Relays- Help needed
Discussion
[pic]http://www.vehicle-wiring-products.co.uk/VWPweb2000/relays/Images/GroupImage1.GIF[/pic]
The context is adding a heated windscreen, where none was previously.
If this is the relay to go for, then connector...
30- Positive from the ignition circuit via a switch
85- positive from the battery, via a 20 amp fuse.
86- positive leading to the screen, via a 10 minute timer.
87- Negative from Earth.
Is this right?
And what sort of switch should I go for, bearing in mind there is a timer in the circuit.
A toggle (won't this look on ,after the timer has cut the power?)
A "only on when pushed" (like a starter button)
Or, best, one with a light that comes on when the screen powered (and if so, how the hell does that fit into the wiring?).
If you have any switch suggestions, there are loads [url]here|http://www.vehicle-wiring-products.co.uk/VWPweb2000/switch-1/switch-1.html[/url]
Please help, I am getting more confused, the more I think about it!
The context is adding a heated windscreen, where none was previously.
If this is the relay to go for, then connector...
30- Positive from the ignition circuit via a switch
85- positive from the battery, via a 20 amp fuse.
86- positive leading to the screen, via a 10 minute timer.
87- Negative from Earth.
Is this right?
And what sort of switch should I go for, bearing in mind there is a timer in the circuit.
A toggle (won't this look on ,after the timer has cut the power?)
A "only on when pushed" (like a starter button)
Or, best, one with a light that comes on when the screen powered (and if so, how the hell does that fit into the wiring?).
If you have any switch suggestions, there are loads [url]here|http://www.vehicle-wiring-products.co.uk/VWPweb2000/switch-1/switch-1.html[/url]
Please help, I am getting more confused, the more I think about it!
hmm, would it not be better to put the timer on the switch circuit, i.e. cut the power to the relay after 10mins, that way you could have any switch you wanted.
If you go with a push-to-make (starter button type) then you can't switch the heater off manually, if you go with a toggle you'll have to remember to flick the switch back off, but you can override the 10minute timer.
Why put a timer on at all though, I appreciate you don't want your window been heated permentally but you could just switch it off after it's demisted.
If you go with a push-to-make (starter button type) then you can't switch the heater off manually, if you go with a toggle you'll have to remember to flick the switch back off, but you can override the 10minute timer.
Why put a timer on at all though, I appreciate you don't want your window been heated permentally but you could just switch it off after it's demisted.
SOME progress on this subject. I now understand the first relay- I'm learning.
I have now purchased an alledged timer relay for a mondeo front heated windscreen. this one has a pretty picture on it, what does this lot mean?? i am assuming there is an illuminated switch in there somewhere?
it is a bit fuzzy, there is numbers 1-5 to decide where
1 is far right#
2 is far left on same circuit as #1
3 is top middle
4 middle
5 bottom
I have got a dealer mondeo electrical diagram which is a little help but i cant translate it into english (i.e wires and stuff that i would put on another car)
Thanks for the help guys, i just cant get my head around this.
I have now purchased an alledged timer relay for a mondeo front heated windscreen. this one has a pretty picture on it, what does this lot mean?? i am assuming there is an illuminated switch in there somewhere?
it is a bit fuzzy, there is numbers 1-5 to decide where
1 is far right#
2 is far left on same circuit as #1
3 is top middle
4 middle
5 bottom
I have got a dealer mondeo electrical diagram which is a little help but i cant translate it into english (i.e wires and stuff that i would put on another car)
Thanks for the help guys, i just cant get my head around this.
Hmm, your relay
doesn't look like it corresponds completely with the one in the diagram...
I'd initially be thinking of doing something like this:
but I wouldn't claim that is definitely the correct solution...
Connections 1 and 2 on the timer relay might be polarity sensitive, due to having an electronic bit connected to them for the timing function, but there's nothing on your relay to indicate which way round they are, so the polarity I have indicated for them on my diagram is just a guess.
Your diagram seems to indicate an internal connection within the relay which your relay itself doesn't indicate; I've followed your relay.
It has to be said that before I did anything I'd take your relay apart in order to ascertain the polarity of 1 and 2, see whether there are any internal connections not indicated on the outside, and check for any other weird stuff.
Your diagram also shows a switch with both an instrument-lighting light and an on light; I've just drawn an on light.
The inverted Lego Christmas tree symbol is an earth
Edited for formatting
>> Edited by Pigeon on Monday 24th October 22:59
doesn't look like it corresponds completely with the one in the diagram...
I'd initially be thinking of doing something like this:
but I wouldn't claim that is definitely the correct solution...
Connections 1 and 2 on the timer relay might be polarity sensitive, due to having an electronic bit connected to them for the timing function, but there's nothing on your relay to indicate which way round they are, so the polarity I have indicated for them on my diagram is just a guess.
Your diagram seems to indicate an internal connection within the relay which your relay itself doesn't indicate; I've followed your relay.
It has to be said that before I did anything I'd take your relay apart in order to ascertain the polarity of 1 and 2, see whether there are any internal connections not indicated on the outside, and check for any other weird stuff.
Your diagram also shows a switch with both an instrument-lighting light and an on light; I've just drawn an on light.
The inverted Lego Christmas tree symbol is an earth
Edited for formatting
>> Edited by Pigeon on Monday 24th October 22:59
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