OK, here is the wiring from the 4806 to the Altima.
H/1 RED (+)12VDC CONSTANT INPUT +12V Constant
H/2 BLACK (-) CHASSIS GROUND Chassis Ground
H/3 BROWN (-) 200mA HORN HONK OUTPUT GREEN (-) @ HORN SWITCH, YELLOW 6-PIN PLUG, PIN 3
H/4 WHITE/BROWN LIGHT FLASH ISOLATION WIRE Not Used
H/5 WHITE PIN 30 of LIGHT FLASH RELAY set to (+) RED (+) dash fuse box, brown 16 pin plug, pin 1
H/6 ORANGE 500 mA GROUND WHEN ARMED OUTPUT Not Used
Remote Start, 8-pin connector
1 RED/BLACK (+) 12VDC CONSTANT INPUT +12V Constant
2 PINK/BLACK (+) FLEX RELAY INPUT 87A Not Used
3 PINK/WHITE (+) IGNITION 2 set to IGN2 Not Used
4 RED (+) 12VDC CONSTANT INPUT +12V Constant
5 VIOLET (+) STARTER OUTPUT Not Used
6 ORANGE (+) ACCESSORY OUTPUT White or Red at BCM Black 40 Pin plug, Pin 26
7 RED/WHITE (+) 12VDC CONSTANT INPUT Not Used
8 PINK (+) IGNITION 1 INPUT/OUTPUT White or Green at BCM Black 40 Pin plug, Pin 27
Auxiliary/Shutdown Harness 24-pin connector
1 PNK/WHITE (-) 200mA Ignition 2/Flex OUTPUTPink or Green at BCM Black 40 Pin plug, Pin 30 with 1N4001
2 BLUE/WHITE (-) 200mA 2ND STATUS /REAR DEFOGGER OUTPUT NU
3 RED/WHITE (-) 200mA TRUNK RELEASE OUTPUT NU
4 BLACK/YELLOW (-) 200mA DOME LIGHT OUTPUT NU
5 DARK BLUE (-) 200mA STATUS OUTPUT NU
6 WHITE/BLACK (-) 200mA AUX 3 OUTPUT NU
7 WHITE/VIOLET (-) 200mA AUX 1 OUTPUT NU
8 ORANGE/BLACK (-) 200mA AUX 4 OUTPUT NU
9 GRAY (-) HOOD PIN INPUT (NC OR NO) supplied by bypass module if car has Factory Alarm
10 BLUE* FACTORY HORN INPUT (Use Jumper to set polarity) NU
11 WHITE/BLUE ACTIVATION INPUTNU
12 VIOLET/WHITE** TACHOMETER INPUT supplied by bypass module
13 BLACK/WHITE*** (-) NEUTRAL SAFETYChassis Ground
14 GREEN/BLACK (-) 200mA FACTORY ALARM DISARM OUTPUT NU
15 GREEN** (-) DOOR INPUT NU
16 EMPTY ------------------------------------
17 PINK (-) 200mA IGNITION 1 OUTPUT NU
18 VIOLET** (+) DOOR INPUT NU
19 VIOLET/BLACK (-) 200mA AUX 2 OUTPUT NU
20 BROWN (+) BRAKE SHUTDOWN INPUT supplied by bypass module
21 VIOLET/YELLOW (-) 200mA STARTER OUTPUT to BCM Black 40 Pin plug, Pin 22 with 1N4001
22 GRAY/BLACK (-) DIESEL WAIT TO START INPUT NU
23 ORANGE (-) 200mA ACCESSORY OUTPUT NU
24 GREEN/WHITE (-) 200mA FACTORY ALARM ARM OUTPUT NU
Follow the DB3 guide for it's connections to the Altima. You might have to hardwire the Tach between the DB3 and the 4806. Depends on what Note 1 says.
Just so we don't overlook things...
The DB3 must be flashed with the 4.03 NISS08 firmware, presently at Version 1.20. Has this been done?
When you did the DB3 to vehicle programming after making all the connections, did it follow the steps and indications exactly?
The DB3 should handle the locks and alarm plus the transponder bypass funcions. It should also supply the Viper with the Brake,
Tach and Hood Pin signals via D2D. Do the door locks work via the Viper remotes?
Soldering is fun!