hi all , new owner of a 06 and loving it , till today when spoiler went up but not down , nothing from switch , i can lower it by hand and it lifts again at right speed but won't lower , even replaced battery but still nothing.

 

either the limit switch assembly in the spoiler, or a bad dash spoiler switch.
( of course, can always be mice chewing the wiring )

question : how do you lower it by hand ?

 

thanks, fingers crossed its one of the two and not the mice,just took boot cover of and used a a small key and fingers to lower it, 3 times with same result ,just popped back up haha.

 

Of COURSE it popped back up - the BCM had commanded it to go up (for what every reason) and the limit switches told the BCM it was down - so the BCM put it back up.

The question here is, WHY does the BCM want it up all the time? Take the cover off the module box and inspect for chewed wiring in there (the big box next to the battery). THEN, lift up the mat in the trunk and look for water sitting under there. If both of these show no issues, I'd first guess flaky battery but you have eliminated that.

So, grap the service manual and a voltmeter and check for what voltages you have at the connector pins on the BCM that come from the dash switch - could be, as indicated before, a bad switch TELLING the BCM to raise it (but in 6 years with these cars, I've never seen that.)

 

What "if".. the raised limit switch was bad.. and never sent the "signal" it was raised.. would it lower by speed or switch? Kick it up past 85mph and see if it beeps at you.. "warning spoiler not deployed"..

 

Stop adding Viagra to the Fuel Tank................a spoiler erection lasting more than 4 hours? You need to consult the doctor.

 

When I read the symptoms I see conflicting reports. Obviously the spoiler is not lowered by hand at speed so it is popping up again while stationary. While in the the first post it pops up at speed but does not go down.
When does it ever go down?

I cannot see moisture in the trunk causing these problems.
Try this thread.

 

haha , it pops up at speed and lowerd by hand on the drive . no water in trunk and no chewed bcm wires so next will get up to 85 and see if we get the alarm,did this on sunday after i disconecting the spoiler motor and did get the alarm so connected it up again but left it at that,also would like to say this forum is ace.

 

Have you had the codes read? The CE light may not be on, but check for them anyway.

 

yep, no codes at all .

 

ok, on my way to work and took it up to 95 and no alarm,(what a nice way to go to work haha), next stop auto electric guy next week, cant not have the car over the wkend.

 

If the spoiler was up, then you would hear no alarm.

 

It was a test to see if the car "knew" the spoiler was up.. or failed to acknowledge this and resulting in not lowering it as it should.

 

Right getting somewhere now , central control unit ( motion sensor ) fuse dead , put in a new 5 A fuse and it blew again so used a 10 A and spoiler working , only problems now are is it ok to run this on a 10 A fuse ? And I bust the lower limit switch so when I put it down it pops back up , but a least I know what the problem is , fingers crossed

 

Have just hot glued the lower limit switch back in and it's all working fine and dandy, but still a bit concerned about using a 10A fuse instead of a 5A ,any ideas on the would be much appreciated .

 

It's never a good ideal to double the manufacturer's specifications. Maybe try a 7.5 amp fuse, and if it blows that ,you have short somewhere. I'm a little confused, which fuse is it your replacing.

 

Hi Steve , it's fuse no7 central control unit ( motion sensor ) it's the one that also locks the doors when you reach 9 mph

 

Number 7 : Electronic transmission control (park/reversing lock) ,Photo chromatic rearview mirror and BCM (body control module). It seems like a short but it could be ,something is straining to work properly. Try lubricating the spoiler and the door locking mechanism. I say this because, if the 10 amp fuse is working, "something" is demanding more amperage.

 

Thanks , will do, it only blew when I lowererd the spoiler so you might have hit the nail on the head.

 

have now lubricated spoiler and locks and all is working well with the right size fuse, the only thing i am now wondering about is that when i turn the car on the light on the spoiler switch comes on for about 3 seconds then off with no other issues , is this normal? . Also am going to reseal the oil breathers next week and am wondering if anybody knows whats the best replacement for the alloy screws, and could i use off the shelf steel ones ?