Here is what Audiovox lists:
       
            #1491: 1999 ISUZU RODEO 4DR SUV
     Audio/Mobile Video                                        
     WIRE          COLOR          POLARITY          LOCATION     
     Battery          RED / WHITE          (+)          RADIO HARNESS     
     Accesory          RED / YELLOW          (+)          RADIO HARNESS     
     Ground          BLACK          (-)          RADIO HARNESS     
     Illumination          GREEN/ RED          (+)          RADIO HARNESS     
     Dimmer          RED / YELLOW          (+)          RADIO HARNESS     
     LF Speaker (+)          BLUE     
     LF Speaker (-)          YELLOW     
     RF Speaker (+)          GREEN     
     RF Speaker (-)          GRAY     
     LR Speaker (+)          ORANGE     
     LR Speaker (-)          WHITE     
     RR Speaker (+)          ORANGE / BLUE     
     RR Speaker (-)          ORANGE / WHITE     
     Amp Location          NOT LIKELY     
     Radio Security          YES     
     Security                                        
     WIRE          COLOR          POLARITY          LOCATION     
     Battery          WHITE/ BLACK          (+)          OR WHT SWITCH HARNESS     
     Ignition 1          BLACK / YELLOW          (+)          IGNITION SWITCH HARNESS     
     Starter 1          BLACK/ WHITE          (+)          IGNITION SWITCH HARNESS     
     All Door Trigger          RED / GREEN          (-)          DRIVERS KICK WHT PLUG     
     Trunk Trigger          BLUE/DARK GREEN          (-)          LIGHT IN TRUNK     
     Alarm Disarm          YELLOW/BLUE          (-)          DKP WHT PLG, PULSE AT SAME TIME AS UNLCK     
     Alarm Arm          PPL     
     Parking Lights          GREEN/ RED          (+)          DR. SIDE KICK PANEL OR SWITCH     
     Convenience                                        
     WIRE          COLOR          POLARITY          LOCATION     
     Headlights-Lo          RED / BLUE          (-)          AT HEADLIGHT SWITCH     
     Wipers-Lo          BLUE / YELLOW          (+)          STEERING COLUMN     
     Trnk Release          RED / BLUE          (+)          SWITCH ON DASH     
     Remote Start                                        
     WIRE          COLOR          POLARITY          LOCATION     
     Battery          WHITE/ BLACK          (+)          OR WHT SWITCH HARNESS     
     Ignition 1          BLACK / YELLOW          (+)          IGNITION SWITCH HARNESS     
     Ignition 2          BLACK/ RED          (+)          IGNITION SWITCH HARNESS     
     Accessory 1          BLUE          (+)          OR BLU/BLK IGNITION SWITCH HARNESS     
     Starter 1          BLACK/ WHITE          (+)          IGNITION SWITCH HARNESS     
     Anti-Theft Descript          NONE     
     Key Sense          RED          (+)          IGNITION SWITCH HARNESS     
     Tachometer          BLACK/ RED          (-)          DRIVERS KICK 22 PIN PLUG     
     Speed Sense          BLUE/BLACK          (AC)          DRIVERS KICK 22 PIN PLUG     
     Parking Lights          GREEN/ RED          (+)          DR. SIDE KICK PANEL OR SWITCH     
     Brake Lights          RED          (+)          AT BRAKE SWITCH     
     Horn          GREEN          (-)          STEERING COLUMN HARNESS     
     Modules                                        
     WIRE          LOCATION                         
     Please select another category
     Doorlocks/Windows                                        
     WIRE          COLOR          POLARITY          LOCATION     
     Power Unlock          RED / BLUE          (-)          DKP WHT 22 PIN CON W/ DISARM     
     PowerLock          LIGHT GREEN/ RED          (-)          NEGATIVE TRIG KEYLESS ENTRY     
     LF Window Up          LF:BROWN / WHITE     
     RF Window Up          RF:BROWN / WHITE LR:BROWN / WHITE RR:BROWN / WHITE     
     LR Window Up          LF:BROWN / RED     
     RR Window Up          RF:BROWN / RED LR:BROWN / RED RR:BROWN / RED     
               
       Note: Audiovox makes no representation or warranty with respect to the above information including its accuracy, completeness, or its freedom from third parties' proprietary rights. Audiovox disclaims all liability or responsibility for errors or omissions therein or any decision made by the recipient in reliance thereon. The installer must verify any circuitry with the proper test equipment prior to installation.       
               
Installer, IT support, and FFL.  I need less hobbies.