Headlight wiper interval control unit replacement

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schnaarf
E30 Zone Camper
E30 Zone Camper
Posts: 1076
Joined: Sun Jun 24, 2007 11:00 pm

Post Mon Oct 30, 2017 6:26 am

Hi all,

Mine has water damage so before I go about replacing the internals, is there something similar which would do the same job?

They're also ceased so sorting that will be fun

Cheers
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Brianmoooore
E30 Zone Team Member
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Posts: 49359
Joined: Mon Jan 10, 2005 11:00 pm

Post Mon Oct 30, 2017 9:49 am

The module is an AND gate, followed by a crude counter with a non volatile memory. When the counter reaches five or six, it produces a 12 volt + pulse of half a second or so, on the black/yellow wire, and resets.
I know of no other module that can replace it, but they are usually reliable, so a second hand unit should be OK as a replacement. As long as it's mounted properly, on the side of the washer bottle, and not laid flat on the chassis leg, it should last forever.
An alternative is to convert to manual operation with a push to make switch.
schnaarf
E30 Zone Camper
E30 Zone Camper
Posts: 1076
Joined: Sun Jun 24, 2007 11:00 pm

Post Mon Oct 30, 2017 10:03 am

Thanks Brian.

It had broken off the washer bottle and was upside down - has a bit of water damage at the end.

I'll give it a clean up. How I can test it?