Gray key? transponder chip - need a bypass module
Factory Alarm? need some relays and resistors
I'll assume no to both as you did not mention a bypass module ( and you have done R/S's before ).
Avital 4103 and 2004 RAM 1500
H1/1 LIGHT GREEN/ BLACK FACTORY ALARM DISARM not used
H1/2 GREEN / WHITE FACTORY REARM not used
H1/3 YELLOW (+) IGNITION OUT (TO ALARM) not used
H1/4 WHITE/ BLUE (-) ACTIVATION INPUT not used
H1/5 ORANGE (-) GROUND WHEN LOCKED not used
H1/6 BROWN (-) HORN OUTPUT DARK GREEN/ PURPLE (-) @ STEERING COLUMN HARNESS
H1/7 RED / WHITE (-) TRUNK RELEASE OUTPUT not used
H1/8 BLACK GROUND Chassis Ground
H1/9 WHITE (+/-) LIGHT FLASH Set to (+) and use a relay as per diagram :
http://diagrams.marktoonen.nl/DOWNLOADS/32277_RAM-FULL-SIZE-PICKUP-_CHRYSLER%20PARKING%20LIGHT%20DIAGRAM.pdf
H2/1 BLACK/ WHITE (-) NEUTRAL SAFETY SWITCH INPUT Chassis Ground ( auto trans! )
H2/2 VIOLET/WHITE TACHOMETER INPUT WIRE dk. blue/gray ac @ PCM, orange plug, pin 34
H2/3 BROWN (+) BRAKE SWITCH SHUTDOWN WIRE WHITE/ TAN (+) @ SWITCH ABOVE BRAKE PEDAL
H2/4 GRAY (-) HOOD PINSWITCH SHUTDOWN WIRE to kit supplied hood pin
H2/5 BLUE/WHITE (-) 200mA 2ND STATUS/REAR DEFOG not used
4-pin satellite harness diagram
1 BLUE STATUS OUTPUT not used
2 ORANGE (-) ACCESSORY OUTPUT not used ( might be used w/relay - see Note 8 below )
3 PURPLE (-) STARTER OUTPUT not used
4 PINK (-) IGNITION OUTPUT not used
Heavy gauge relay wiring diagram
1 PINK (+) (30 AMP) OUTPUT TO IGNITION CIRCUIT PINK/WHITE (+) @ IGNITION SWITCH HARNESS
2 PURPLE (+) (30 AMP) OUTPUT TO STARTER CIRCUIT YELLOW (+) @ IGNITION SWITCH HARNESS
3 ORANGE (+) (30 AMP) OUTPUT TO ACC CIRCUIT DARK BLUE (+) See NOTE *8 @ IGNITION SWITCH HARNESS
4 RED (+) (30A) HIGH CURRENT 12 INPUT RED (+) @ IGNITION SWITCH HARNESS
5 PINK/WHITE (+) PROGRAMMABLE OUTPUT Pink/Lt. Green (+) @ ignition harness
6 RED (+) (30A) HIGH CURRENT 12V INPUT RED (+) @ IGNITION SWITCH HARNESS
NOTE *8 On some Full Size Trucks with Climate Control it may be necessary to connect (3) extra Accessory wires.
PINK / YELLOW 16 gauge & PINK / YELLOW 14 gauge and the DARK BLUE Accessory #1 to turn on the A/C Compressor.
Door lock harness, 3-pin connector
1 BLUE (-) UNLOCK OUTPUT to Directed 451M Door Lock Module
2 EMPTY NOT USED
3 GREEN (-) LOCK OUTPUT to Directed 451M Door Lock Module
You could use a couple of relays & resistors and this diagram :
http://diagrams.marktoonen.nl/DOWNLOADS/14301_RAM-FULL-SIZE-PICKUP-_DODGE%20RAM%2004-05%201%20WIRE%20JBS%20UNITS.pdf
You will need to make a programming changes to the 4103 for Tach Mode and Horn Honk.
Soldering is fun!