[rhudeboye]

<!--quoteo(post=71377:date=May 5 2009, 08:33 AM:name=rxter)-->QUOTE (rxter @ May 5 2009, 08:33 AM) <{POST_SNAPBACK}><!--quotec-->2) Anyone ever preempted mother nature and popped a mirror off? I want to get the pass side off and reglue it before it gets a mind of its own and breaks.<!--QuoteEnd--><!--QuoteEEnd-->

Not a bad idea.

As far as I know, my mirrors are orig. Sounds like its just a matter of time before they leave home and jump to their death. Actually, the way things normally work for me is shortly after reading a warning post the item fails. i.e. clutch hose.

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[gryphon]

I would try a tiny test spot near the edge of the mirror with contact cement to make sure that the solvent does not attack the coating on the back side of the mirror. I think, but am not certain now, that I might have once made this mistake with a motorcycle mirror and ruined it.

Tom

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[rxter]

<!--quoteo(post=71526:date=May 6 2009, 03:55 PM:name=gryphon)-->QUOTE (gryphon @ May 6 2009, 03:55 PM) <{POST_SNAPBACK}><!--quotec-->I would try a tiny test spot near the edge of the mirror with contact cement to make sure that the solvent does not attack the coating on the back side of the mirror. I think, but am not certain now, that I might have once made this mistake with a motorcycle mirror and ruined it.

Tom<!--QuoteEnd--><!--QuoteEEnd-->

Excellent point. Same for epoxy. The 2S tape is sounding better all the time [img]style_emoticons/<#EMO_DIR#>/wink.gif[/img]

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[Ryan]

The mirrors are heated. If the mirror is held off the mounting surface by foam tape, won't this inhibit the warming of the glass? Just a thought.

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[Jamie '92 968]

<!--quoteo(post=71556:date=May 7 2009, 10:45 AM:name=Ryan)-->QUOTE (Ryan @ May 7 2009, 10:45 AM) <{POST_SNAPBACK}><!--quotec-->The mirrors are heated. If the mirror is held off the mounting surface by foam tape, won't this inhibit the warming of the glass? Just a thought.<!--QuoteEnd--><!--QuoteEEnd-->


Good point.
I use my heated mirrors so infrequently, I can't say for sure whether it is a problem or not, though I don't think so.
In other words, I can't give a before and after assessment of heater effectiveness, but the heat does still work adequately.
The tape I used was pretty thin.

Jamie

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[rickh]

<!--quoteo(post=71571:date=May 7 2009, 10:32 AM:name=Jamie '92 968)-->QUOTE (Jamie '92 968 @ May 7 2009, 10:32 AM) <{POST_SNAPBACK}><!--quotec-->Good point.
I use my heated mirrors so infrequently...

Jamie<!--QuoteEnd--><!--QuoteEEnd-->

Stupid question, but there isn't an "on/off" switch for this, right? It's just always on..

Rick

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[Jamie '92 968]

<!--quoteo(post=71577:date=May 7 2009, 02:08 PM:name=Rick H)-->QUOTE (Rick H @ May 7 2009, 02:08 PM) <{POST_SNAPBACK}><!--quotec-->Stupid question, but there isn't an "on/off" switch for this, right? It's just always on..

Rick<!--QuoteEnd--><!--QuoteEEnd-->

I thought it was controlled with the rear defrost switch, but now I'm not sure. [img]style_emoticons/<#EMO_DIR#>/blink.gif[/img]

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[rickh]

<!--quoteo(post=71584:date=May 7 2009, 12:36 PM:name=Jamie '92 968)-->QUOTE (Jamie '92 968 @ May 7 2009, 12:36 PM) <{POST_SNAPBACK}><!--quotec-->I thought it was controlled with the rear defrost switch, but now I'm not sure. [img]style_emoticons/<#EMO_DIR#>/blink.gif[/img]<!--QuoteEnd--><!--QuoteEEnd-->

The cab has no such switch... anyone else?

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[rhudeboye]

I believe it works in conjunction with the defrost switch. I've always assumed thats how they all worked.

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[Anchorman]

For the...hardtop? hatchback? GT? whatever, it's controlled with the rear defroster. For the cab, the mirror heaters are always on.

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[gryphon]

<!--quoteo(post=71618:date=May 7 2009, 08:24 PM:name=Anchorman)-->QUOTE (Anchorman @ May 7 2009, 08:24 PM) <{POST_SNAPBACK}><!--quotec-->For the...hardtop? hatchback? GT? whatever, it's controlled with the rear defroster. For the cab, the mirror heaters are always on.<!--QuoteEnd--><!--QuoteEEnd-->

How handy for living in Arizona with a cab. [img]style_emoticons/<#EMO_DIR#>/sad.gif[/img]

Tom

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[Jamie '92 968]

Since the heaters on the cab are always on, it would be interesting to know if the mirror failuresare more common on th cab than the coupe.
Don't know if it is would actually be useful to know this ... but it would be interesting.

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[rxter]

Would also be interesting to know how to turn the heaters off (without having to take Rick's approach).

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[flash]

i don't think they're electric - i think they get a bit of air from the tube going into the door - i sure didn't see any element in there when i took it apart

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[968Syncro]

Mine had 2 wires attached, seen in this picture: http://www.968forums.com/index.php?s=&...ost&p=58221
But I have no idea if they get warm or anything else (haven't driven it in snow or rain or condensation).

Roland

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[flash]

hmmm - i was going by memory, and didn't remember that (not inclined to rip it apart to find out either - way too much fun the first time) - maybe there is something in there then - interesting - thanks

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[rxter]

Referring to Rick's post #19 - he unplugged it. Cab.

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[Jamie '92 968]

Just for fun, I looked at the '92 wiring diagram to see if I could learn anything. It shows the mirrors having 2 motors and a "rectangle" which could be the heating element. Refer to zone C31 for the passenger''s side mirrir and zone C37 for the Driver's side. This is on Sheet 4.
I'm assuming that this may be the heating element because if you trace back the wire connection to zone D38, there is a flag that leads you to the corresponding flag at zone E25 on Sheet 3. The wire from this flag appears to connect to both the rear window defogger heating element and a relay? labeled Rear Window Defogger.

I don't have the diagram for the Cab handy.

I don't think this helps the discussion, but it was fun. [img]style_emoticons/<#EMO_DIR#>/rolleyes.gif[/img] Can anyone confirm my interpretation, and/or trace a similar path for the Cab version which might help the discussion?

Jamie

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[rxter]

Did the repair today. No sweat. Just used 5 minute epoxy. If you do this make sure you put on a pair of clean gloves before you place the mirror. I got a little of the epoxy on my fingers then got it on the mirror face and the surround. Interestingly, I was able to wipe it off with the sovent that came with the Dr. Colorchip kit, but it would have been better to avoid it altogether. No ill effects to the mirror backing yet (30 minutes). On my mirror the backing appeared to be coated, maybe with a clear plastic or glass? Not sure, but it did not have that hazed silver look that a wall mirror has. Porsche probably needed to do that to protect it from the heat. I calculated the hours. 93,000 miles, at an average of 25 mph = 3720 hours, or 223,000 minutes of heat on the mirror. No wonder the glue gives up.

Regarding the heating element, it comes on with the ignition in the Cab, rear defrost in the coupe. In the cab it is controlled by fuse #13. Pulled the fuse and no more heat.

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