 | Home > Puma (Tdci) > Front heated windscreen relay Puma MY12 where to find? |
 
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6482   
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 Click image to enlarge 1988 90 Td5 NAS soft top
2015 D90 XS SW |
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16th Feb 2020 4:27pm |
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| TopQ1967 Member Since: 14 Feb 2012 Location: Veghel Posts: 226  
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Thank you very much. Still no power at the switch but know where to look at now.
Regards Quirin |
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16th Feb 2020 5:32pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6482
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OK the switch is just used as a trigger for the timer. The lamp in the switch is in parallel with the output from the relay, so it only illuminates if the screens are switched on.
If no 12V supply on the white/green wire with the key in position 2 (ignition on) then check fuse 4, but this supplies other things like the instrument pack, headlamp relay and the relay which supplies the heated seats and electric windows (if fitted). Click image to enlarge Otherwise the main supply to the screen relay is Fuse 7 under the seat. 1988 90 Td5 NAS soft top
2015 D90 XS SW |
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16th Feb 2020 5:42pm |
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| Gillan Member Since: 01 Apr 2016 Location: Sheffield Posts: 35 
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Hi I thought the relay for the front screen was under the seat with the air con relays etc
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16th Feb 2020 7:24pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6482
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Not on the 2.2
 1988 90 Td5 NAS soft top
2015 D90 XS SW |
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16th Feb 2020 7:24pm |
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| Gillan Member Since: 01 Apr 2016 Location: Sheffield Posts: 35
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16th Feb 2020 7:41pm |
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| nick.bw Member Since: 26 Oct 2020 Location: Essex Posts: 56 
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@martin I am having a stinker trying to resolve my heated screen issue. 2.4 puma My switch doesnt show a light when pressed at all with the car running. With your comments above, am i right in thinking if i dont have any light in my switch, the light is powered from the heated screen relay and not the timer relay? So replacing that should be my first port of call? Thanks |
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14th Feb 2022 4:26pm |
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| Yannis Member Since: 02 Feb 2015 Location: Oxfordshire / Milan Posts: 402 
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My heated screen has stopped working.
When I press the heated screen button, the orange light only comes on for a second before switching off again. …. I answered my own question, seems engine has to be running for it to stay on. However my heated screen still doesn’t work. I have 12v to the purple cable on the left of the screen but no heat. So my guess is the screen is goosed. Maybe the big chip in the centre has something to do with it… |
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13th Dec 2022 11:44am |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6482
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The orange light is feedback from the heated screen relay (light is parallel to the screen as in my comment above), rather than an indication that the screen itself is working or not working.
So if the orange light comes on and goes straight off, the relay is working, and is being controlled by the timer. It's just being turned off again by the timer. This points at the timer, or the engine running signal wire. The engine must be running for the timer to start running, otherwise you get exactly the behaviour you've experienced - on for a second or two then off again. On a Puma this engine running signal comes from the instrument cluster. Main question before going any further... are you trying this with the engine running? 1988 90 Td5 NAS soft top
2015 D90 XS SW |
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13th Dec 2022 12:58pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6482
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OK you edited whilst I was typing
Do you test for 12V across the screen or use a different earth point? 1988 90 Td5 NAS soft top
2015 D90 XS SW |
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13th Dec 2022 12:59pm |
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| Yannis Member Since: 02 Feb 2015 Location: Oxfordshire / Milan Posts: 402
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My multimeter ran out of batteries as I was trying to test the screen.
So when Amazon brings me more batteries tomorrow I will try that. |
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13th Dec 2022 1:38pm |
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