Heated Mirrors Defroster Switch

Fza · Post by **Fza** » Fri Apr 21, 2006 12:48 pm

I searched and didnt find what i needed, I need to know how to wire my heated mirrors correctly, I can get them to heat up but i cant get them to heat up from the switch there are 4 wires coming from the switch, Gray is the dimmer, Brown is ignition , white =? black is ground. I can only get the mirrors to heat up when they are connected to the brown wire. Does anyone know how the heated mirrors are wired? 2002 s-10 with rds radio

Fza · Post by **Fza** » Sat Apr 22, 2006 6:53 am

anyone know?

Post by **HenryJ** » Sat Apr 22, 2006 7:06 am

Orange wire from the relay to the mirror. White wire goes from the switch to the relay.

Fza · Post by **Fza** » Sat Apr 22, 2006 8:25 am

hum, ok well where would this relay be or do i have to wire my own?

Post by **HenryJ** » Sat Apr 22, 2006 8:33 am

The relay is in the underhood power distribution center.

Fza · Post by **Fza** » Sat Apr 22, 2006 8:36 am

is it RR defog?

Post by **HenryJ** » Sat Apr 22, 2006 8:40 am

yes

GM data wrote:Outside Mirror Description and Operation Heated Mirrors
Heated Mirror System Components

The heated mirror system consists of the following components:

* RR Defog relay
* HVAC control module
* Left outside power mirror
* Right outside power mirror
* HTD MIRROR 10A fuse

Heated Mirror System Controls

The heated mirror system is activated by depressing the rear window defogger switch, which is part of the HVAC control module. For further information on the rear window defogger operation, refer to Rear Window Defogger Description and Operation
Heated Mirror System Operation

The heated mirror system operates in parallel to the rear window defogger. Each outside rearview mirror contains a heating element that is connected to a constant ground source. When the rear window defogger system is active, battery voltage is available at the HTD MIRROR fuse and to the outside rearview mirrors through the heated mirror supply voltage circuit. The mirrors will heat up to remove ice, snow or frost and will automatically deactivate when the rear defogger system has timed out, approximately 10 minutes.

Fza · Post by **Fza** » Sat Apr 22, 2006 8:43 am

ok, do you know where the wire is located? or could I jsut tap into it under the relay?

Fza · Post by **Fza** » Sat Apr 22, 2006 8:58 am

I looked under the relay and checked the pins and there are no wires going to the relay figures lol, so any suggestions on how I could wire it up?

Post by **HenryJ** » Sat Apr 22, 2006 9:05 am

Check to see if you have the relay. If it is there check to see if it has the orange wire coming from it. If it does that goes to the firewall connection and from there to the connector for the mirror.
I would say that you have choices.

If the relay is not there you could add it and the associated wiring into the distribution center. It takes some work , but is a nice , clean, factory way to install.
For the relay the white wire is from the switch and grounds the relay to activate it. You will need a hot in run and start as well as a hot all the time and the orange wire to the mirror.
The white wire from the switch is to activate the relay via grounding. This means you could add your own relay down there if you wish and run straight to your mirrors. You may not have the advantage of the timed shut off though. This could drain a battery or worse toast a mirror?
The white wire comes from the HVAC control and may already have the timed delay integrated. Of that I am unsure?

There may be much more to all this than I know. Don't take my word here as gospel. I am shooting from the hip here as I have not looked into this in the depth that it may require.

Fza · Post by **Fza** » Sat Apr 22, 2006 9:08 am

Ok I checked the relay is there but the ornage wire is not, i guess it would be easier to just add the relay down my the heater/ac controls since i already have all the wires there, now the thing is how am i wireing th relay?

Post by **HenryJ** » Sat Apr 22, 2006 9:16 am

Re read my last post. I edited it to add some information.

Fza · Post by **Fza** » Sat Apr 22, 2006 9:18 am

Ok, so basicly I have to run the white wire and the orange wire to the unhood relay, Ive tried looking for Wire diagrams but i cant seem to find any for the heated mirrors and rear defrsoter

Fza · Post by **Fza** » Sat Apr 22, 2006 9:20 am

I do want the timed delay too, so i guess wireing to the underhood relay would be best, I just need to wire diagram to know where the wires hook up too

Fza · Post by **Fza** » Sat Apr 22, 2006 10:53 am

Ok, i got it wired to to a relay and works so when i press the button the mirrors heat up, but right now i checking to see if they go off after 10mins so, but thanks for your help Henryj

Fza · Post by **Fza** » Sat Apr 22, 2006 10:56 am

Ok, they do go off after 10mins lol, So i guess the timer is built into the Defroster button. Im happy now have heated mirrors in California hehe

Post by **HenryJ** » Sat Apr 22, 2006 11:10 am

Fza · Post by **Fza** » Sat Apr 22, 2006 11:18 am

oh, and tonite I can test of how good the auto dim side mirror is hehe

Fza · Post by **Fza** » Sun Apr 23, 2006 6:43 pm

I just need to get the correct switch now lol I need to get the switch cover for the heated mirrors, right now i have the one for the rear defroster,

left is the one i have, right is the one i need, but it should be easy all I have to do is change the button covers, looks like im off to the Pick-a-part