This mod does something similar to the "windows powered for 30 seconds after key off" feature on our Elantras (when equipped with factory keyless/alarm).  What this mod does is it disengages the "door open" cut-off of the power window circuit, while also replacing the stock 30-second power timer (built-in to our ETACS) with a 2-minute timer (or any duration that you program into the programmable pulse timer relay).  In addition, the headlight circuit is wired into this relay such that the headlights will stay on for the programmed time, if you leave the headlight switch on.  This is handy when you come home to a dark house and fumble around for your keys.

The mod involves splicing into only four wires, but they are all located at the fuse box, which is hard to get to.  Getting to the fuse box is the most difficult part of this DIY.

Materials:

·        PAC TR7 Pulse Timer Relay (about $25 online, do a Google search)

·        Diode (1N4001), available at Radio Shack for less than $1

·        Small lengths of wire, anything from 16-20 gauge is fine

·        Solder and solder gun, and electrical tape

Procedure:

(Steps in blue text refer to PAC TR7 programming steps)

1.      Disconnect the battery.

2.      Remove the driver's side lower crash panel, remove the metal plate behind it, unbolt the fuse box and pull the fuse box down several inches so that you have access to all the connectors plugged into it. Consult webtech if you need help doing this.

3.      Splice the TR7 black wire (ground) to chassis ground.

4.      Splice the TR7 red wire TEMPORARILY to switched power (e.g., splice the wire temporarily into fuse 1, 2 or 3).

5.      Follow the TR7 instructions for programming option #6.  They will be detailed in the instructions that come with the relay, but I've re-written them in a simpler way here:

·        Switch key to OFF position.

·        Slide the programming switch to the ON position.

·        Switch key to ON position.

·        Pulse the TR7 brown wire (- trigger) 6 times by touching it solidly to chassis ground.

·        Wait 3 seconds, and count the number of LED flashes.  It should be 6 to indicate your programming feature is in memory.

·        Next, pulse the brown wire 1 time to activate the timer.

·        The LED should flash once rapidly to confirm that you need to program in the minutes.

·        Pulse the brown wire 2 times to program "2 minutes". If you wish to program the timer for
3 minutes", pulse the brown wire 3 times, etc.  After 3 seconds the LED should flash two times to confirm.

·        The LED will now flash twice rapidly to confirm that you need to program in the seconds in tenths place.

·        Don't pulse, and wait three seconds.

·        The LED will now flash three times rapidly to confirm that you need to program in the seconds in ones place.

·        Don't pulse, and wait three seconds.

·        The LED will now flash four times rapidly to confirm that the timer is finished recording.

·        The LED will also flash rapidly for three seconds to indicate that programming is finished.

·        Slide the programming switch to the OFF position.

·        Switch key to OFF position.

6.      Remove the TR7 red wire from the temporary switched power source.

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Refer to the fuse box schematics and splice junctions below for the following steps:

7.      Splice the TR7 red wire (power) to I/P-D pin 8 (red).

8.      Splice the TR7 blue wire (+ output) to I/P-B pin 9 (red/black). This pin provides 12V to the headlamp relays when the key is on, and in this setup also will provide 12V to the headlamp relays when the TR7 is activated. Diode protect the wire using a standard 1N4001 diode so that the TR7 doesn't feed 12V back into the junction box (see schematic below, and note the direction of the diode by the silver stripe on the diode barrel).

9.      Splice the TR7 green wire (+ input) to I/P-B pin 11 (red/orange). This will provide the (+) input to the TR7 whenever the key is switched on.

10. Splice the TR7 white wire (- output) to I/P-F pin 12 (grey). This pin supplies ground to the power window relay.

11. The TR7 orange and brown wires will not be used.

12. Reassemble the fuse box, crash pad plate and cover, and re-connect the battery.

(Front side of passenger compartment fuse box)

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(Rear side of passenger compartment fuse box)