Can the rear defrost in a 2009 Impala be set to stay in the on position so it will activate automatically when the vehicle is started?

Asked by Nov 29, 2012 at 12:33 PM about the 2009 Chevrolet Impala LT

Question type: Maintenance & Repair

I had a remote starter installed but it would be far more useful if the rear defrost would also activate
when the vehicle is started.

6 Answers

Yes it's possible but would be a custom electrical job for a professional. They use a great deal of amperage and that's why they shut themselves off when the engine is not running , the battery would go dead very quickly

2 out of 2 people think this is helpful.

Thank you for the response. Would this require an additional interface for a remote car starter that could be added post installation?

Ya got me on that one. Maybe somebody will know

33,375

Yes it could be added. It would be wired into the ignition power wire coming out of the remote start using a diode and a relay. You hit the remote start, the car starts, there will be an ignition wire that stays hot and once the remote start timer runs out the power will be removed from that wire. That wire will have to be cut and a diode put in so electricity can't back feed to the remote start box and then splice the relay in between the diode and the remote start box. Without the diode the rear defrosters will be stuck on every time you turn the key on because power will back feed into the remote start wire and trigger the relay. Like david said, yes and also like david said, have a pro do it. If someone says its not possible print this page out and take it to them. Anyone who is well versed in electrical will completely understand what I have written and be fully capable of carrying it out.

1 out of 1 people think this is helpful.

Thank you John. Don't worry, these are not things I even attempt. When it comes to vehicles I always go to someone who knows what they are doing. Just trying to narrow down the possibilities. One more question. The starter I have has different options for each button. For instance if you push the button and release it one event will occur but if you press and hold another event will occur. Would one of these buttons work for both starting the vehicle and activating the defrost?

33,375

Its quite possible but I'm not certain as to how yours is setup. Some are set up so you can add features like opening an electronic trunk release. If you were to figure out which wire on the box became active with that button, yes you could but it would have to stay "hot". If you tap into one that is similar to the trunk release wire then the rear defrosters would turn on for only a few seconds. If you know the make and model of your alarm you should easily be able to find all the info you need online regarding features. Let's say one of those button combinations turned on headlights, doubtful but just an example, the wire that feeds power for that would be perfect. Getting back to the other set up after thinking about it you could just tap directly into the defroster relay that is already there as long as you put a diode into the wire going to the defroster relay. If only you would have gotten the 09 with the factory installed remote start.

Your Answer

Add photo

Related Questions

  • 2009 impala 3 answers

    Reduced engine power light on after needing jump-started. Will only go 50mph

    2009 Chevrolet Impala LS

    -

    Maintenance & Repair

  • Why wont the Gear shift lever button on 2006 chevy impala engage to move out of park? 39 answers

    My gear wont release out of park. first time it did it i pushed the brake down to the floor and it relased now it wont release at all. it starts up fine my steering wheel releases just not my shifter.

    2006 Chevrolet Impala

    -

    Maintenance & Repair

  • 2009 Chevy Impala will only blow cold air 1 answer

    Was working fine earlier this fall but now it will only blow cold air. Blower/fan is pushing good volume of air but it will not heat up. At times it seems like it is starting to warm up but then blo...

    Chevrolet Impala

    -

    Maintenance & Repair

  • What would make a 2009 chevy impala run hot? 3 answers

    It happened on a morning where it was 9 degrees outside. The defroster never blew out hot air, it was all cold and once the car started moving the temp hand went past the halfway mark. Looked under ...

    2009 Chevrolet Impala LS

    -

    Maintenance & Repair

  • 2008 Impala LS Homemade Dual Exhaust? 40 answers

    So I was thinking about rigging up my own dual exhaust. Just cutting off the exhaust where the headers meet and then using a Y pipe to break the exhaust off to each side with a muffler on each side. ...

    2008 Chevrolet Impala LS

    -

    Car Customization

Impala

Looking for a Used Impala in your area?

CarGurus has 29,805 nationwide Impala listings starting at $799.

ZIP:

Search Chevrolet Impala Questions

Chevrolet Impala Experts

#1 Js08016
Js08016
Reputation 1,750
#2 Danny Wang
Danny Wang
Reputation 1,640
#3 Tom Demyan
Tom Demyan
Reputation 1,540
View All

Related Models For Sale

Used Chevrolet Malibu
851 Great Deals out of 81,335 listings starting at $995
Used Dodge Charger
283 Great Deals out of 27,252 listings starting at $2,250
Used Chevrolet Camaro
149 Great Deals out of 32,803 listings starting at $1,995
Used Honda Accord
786 Great Deals out of 88,035 listings starting at $1,150
Used Chrysler 300
347 Great Deals out of 20,484 listings starting at $1,000
Used Dodge Challenger
110 Great Deals out of 24,208 listings starting at $8,256
Used Nissan Maxima
287 Great Deals out of 26,452 listings starting at $1,300
Used Nissan Altima
859 Great Deals out of 79,907 listings starting at $1,800
Used Buick LaCrosse
174 Great Deals out of 22,192 listings starting at $990
Used Ford Mustang
389 Great Deals out of 47,165 listings starting at $1,999
Used Ford Fusion
1,040 Great Deals out of 85,005 listings starting at $1,900
Used Chevrolet Tahoe
577 Great Deals out of 27,599 listings starting at $1,500
Used Chevrolet Silverado 1500
1,748 Great Deals out of 169,764 listings starting at $1,800
Used Toyota Camry
821 Great Deals out of 90,855 listings starting at $850
Used Ford Taurus
237 Great Deals out of 20,409 listings starting at $1,100

Used Cars For Sale

2017 Chevrolet Impala LT For Sale
26 Great Deals out of 3,978 listings starting at $17,599
2016 Chevrolet Impala LT For Sale
21 Great Deals out of 895 listings starting at $15,499
2015 Chevrolet Impala LT For Sale
4 Great Deals out of 414 listings starting at $13,995
2014 Chevrolet Impala LT For Sale
8 Great Deals out of 427 listings starting at $10,495
2013 Chevrolet Impala LT For Sale
119 listings starting at $7,190