Heated screen wiring?

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MexibugNeil
Posts: 1
Joined: Mon Feb 21, 2011 9:43 pm

Heated screen wiring?

#1 Post by MexibugNeil » Fri Mar 04, 2011 11:45 am

Hello,

I am about to fit heated front and rear screens to my VW, I have bought the fitting kits and they will work but they are switched to be either off or on.

What I want is a to wire them up so they will go off automatically after a certain amount of time and I want to be able to switch them off manually if needed before this time is up.

I'm not sure what I need, obviouly a momentary switch and some type of relay. Its for a 12v car.

Anyone got any good wiring diagram or any links to what I need?

Thanks in advance.

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TerryG
Posts: 6754
Joined: Wed Jan 05, 2011 1:54 pm
Location: East Midlands

Re: Heated screen wiring?

#2 Post by TerryG » Fri Mar 04, 2011 4:53 pm

You need a handy timer relay: http://www.maplin.co.uk/universal-timer-kit-3315
That one has nowhere near the required current capasity but you could use it to trip a more beefy relay.
It has been quite a few years since i designed myself a timer circuit (for the SRS light in my modern) but there are lots of users on here that are handy with electronics that can probably advise you on a DIY solution.
Understeer: when you hit the wall with the front of the car.
Oversteer: when you hit the wall with the back of the car.
Horsepower: how fast you hit the wall.
Torque: how far you take the wall with you.

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