Sunblind Issues

trebor · 1st June 2010, 18:29

A number of members have had problems with sunblinds not working or working off and on, so just wanted to start a dicsussion thread of any interested parties.

The advice is sometimes to give the motor a tap which seems to spring it into life, but not always and if you have seen the excellent how to by curriemart ( link below ) this could even be the cause of the broken magnets inside the motor casing.

http://www.the75andztclub.co.uk/foru...ad.php?t=54584

I have just read on Rave that the sunblind switch has a low voltage disable circuit which isolates the controller circuit and prevents sunblind operation if the battery voltage decreases to 11.8 volts or below, so could this be another reason why some dont work, through not having a fully functional battery which as we know can cause other problems on the car

I know not everyone has a sunblind but it is a desirable mod and they can only get more expensive, so if we can get to the bottom of the causes we may be onto a winner for the future and keep repair costs down

Departed · 1st June 2010, 19:00

Not sure Rob.

On Pauls car, the switch seemed to be providing power, but the motor didn't operate. After I applied a voltage directly to the motor it seemed to work better. I wonder if the commutators are oxidising a bit if they aren't used for a while. Shouldn't happen but I don't completely trust the people who make the motors after one of their technical guys tried to BS me. The tapping cure might also overcome this.

I think it might be worth making a lead to be able to apply 15 direct to the motor on any that appear faulty, to see if they magically come to life. This could be done at the switch end by unplugging the proper switch.

Going on the thickness of the steel casing of the motors youd need quite a whack to crack those ceramic magnets. I'd say it's more likely been dropped on the stripped one in the pictures, but anythings possible. Note, I'm only making an observation here, not accusing anyone of anything in case anyone thinks that!

Bernard LPG · 1st June 2010, 20:38

Not having had the need to operate ours for a couple of years.... you've guessed it, while we were on holiday in Spain it would not raise.
A bit of poking around at the blind while operating the switch at the same time with the engine at fast tickover and it sprang to life. So sounds likely that the motors stick.
OK each time since.

Thomas · 1st June 2010, 20:40

I put mine up and down at least once a week just to keep everything moving and have never had any problems (touch wood!)

Raistlin · 1st June 2010, 20:51

It;ll be interesting to see what is up with mine.

I run it at least twice a month to insure against siezure but it has still stopped working

1st June 2010, 18:29	#1
trebor This is my second home Rover 75 CDTi Connoisseur SE & MG ZT Saloon 190 Join Date: Jun 2007 Location: Coven Posts: 12,523 Thanks: 526 Thanked 1,877 Times in 885 Posts	Sunblind Issues A number of members have had problems with sunblinds not working or working off and on, so just wanted to start a dicsussion thread of any interested parties. The advice is sometimes to give the motor a tap which seems to spring it into life, but not always and if you have seen the excellent how to by curriemart ( link below ) this could even be the cause of the broken magnets inside the motor casing. http://www.the75andztclub.co.uk/foru...ad.php?t=54584 I have just read on Rave that the sunblind switch has a low voltage disable circuit which isolates the controller circuit and prevents sunblind operation if the battery voltage decreases to 11.8 volts or below, so could this be another reason why some dont work, through not having a fully functional battery which as we know can cause other problems on the car I know not everyone has a sunblind but it is a desirable mod and they can only get more expensive, so if we can get to the bottom of the causes we may be onto a winner for the future and keep repair costs down __________________ www.midlandsnanomeets.co.uk Robs Car Gallery Coven near Wolverhampton WV9 2000 Cowley Built Rover 75 2.0 V6 Club SE/ Atlantic Blue/ Sandstone/Walnut (daily driver) 2003 Land Rover Freelander 1 TD4 HSE Helsinki Blue/Black Leather (swmbo daily driver) Last edited by trebor; 1st June 2010 at 23:16..

1st June 2010, 19:00	#2
Departed Retired -- Join Date: Jan 2007 Location: -- Posts: 3,785 Thanks: 0 Thanked 4 Times in 4 Posts	Not sure Rob. On Pauls car, the switch seemed to be providing power, but the motor didn't operate. After I applied a voltage directly to the motor it seemed to work better. I wonder if the commutators are oxidising a bit if they aren't used for a while. Shouldn't happen but I don't completely trust the people who make the motors after one of their technical guys tried to BS me. The tapping cure might also overcome this. I think it might be worth making a lead to be able to apply 15 direct to the motor on any that appear faulty, to see if they magically come to life. This could be done at the switch end by unplugging the proper switch. Going on the thickness of the steel casing of the motors youd need quite a whack to crack those ceramic magnets. I'd say it's more likely been dropped on the stripped one in the pictures, but anythings possible. Note, I'm only making an observation here, not accusing anyone of anything in case anyone thinks that!

1st June 2010, 20:38	#3
Bernard LPG I really should get out more....... 75 V6 Saloon 2003 LPG MGZT V8 260 LPG Join Date: Dec 2006 Location: Evesham Posts: 2,134 Thanks: 0 Thanked 1 Time in 1 Post	Not having had the need to operate ours for a couple of years.... you've guessed it, while we were on holiday in Spain it would not raise. A bit of poking around at the blind while operating the switch at the same time with the engine at fast tickover and it sprang to life. So sounds likely that the motors stick. OK each time since.

1st June 2010, 20:40	#4
Thomas This is my second home MG6 1.8T GT SE Join Date: Mar 2009 Location: Falkirk Posts: 9,510 Thanks: 106 Thanked 173 Times in 128 Posts	I put mine up and down at least once a week just to keep everything moving and have never had any problems (touch wood!)

1st June 2010, 20:51	#5
Raistlin Banned 75 CDT Connoisseur SE Auto Join Date: Nov 2006 Location: Wolverhampton Posts: 8,450 Thanks: 0 Thanked 3 Times in 3 Posts	It;ll be interesting to see what is up with mine. I run it at least twice a month to insure against siezure but it has still stopped working