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Sunload Sensor

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Old Jun 29th, 2020, 17:37   #1
baminter
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Default Sunload Sensor

I have an 1996 960 wagon and while I was installing some new dash speakers the sunload sensor that goes in the passenger side speaker grill disintegrated in my hand while trying to reinstall it and now my A/C won't come on. Does anyone know of a way to bypass this sensor?
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Old Jun 29th, 2020, 19:31   #2
Paul Wildsmith
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it can only be a photosensitive resistance. I'd start by just connecting the wires together - assuming close to zero resistance in sunlight. Might be worth a look at the wiring diagram, but I expect it'll just show the wires going into a 'black box'.
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Old Jun 29th, 2020, 20:36   #3
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I've looked at the wiring diagram and that's pretty much what I found. Thanks for replying!
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Old Jun 30th, 2020, 00:18   #4
Laird Scooby
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It's a photodiode! Don't just link the wires together, you could damage something in the ECC box!

Also how much of it crumbled? Is the actual component intact and the moulding around it has crumbled?
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Old Jun 30th, 2020, 12:21   #5
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maybe, I assumed it was a LDR. But I don't know. Not sure that it would inhibit the aircon from working at all either way.
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Old Jun 30th, 2020, 12:26   #6
Laird Scooby
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Quote:
Originally Posted by Paul Wildsmith View Post
maybe, I assumed it was a LDR. But I don't know. Not sure that it would inhibit the aircon from working at all either way.
It doesn't, it's a sunlight detector so it senses the sunlight and if the car has been parked in the sun for a while, it forces the air con into fast cooling mode when the car is restarted or prolongs it if it's already selected manually.

It's possible some were LDRs but the ones i've known have been photodiodes.
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