Heater Front Screen for Mk2 Clio????

[Space Cadet]

Yeah the cars UCH will control the switching of the relay. I've wired the whole car from scratch

James, have you made your own relay board then, or bought one off the shelf, or just modified the OEM board?​

 

[Adam.]

I'm considering wiring 1 timed relay up to the 2 normal relays. So switch>timed relay>2 normal relays>window. Dunno why I want to do it like that, probably just more to go wrong over buy 2 timed relays but hey, its good to be different/retarded.

Everything is there for your screen. You just need to earth it and tap into a live...........

 

[Djw John]

Ah fair enough, been too busy stripping the ph1 barely looked at the 182! Saves some work then. Is it just normal relays or timed ones?

 

[Adam.]

It's just normal, not timed, the switch should be there too.

You really don't need to use it as much as you think. A quick 2 minute blast is usually enough. I done Ayr > Fife in the pissing rain and only used it a couple of times and that was with no heater!

I've got pictures of what wires to splice it in to.

 

[BIGASH]

James, have you made your own relay board then, or bought one off the shelf, or just modified the OEM board?​

I ended up using a modular relay board which has worked really well
http://www.polevolt.co.uk/acatalog/Modular_Fuse_and_Relay_System.html

 

[Space Cadet]

I ended up using a modular relay board which has worked really well
http://www.polevolt.co.uk/acatalog/Modular_Fuse_and_Relay_System.html

Thanks James, good site!! - think a couple of 'Standard relay base with fixing hole & terms' will do for me.

 

[Space Cadet]

Sod's law as soon as I get around to finally wiring up the heated windscreen the weather improves and I'm not actually going to be able to see if its working. This got be thinking if there was a way of telling if it was on or not (on the basis that its wired ok).

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I cant remember how the Clio's heated rear screen worked but I'm sure in our Scirocco the light in the button stays on for the time that the relay is sending a live to the rear screen.

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Would it be as simple as interrupting the lives from the two relays to the two elements with a couple of LEDs or similar, presumably these would have to handle 25A though??

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James, I'm beginning to see why you simply just fitted an on/off switch!!
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[BIGASH]

Your best bet would be to use a switch with an indicator light and then you just take a feed from the pin on the relay when active to the light

 

[Space Cadet]

Thanks James - I like that idea! Although wouldn't the switch be getting the full 25A from the relay pin when active? Now that I've bought these timed relays I might as well make the most of them and would need a momentary switch, which I have, but with a light in the middle.

 

[Space Cadet]

Right, I've figured it all out...... It is possible to buy illuminated momentary switches where the LED feed is independent of the switch itself, but I've already bought my non-illuminated momentary switch and have therefore bought two 12V LEDs and their little holders and will run these from the Relay pins that power the screen elements.

That way they will only be on when the Relay is actually powering the screen and I will position them right and left of each other relative to the right and left screen elements. Bonza!

 

[Space Cadet]

Well I finally got around to wiring up the windscreen circuits, was a fairly easy but fiddly job to do.

Went to try it out for the first time and sod's law it didn't work!! - there was no voltage coming from the two timed relay live pins when supposedly switched on using the momentary switch.

I pulled my hair out going through all the connections and making sure everything was as it should be...... until I tried it with a couple of old relays and it worked perfectly!!??

So possibly the timed relays are duds!?

Anyway I've fitted an on/off switch and a couple of 12V LEDs (one for each circuit to show that the relays are working) from the relay live pins so can just turn the window on and off when needed.

Bonza and am really chuffed its all working. Just my luck though the weather has improved and I'm not likely going to be able to test it out for proper for some time.
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