Ok, here´s one...
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Ok, here´s one... FIXED
1991 vette, left outside mirror stopped working.
**** in the door is ok, since I have been through the whole ts list in the 2nd book (FSM).
Funny thing is, that when I apply batt. power directly to the motors (there are two in the small black box together with two capacitors or whatever), the motors actually work, switch plus to minus and v.v. they turn the other way... as they should.
The both capacitors (?) at each motor are, if IIRC, 10K ohm.
My know how in electronics stops at "battery should be 12 volts minimum... and circuits must be closed if to make something happen".
Anyone out there who can explain why the mirror doesn´t work with the ****, but does when I apply power to the motors directly...
Again, I´ve been through the whole troubleshooting procedure in the second book of the FSM.
**** in the door is ok, since I have been through the whole ts list in the 2nd book (FSM).
Funny thing is, that when I apply batt. power directly to the motors (there are two in the small black box together with two capacitors or whatever), the motors actually work, switch plus to minus and v.v. they turn the other way... as they should.
The both capacitors (?) at each motor are, if IIRC, 10K ohm.
My know how in electronics stops at "battery should be 12 volts minimum... and circuits must be closed if to make something happen".
Anyone out there who can explain why the mirror doesn´t work with the ****, but does when I apply power to the motors directly...
Again, I´ve been through the whole troubleshooting procedure in the second book of the FSM.
Last edited by vette079; Jul 5, 2011 at 04:15 AM.
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You would guess it´s the **** or the printed board in there, but following the TS chart for the affected part would show if it´s the **** or the wiring or the mirror motor.
But the actual motors in the assembly work, since I took it apart and put direct batt. power on ´em.
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Joined: Aug 2009
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From: Denver CO
My guess would just be an electrical gremlin somewhere. For instance, I replaced the electric radiator fan in my '85 recently, and when all was finished and wired up, my previously non-working power mirrors and cruise control started working!
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The weather is far from perfect (no garage here), so I´ll wait for the weather to get better, and then go through the whole ts chart once again.
It´s not impossible I checked something the wrong way, I remember checking at the ****, but now that I think of it, I should have checked in the other end of the harness (where it goes into the mirror).
I think I´ve missed the bit of harness between the **** and the mirror.
It´s just that you don´t see what color the different wires have that go into the mirror assembly.
Guess I´ll have to identify each wire with a test light or something first.
Thanks for the responses this far, I´ll post when I find the solution.
It´s not impossible I checked something the wrong way, I remember checking at the ****, but now that I think of it, I should have checked in the other end of the harness (where it goes into the mirror).
I think I´ve missed the bit of harness between the **** and the mirror.
It´s just that you don´t see what color the different wires have that go into the mirror assembly.
Guess I´ll have to identify each wire with a test light or something first.
Thanks for the responses this far, I´ll post when I find the solution.
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Joined: May 2006
Posts: 637
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Fixed...
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.
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.
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