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2008 Trailblazer HVAC not working Viper 4706v


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zsoccerdude17 
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Joined: November 05, 2016
Location: Montana, United States
Posted: January 05, 2017 at 9:17 PM / IP Logged Link to Post Post Reply Quote zsoccerdude17
I installed a Viper 4706 V on my parents trailblazer a few weeks back. I noticed the HVAC was not working at all with the orange acc wire from the viper going to the orange acc wire in the blazer side. So I then spliced it into the brown on the blazer side as well. Still nothing. What am i missing here?? Wipers do not work either, which makes me think the orange acc wire from the viper isnt supplying power to it? Do I need to turn Acc1 on with the LCD remote?? Kind of at a loss here.
smokeman1 
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Posted: January 05, 2017 at 9:48 PM / IP Logged Link to Post Post Reply Quote smokeman1
You could test the output of the Orange wire from the 4706 to see if there is any voltage on it.
Do you have the Red, RED / Black, and RED / White fused wires from the heavy gauge wire harness connected to a 12 volt source?
When all else fails, Read the Instructions
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Mark Mizenko 
Copper - Posts: 460
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Joined: October 13, 2004
Location: Pennsylvania, United States
Posted: January 05, 2017 at 10:24 PM / IP Logged Link to Post Post Reply Quote Mark Mizenko
2 ignitions and 2 accessorys on that vehicle, you powering both?
zsoccerdude17 
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Joined: November 05, 2016
Location: Montana, United States
Posted: January 05, 2017 at 10:45 PM / IP Logged Link to Post Post Reply Quote zsoccerdude17
I didnt see a strait forward ACC2 wire in the big wiring harness on the viper, so i used orange and ran it to both. And yes i do believe I have both ignitions connected. I know I left one of the reds and/or one of the pinks disconnected, I used the Directech install guide, if that helps anything.
chev104275 
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Posted: January 06, 2017 at 4:59 AM / IP Logged Link to Post Post Reply Quote chev104275
Never splice circuits together. They are separate for a reason. Can you list all your connections for us. So we can get a better picture of what's going on.
If i Can't Install it    I Don't need it   Joe
kreg357 
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Posted: January 06, 2017 at 6:44 AM / IP Logged Link to Post Post Reply Quote kreg357
On the 4706, the thin Red and the thick Red, RED / White and RED / Black all must go to +12V constant power.
You can use the Vipers thin Orange (-) 200mA Accessory output to control an external relay for the ACC2 circuit. Relay wiring
Relay Pin 85 to Viper thin Orange (-) 200mA Accessory
Relay Pin 86 and 87 to +12V constant through 20 Amp fuse
Relay Pin 30 to Brown ACC2 wire
Relay Pin 87a not used - insulated
Soldering is fun!
zsoccerdude17 
Member - Posts: 20
Member spacespace
Joined: November 05, 2016
Location: Montana, United States
Posted: January 07, 2017 at 5:00 PM / IP Logged Link to Post Post Reply Quote zsoccerdude17
Ive got it in the shop right now, and the RED / black and pink/black are not hooked up. So I will get that R/B to 12v constant and see how that helps
zsoccerdude17 
Member - Posts: 20
Member spacespace
Joined: November 05, 2016
Location: Montana, United States
Posted: January 07, 2017 at 5:05 PM / IP Logged Link to Post Post Reply Quote zsoccerdude17
That did the trick! Now I'm going to unsplice the 2 ACC wires and just power one. If I want HVAC this should be the brown wire correct?
zsoccerdude17 
Member - Posts: 20
Member spacespace
Joined: November 05, 2016
Location: Montana, United States
Posted: January 07, 2017 at 5:28 PM / IP Logged Link to Post Post Reply Quote zsoccerdude17
For future reference that is wrong. Brown is wipers and such. Orange is HVAC and defrost.
Mark Mizenko 
Copper - Posts: 460
Copper spacespace
Joined: October 13, 2004
Location: Pennsylvania, United States
Posted: January 07, 2017 at 9:10 PM / IP Logged Link to Post Post Reply Quote Mark Mizenko
We know that ;)
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