how do rear defrost buttons work?

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sofakingslow

Member - Posts: 15

Joined: December 15, 2005

Posted: April 01, 2009 at 10:20 PM / IP Logged

i am an idiot wrote:

Obviously he is not scared of relays. So even if it is a momentary switch, the simple latching relay is all he would need for Ignition and possibly for accessory. Other than the 4 relay latching relay possibilities, I really have no idea what he should run from.

I have done this before, only using rocker switches and a generic push-button start. All mounted on a piece of sheet metal resting on the exhaust hump. Worked great, up until the positive terminal made contact with the floorboard...

The only thing that really concerns me is this not working the first time I try it. Which brings to mind: As a new Mac convert, what program can i use to draw a schematic? I need someone to go over my wiring and connections before I actually begin this project.

I take it wireless applications are Kevin P's specialty?

i am an idiot

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Joined: September 21, 2006

Location: Louisiana, United States

Posted: April 02, 2009 at 2:33 AM / IP Logged

If you are using a Mac, I have no idea what you can draw with. Maybe a pencil and paper and a digital camera.

howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: April 02, 2009 at 3:05 AM / IP Logged

OK so I over reacted, the defrost switch itself can be momentary or latching depending on testing, the same aplies to the rear wash/wipe switch mentioned, what vehicle are we talking about here? My Crystal Ball says Civic/Golf

i am an idiot

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Joined: September 21, 2006

Location: Louisiana, United States

Posted: April 02, 2009 at 3:09 AM / IP Logged

Vehicle is '89 Honda Civic Hatchback. No rear wiper.

tedmond

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Joined: January 06, 2007

Location: Ontario, Canada

Posted: April 02, 2009 at 6:49 AM / IP Logged

" plan to use the Defrost button for the first (ACC) position, the cruise control "set" button and this relay setup for the second (IGN) position, and a Honda S2000 starter button in the original cylinder location for the third (START) position"

he is tapping into other electrical parts of the car to create a start sequence. if it was just switches then thats no biggie, but using cruise control to allow ignition power? if something happened to the ignition on the highway, then your in trouble. relays dont often fail, but if they did for somereason then problems arise.

howie ll

Pot Metal - Posts: 16,466

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Location: United Kingdom

Posted: April 02, 2009 at 6:54 AM / IP Logged

Sorry I just guessed at Civic but then I've done this whole post not reading it properly, what do you expect I'm going Cold Turkey on Cigs after 45 yrs! how do rear defrost buttons work? - Page 2 -- posted image.

how do rear defrost buttons work? - Page 2 -- posted image.

tedmond

Gold - Posts: 4,610

Joined: January 06, 2007

Location: Ontario, Canada

Posted: April 02, 2009 at 7:01 AM / IP Logged

ahah hey howie, should lay off the smokes.

correct me if im wrong. civics has a button to enable cruise control. That turns on the CC system, but the set button does not actually have continuity to the CC computer until its around 45km/h (about 25m/h) so if the car is sitting still, there is no voltage running through the SET button. so how do you plan on powering ignition. are you planning on just running a power wire through the set switch to a relay?

i am an idiot

Platinum - Posts: 13,673

Joined: September 21, 2006

Location: Louisiana, United States

Posted: April 02, 2009 at 8:25 PM / IP Logged

I am sure he plans on using only the switch and not the cruise control brain.

Hey Howie, I have faith in you and know you can do it. Don't let me down.

sofakingslow

Member - Posts: 15

Joined: December 15, 2005

Posted: April 02, 2009 at 11:27 PM / IP Logged

Tedmond - Exactly. The power steering controls are actually integrated into the steering wheel of the 89 Integra, which I have already put in my car.

Howie - I need to quit, too. Costs too much, in terms of money and quality of life. Funds could be better spent elsewhere. More money for toys!

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how do rear defrost buttons work?

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