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filter warning light
Posted: Mon Jul 06, 2009 8:29 pm
by ianminor
I have checked my filter warning circuit and it seems ok but the warning light fails to light when ign is switched on [bulb is ok]
Can the sender unit be replaced?
Posted: Mon Jul 06, 2009 8:34 pm
by rayofleamington
I've never tried to dig one out of the housing, but the bigger problem would be getting a new one to go back in.
My best guess would be to try and get a replacement filter housing. There should be some available from a scrap 1098...
I might even have one for you!
Posted: Mon Jul 06, 2009 9:23 pm
by Matt
Does your filter actually have the blockage sensor?
Posted: Mon Jul 06, 2009 9:44 pm
by bmcecosse
It's not supposed to light up when Ign on! It only lights up when the filter becomes blocked - and pressure rises across the filter! Test it by earthing the wire to the engine block - it's a normally open switch that closes on rising pressure. Opposite to the 'oil pressure' switch - which is normally closed - and opens on rising pressure.
Posted: Mon Jul 06, 2009 10:00 pm
by mike.perry
Only the later cars have filter warning lights and many of those have changed to cannister filters. The rest manage without one.
Best use for the light is to fit a towbar and use it for a trailer indicator warning light
Posted: Mon Jul 06, 2009 10:21 pm
by rayofleamington
It's not supposed to light up when Ign on!
He's right you know! Doh.
Filter light
Posted: Tue Jul 07, 2009 6:42 am
by Declan_Burns
I use that too but as a reversing light indicator. I have a write-up on how to do it if anybody wants it. I can't upload a pdf file here and don't know if it's possible.
http://www.morrisminoroc.co.uk/index.ph ... 45473_6259[/img]<br><br>
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Posted: Tue Jul 07, 2009 9:17 pm
by mike.perry
Good idea but if the reversing light is operated by the gear change then it doesn't need a warning light
Posted: Tue Jul 07, 2009 9:20 pm
by bmcecosse
Oh now where's the fun in that?! The whole idea was to make good use of the spare warning light! If you fit a Mini speedo - you get a green light to play with too !!
Filter light
Posted: Tue Jul 07, 2009 9:26 pm
by Declan_Burns
Mike,
The light on the speedo is parallel wired from the relay that switches the reversing light on. It's just an acknowledgement light indicating that the system is working and not as such a warning light.
Posted: Wed Jul 08, 2009 7:32 pm
by ianminor
well guys, thanks for all the replies. this forum is wonderfull, I got the answer to my problem and a wealth of other info too. It's just great!
Posted: Thu Jul 09, 2009 1:46 pm
by bmcecosse
We aim to please!