Rear heated screen

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Stevecoulsin
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Rear heated screen

Post by Stevecoulsin » Mon Oct 28, 2019 6:11 pm

Odd question. But how does the power get to the rear heated screen? I have two earth wires going from the screen to each of the gas struts but no obvious power lead.


Steve Coulson, MB66, previously 1973 SE5a & 1976 SE6a

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Rear heated screen

Post by philhoward » Mon Oct 28, 2019 6:18 pm

One side is power, the other one the earth as the struts are electrically isolated by the end fittings which are plastic IIRC. I’m assuming this a 6 series as the wires go alongside the hinges on a 5/a?


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Roger Pennington
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Rear heated screen

Post by Roger Pennington » Mon Oct 28, 2019 6:19 pm

Have you tested the wires? I think (speaking from memory) that one is power (probably the l/H?)


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Stevecoulsin
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Rear heated screen

Post by Stevecoulsin » Mon Oct 28, 2019 6:51 pm

Thanks. It makes sense that one should be power. Just seemed odd to be coming from the strut. I checked with a meter quickly a couple of days ago but no voltage detected. Will have a better try now I know the basic wiring is correct.


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Roger Pennington
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Rear heated screen

Post by Roger Pennington » Mon Oct 28, 2019 7:22 pm

Where did you perform the test? The reason I ask is that there isn't a continuous wire from the ends of the heater element, the struts are actually part of the wire. :shock: So you need to start by checking that current is arriving at the bottom of the strut.


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Stevecoulsin
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Rear heated screen

Post by Stevecoulsin » Sat Nov 02, 2019 5:47 pm

Thanks to answers and helping rule out wiring.
Replaced both wires to the rear screen which were not original and past their best Finally traced the problem to failed relay.
Steve


Steve Coulson, MB66, previously 1973 SE5a & 1976 SE6a

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