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?

hhdomains
0

Asked by hhdomains 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

DavidH25
Not Active

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.
hhdomains
0

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

DavidH25
Not Active

Ya got me on that one. Maybe somebody will know

John Saffrahn
16,165

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.
hhdomains
0

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?

John Saffrahn
16,165

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

Impala
Looking for a Used Impala in your area?
CarGurus has 58,073 nationwide Impala listings starting at $990.
ZIP:

Search Chevrolet Impala Questions

Chevrolet Impala Experts

#1 Danny Wang
Danny Wang
Reputation 980
#2 Tom Demyan
Tom Demyan
Reputation 680
#3 Justin Hatfield
Justin Hatfield
Reputation 630
View All

Related Models For Sale

Used Chevrolet Malibu"
1,539 Great Deals out of 72,747 listings starting at $855
Used Dodge Charger"
627 Great Deals out of 30,679 listings starting at $2,950
Used Honda Accord"
1,211 Great Deals out of 65,109 listings starting at $1,000
Used Chevrolet Camaro"
601 Great Deals out of 28,508 listings starting at $1,795
Used Nissan Altima"
1,494 Great Deals out of 79,548 listings starting at $995
Used Toyota Camry"
1,527 Great Deals out of 70,041 listings starting at $1,395
Used Nissan Maxima"
612 Great Deals out of 19,577 listings starting at $1,495
Used Ford Mustang"
1,025 Great Deals out of 25,369 listings starting at $1,329
Used Chrysler 300"
630 Great Deals out of 21,035 listings starting at $2,500
Used Ford Taurus"
547 Great Deals out of 18,938 listings starting at $800
Used Ford Fusion"
1,653 Great Deals out of 68,848 listings starting at $2,995
Used Dodge Challenger"
326 Great Deals out of 18,315 listings starting at $11,497
Used Chevrolet Tahoe"
988 Great Deals out of 33,202 listings starting at $2,500
Used Buick LaCrosse"
435 Great Deals out of 24,858 listings starting at $2,800

Used Cars For Sale

2014 Chevrolet Impala LT For Sale
80 Great Deals out of 5,033 listings starting at $13,545
2013 Chevrolet Impala LT For Sale
106 listings starting at $13,900
2012 Chevrolet Impala LT For Sale
16 Great Deals out of 430 listings starting at $10,700
2011 Chevrolet Impala LT For Sale
24 Great Deals out of 559 listings starting at $7,267