2000 xterra ac issue

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=125800
Printed Date: May 12, 2025 at 8:14 PM

Topic: 2000 xterra ac issue

Posted By: cookeyed00
Subject: 2000 xterra ac issue
Date Posted: January 22, 2011 at 2:02 PM

First and foremost I want to say this site is awesome!!!
Now on to the issue. I just installed a Viper 791xv in a 2000 Xterra but when I try to turn on the heater without the key in the Run position, the heater doesn't turn on. Any advise???

Replies:

Posted By: tony_g
Date Posted: January 22, 2011 at 2:26 PM

did you power all ignition and acessory wires? one thing ive read and learned a lot from here is if youre vehicle has xx amount of ignition acessory or starter wires you should simulate what using the key does and power all the wires. how many do you have, vehicle wiring on here shows 1 starter, 2 ignition and 1 acessory, how many did you find with the dmm

Posted By: kreg357
Date Posted: January 22, 2011 at 2:35 PM

There seems to be some conflicting info on the ignition wires for this vehicle.

Here is info from Audiovox:

Battery        WHITE/ BLACK (+)     IGNITION SWITCH HARNESS
Ignition 1     BLACK/ WHITE (+)     IGNITION SWITCH HARNESS
Ignition 2     RED / YELLOW (+)      IGNITION SWITCH HARNESS
Accessory 1    WHITE/ BLUE (+)      IGNITION SWITCH HARNESS
Starter 1      BLACK / YELLOW (+)    IGNITION SWITCH HARNESS
Starter 2      BLACK/ GREEN (+)     IGNITION SWITCH HARNESS

Here is info from Bulldog Security:

12 VOLT CONSTANT            GREEN (+)           IGNITION SWITCH HARNESS
STARTER                     BLACK / YELLOW (+)    IGNITION SWITCH HARNESS
STARTER 2                   GREEN/ YELLOW (+)    IGNITION SWITCH HARNESS - must be powered for cold starts
IGNITION 1                  BLACK/ WHITE (+)     IGNITION SWITCH HARNESS
IGNITION 2                  N/A
IGNITION 3                  N/A
ACCESSORY /HEATER BLOWER 1   RED / YELLOW (+)      IGNITION SWITCH HARNESS
ACCESSORY /HEATER BLOWER 2   N/A

Here is info from this site:

Constant 12V+    Green           Ignition Switch Harness
Starter          BLACK / YELLOW    Ignition Switch Harness
Ignition         BLACK/ White     Ignition Switch Harness
Ignition 2       RED / Yellow      Ignition Switch Harness
Accessory        WHITE/ Blue      Ignition Switch Harness

Looks like you will need to use your Digital Multi Meter to locate and verify the correct wires.
Sounds like you have a Accessory wire with no power.

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Soldering is fun!

Posted By: lectricguy
Date Posted: January 22, 2011 at 6:12 PM

Nissan's Field Service Manual data shows that the RED / Yellow Ignition 2 wire runs the blower motors, Heat & A/C. This signal is active in the "ON" position, and drops during start--functionally it is an accessory wire. Nissan also shows a GREEN/ YELLOW Starter 2.

This information is consistant with DEI/DirectWire info below:

12volts	green	+	ignition harness
Starter	BLACK / YELLOW	+	ignition harness
Second Starter	GREEN/ YELLOW	+	ignition harness
Ignition	BLACK/ white	+	ignition harness
Second Ignition
Third Ignition
Accessory	RED / yellow	+	ignition harness
Second Accessory	WHITE/ blue	+	ignition harness

Note: When doing remote start, this wire must be isolated from the key switch with the accessory relay. See Tech Doc 1077 for wiring information.

I agree with Kreg--use a multi meter to identify the correct wires. This should be standard practice for all wires during an install. The info here may help narrow your search.

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Lectric Guy