the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
icon

Remote Start Runs Rear Defog, 99 Silverado - FYI


Post ReplyPost New Topic
< Prev Topic Next Topic >
captntech 
Member - Posts: 13
Member spacespace
Joined: August 26, 2003
Location: United States
Posted: September 19, 2003 at 10:34 AM / IP Logged  

This works on a 99 Silverado or probably any non-databus rear defog.

I've figured out a way to run the rear defog/heated mirrors using the trunk pop button on a remote starter (Crimestopper RS-900 in my case). There is a white wire coming from the HVAC module that is a ground trigger from a timer inside the HVAC module. You can tap into this ground trigger wire (goes to a relay under the hood to activate the defog circuit). I purchased a timer relay circuit board made by Elk (Model 960 Timer) and got it for $28 shipped from Bass Home Products:

http://www.bass-home.com/ProductDetail.cfm?cfid=391008&cftoken=46415239&ProdID=88018

Installation: connect the +12v to constant power (it automatically runs a timer cycle when you put power to it so you don't want it on keyed power). Connect ground to GND and strap a wire from GND to COM(mon). Connect a wire from NO to the white wire coming from the HVAC. Set the timer to 10 sec until you have applied power, let it run a timed event, then change the jumper to min. Connect your remote trunk pop trigger wire to the TRIG on the timer. I also added an amber status light on the dash to indicate that the timer was on. I used a 12v LED in amber housing from Radio Shack and connected the positive to keyed +12v and the negative to the NO on the timer. Pressing the trunk pop activates the trigger which activates the timer which activates the defog circuit and turns on the status light. After the timed event ends, the circuit opens and shuts down. Do not run the defog without the engine running, you'll run down the battery. Good Luck.


Sorry, you can NOT post a reply.
This topic is closed.

  Printable version Printable version Post ReplyPost New Topic
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum

  •  
Search the12volt.com
Follow the12volt.com Follow the12volt.com on Facebook
Friday, March 29, 2024 • Copyright © 1999-2024 the12volt.com, All Rights Reserved Privacy Policy & Use of Cookies
Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

Secured by Sectigo
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
Support the12volt.com
Top
the12volt.com spacer
the12volt.com spacer