Hi there, did anyone ever open up the motor housing of a side mirror?
Mine stopped working on the left side, and I have checked the TS list in the supplementary FSM.
I came to the point where it says; change out motor assembly of the mirror.
Well, I guess if that one is broken, I could just as well open it up to see what´s in there.
Two motors with gears, and each motor has its capacitor/resistor of some kind, rated at 10K, I guess ohms and 100 volt.
Now when I apply direct battery power to either of them, they work... hmmm.
Something I missed, or?
Logic tells me now, there must be an open somewhere, I didn´t find it though.
If it isn´t an open somewhere, then it must be one of those caps/rests.
Funny only that both up/down and side movement stopped.
That would mean both caps/rests went out at the same time.

Thank you very much if someone can shed some light on this one.
I posted on another forum as well, but never got a response.

BTW, it´s a 91, and both left and right mirror heaters work.

have you verified that the switch itself is working?

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Sorry for the late response, having some problems with receiving mails, so I don´t see any responses to my post.

Yes, it´s working, at least the right side.
I went through the TS chart in the FSM.
But I´ve been thinking if I might have checked it incorrectly.
One of the last checks in the chart said I should check if testlight lights up when testing one or two circuits (don´t recall wich), but I checked from the switch, I might have checked it from the wires coming out from the mirror assembly.

Problem is that you cannot see wich wire is what, since they are all black as far as I can see.

I´ll just have to identify each wire first and go from there.

Weather isn´t that good here now, so I´ll try later on in the week or weekend.

if you need a new mirror, contact vette2vette.com.

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Thanks, but the mirror itself is OK, the housing, the glass, the trunion wich holds the glass, even the mirror assembly with the motors in it work as I tested them with battery power.
As I mentioned before, I think I might have tested at the switch instead of at the motor assembly connector.

Well guys, I found the problem and it wasn´t in the book.
At least not where I would expect it.
And that is in the electrical supplement that came with the big book.

Here goes, I tested again following the chart in the second FSM.
Chart 2, disconnect conn. at mirror assembly, then you should connect a test light to ground and terminal B, then A and C together and so on.
The thing is, the wires at the conn. at the mirror assembly (6) are all black...
So, now I tested for resistance between the colored wires (at the switch, purple/white, light green and white IIRC) that are pointed out in the chart and any of the black wires at the mirror assembly conn.
Two out of three at the connector showed resistance when connected with the wires at the switch.
Purple/white was one of them, followed the purple/white wire and came to what probably is a junction where wires go to the right side mirror.
Disconnected it and voila, found it to be corroded in there, cleaned up sprayed all connectors in that door with some spray for electric parts and connectors (I´m here in Europe, they probably don´t sell the same brand in the US and I got it cheap a few years ago).

And both my right and left mirrors are working again.

Copied from my reply at another forum.

By the way I got my rear defogger fixed as well, it wasn´t working either and turned out to be the left (ground) wire had lost it´s connecton somehow.

Glad you found it and thanks for the update!