low ampage to rear screen
Discussion
i have a 2005 BMW 330D and as the weather is getting worse i now have the need to use the heated rear screen which is really slow to clear (15minutes) the foils accross the screen are intact but is there anywhere else i should be looking to see where the drain in power is comming from. any help apreciated
cheers
cheers
doogz said:
HellDiver said:
The OP might not be written perfectly, but if you can't understand what he means, it's you that needs to check out that website.http://www.pistonheads.com/gassing/topic.asp?h=0&a...
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
doogz said:
HellDiver said:
The OP might not be written perfectly, but if you can't understand what he means, it's you that needs to check out that website.I don't understand what everyone's problem is with the OP.
OP, measure the resistance between the two terminals of the screen and Google/ask BMW/compare with another car if that is an expected result. You say the tracks are OK but is that from a visual check or measurement?
It's unlikely to be a problem with the feed to/from the screen.
OP, measure the resistance between the two terminals of the screen and Google/ask BMW/compare with another car if that is an expected result. You say the tracks are OK but is that from a visual check or measurement?
It's unlikely to be a problem with the feed to/from the screen.
Mars said:
I don't understand what everyone's problem is with the OP.
OP, measure the resistance between the two terminals of the screen and Google/ask BMW/compare with another car if that is an expected result. You say the tracks are OK but is that from a visual check or measurement?
It's unlikely to be a problem with the feed to/from the screen.
this is the problem:OP, measure the resistance between the two terminals of the screen and Google/ask BMW/compare with another car if that is an expected result. You say the tracks are OK but is that from a visual check or measurement?
It's unlikely to be a problem with the feed to/from the screen.
http://www.pistonheads.com/gassing/profile.asp?mem...
cmackay81 said:
Mars said:
I don't understand what everyone's problem is with the OP.
OP, measure the resistance between the two terminals of the screen and Google/ask BMW/compare with another car if that is an expected result. You say the tracks are OK but is that from a visual check or measurement?
It's unlikely to be a problem with the feed to/from the screen.
this is the problem:OP, measure the resistance between the two terminals of the screen and Google/ask BMW/compare with another car if that is an expected result. You say the tracks are OK but is that from a visual check or measurement?
It's unlikely to be a problem with the feed to/from the screen.
http://www.pistonheads.com/gassing/profile.asp?mem...
Do the resistance check as mentioned earlier.
Also check all the connections to the screen and point of supply for cleanliness & security.
If that fails to yield a result, check the voltage at the point of connection on the rear screen, and then at the point of protection ie. fuse carrier, if there is a noticeable difference between the two then you have a voltage drop somewhere between the two providing nothing else is connected in series between the two but I can't see it.
Regards,
Matthew
Also check all the connections to the screen and point of supply for cleanliness & security.
If that fails to yield a result, check the voltage at the point of connection on the rear screen, and then at the point of protection ie. fuse carrier, if there is a noticeable difference between the two then you have a voltage drop somewhere between the two providing nothing else is connected in series between the two but I can't see it.
Regards,
Matthew
Edited by Camaro91 on Wednesday 20th October 15:50
Could be purely down to the battery on the car getting a little weak, assuming it is still original, and therefore 5 years old.
Outside temps would have caused the glowplugs to be on for longer causing battery to 'drain' more and charging system not quick enough to regenerate the battery so rear screen heater was slow to clear, especailly if lots of other electrics were being used at the same time, lights, heated seats etc.
Probably worth getting the battery and charging system checked whilst under full load.
Outside temps would have caused the glowplugs to be on for longer causing battery to 'drain' more and charging system not quick enough to regenerate the battery so rear screen heater was slow to clear, especailly if lots of other electrics were being used at the same time, lights, heated seats etc.
Probably worth getting the battery and charging system checked whilst under full load.
Edited by E30M3SE on Wednesday 20th October 17:24
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