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Topic: Heated Screens (Read 886 times) |
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Glyn
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Now an OAP ! 95 cossie and another !and a 12v
Posts: 584
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Heated Screens
« on: Jan 31st, 2017, 5:55pm » |
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Both front and rear heated screens have suddenly stopped working, as have the heated mirrors. The switches light up when pressed and the fuses are intact, but no volts at the fuses.
Is there something that the two systems share that can have affected the front and the rear ?
Everything else appears to be ok 
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Tompion
Administrator
1997 2.3 Ultima estate.
Posts: 2932
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Re: Heated Screens
« Reply #1 on: Jan 31st, 2017, 8:00pm » |
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Check if there's power to the relays R4 & R18.
R5 is shown in the handbook as also rear screen but I think that's wrong it's for interior lights.
You could check R21 which controls ignition on electrics but I'd have thought you'd have other problems.
It could be a problem with cental timer but once again I'd expect other problems.
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ABS multiplug wheel sensor pins MK IV or MK 20
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a900one
Full Member
A scorpio is for life not just for christmas
Posts: 980
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Re: Heated Screens
« Reply #2 on: Jan 31st, 2017, 8:08pm » |
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Has the engine got to be running for the screens to work ?.
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Tompion
Administrator
1997 2.3 Ultima estate.
Posts: 2932
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Re: Heated Screens
« Reply #3 on: Jan 31st, 2017, 8:22pm » |
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The engine has to run for the front to work but the rear just needs the ignition on.
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ABS multiplug wheel sensor pins MK IV or MK 20
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Tompion
Administrator
1997 2.3 Ultima estate.
Posts: 2932
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Re: Heated Screens
« Reply #4 on: Jan 31st, 2017, 8:44pm » |
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You could try the central timer diagnostic.
The site gives a different method, but all I ever do is press & hold the rear screen button whilst I turn the ignition on (not start). When the button is released you should get a couple of bongs to show it's in diagnostic mode.
If you hold in either screen button you should get a continuous sound to show it's connecting through the timer. The same will happen if you open a door or the glovebox.
If you should just get a continuous sound as soon as you're in diagnostic mode check the glovebox switch to see if that's not turning off.
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ABS multiplug wheel sensor pins MK IV or MK 20
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Glyn
Full Member
Now an OAP ! 95 cossie and another !and a 12v
Posts: 584
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Re: Heated Screens
« Reply #5 on: Feb 1st, 2017, 12:16am » |
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Thanks for the replies.
I did check for power on R4 R5 and R18 and have 12v on two pins on each socket. The switches do time out as do the interior lights. The diagnostic mode checks out ok and the only other thing I can find is that the glovebox light does not come on-I will have to check that tomorrow.
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Glyn
Full Member
Now an OAP ! 95 cossie and another !and a 12v
Posts: 584
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Re: Heated Screens
« Reply #6 on: Feb 2nd, 2017, 3:34am » |
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Well, can't investigate further because the fault has corrected itself (unless I disturbed something)
Both screens heating normally (not been able to check the mirrors yet)
If it happens again I'll be back on here.
Thanks to all concerned
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pipino
Junior Member
DO IT RIGHT
 
Posts: 84
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Re: Heated Screens
« Reply #7 on: Feb 11th, 2017, 11:27pm » |
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When the windscreen is cracked does it stop the heated screen from heating up?
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pinotech
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Simmo
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I'm an OAP !
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Re: Heated Screens
« Reply #8 on: Feb 12th, 2017, 9:02am » |
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If the crack is deep enough to fracture the elements then I'm sure it would.
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Now I'm an OAP
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