/OG and has 11.5 positive volt in.  Ignition off. 

2. The output from the defrost switch is DG/VT and also has 11.2 positive  volts at it.       Ignition on and defrost button pressed to ON.                                     NO VOLTAGE AT THIS WIRE WHEN THE IGNITION IS OFF.

3. Both of these wires come in/out of a "Intergrated Control Panel"  which is where the CD player, and all climate controls are.  This is connector C2009 in my taurus wiring diagram book.  It also has all of the audio wiring,( Power, Speaker, audio system on, volatge .....)

When I press the defrost button on and off I hear a clicking at the "Central Junction Box", and that is where a SPDT relay is for the Rear Window Defrost. There is constant voltage on pin 30 with ignition on or off.  The is voltage on pin 85 when the ignition is on.

I did find a BN/LB wire under the drivers side sill cover that has 0 voltage when off,  .02 volts positive when on remote start, (defrost button off), and 14.5 volts positive when on remote start with the defrost button turned on. ( Had to press it to ON in the remote start mode).

4. In the remote start mode my radio works, heater fan works, power windows work, wipers work, parking lights come on, dash lights come on, and the rear window defrost will come on ONLY if you press the button.

I had this Viper installed by an authorized dealer about 18 months ago.  So, with all of the above info, can i simply connect a 12 volt source to the BN/LB wire under the drivers sill cover using a relay in conjuction with the Blue/White (-) 200mA 2nd status/defogger ??  Or should I be looking at something else or other wires or???...........

Thanks again,

Rich