DaveO90S4 Posted 30January, 2023 Report Share Posted 30January, 2023 Hi all. I am trying to identify why neither the left nor right exterior electric mirrors on my 1981 924 Turbo work.At the control switch in the driver's door I have 6 wires, as follows:1A) Brown. This is a direct permanent ground connection. Brown. This is also a direct permanent ground connection.C) Black/Purple. This is 12v+ with ignition on (zero v with ignition off)D) Blue. ????E) White. ????F) Green. ????Of course there is also the mirror selection switch with three wires (green, Blue and Black). I am not at this stage concerned with the selection switch. I can toggle that when testing if necessary.What I want to do is bridge certain pins (above) to see if I can get either motor to do anything at all, to try to eliminate failure of both motors or at least to try to chase the cause of the problem to a particular part of the circuit. And if the motors are ok I want to do testing without killing them.I have ordered a Haynes 924 Turbo manual, that has yet to arrive. Have searched other threads too.Suggestions / advice / assistance etc all most welcomeThanksDaveO Quote Link to comment Share on other sites More sharing options...
P-Kay Posted 30January, 2023 Report Share Posted 30January, 2023 Been a while, but pretty sure you can put 12v to the blue/white/green wires as they control up/down/left/right https://rennlist.com/forums/924-931-944-951-968-forum/230410-does-anyone-have-a-picture-of-the-wiring-for-the-power-mirror-switch.html In my experience, it is typically the switch (joystick) on the door Quote Link to comment Share on other sites More sharing options...
Jaffar Posted 31January, 2023 Report Share Posted 31January, 2023 Dave, I had a similar problem on my early 944. There are 6 wires of which 2 are for the mirror heater, 2 for the motor and 2 for the solenoid. I got hold of the wiring diagram included in that Rennlist link above but the colours were different. I found that you can open up the motor mechanism and the one I had problems with, the issue was the solenoid. A fork had displaced itself. The connection plugs in the door are a real problem as the pins are hard to remove and they were very corroded. I replaced them with Deutch plugs. If you are testing in situ you need the centre toggle switch connected. Cheers. Quote Link to comment Share on other sites More sharing options...
DaveO90S4 Posted 31January, 2023 Author Report Share Posted 31January, 2023 Thanks Jaffar. I will let it all percolate for a few days while I do other stuff, and will spend that time really getting to thoroughly understand that part of the wiring diagram. I've been spending time today getting front bumper : mudguard gaps right. RH side is spot on I think. LH side is acceptable, maybe another 1-2 mm of adjustment required. It will be a couple of weeks before I can return to this project, by which time my new carpet should have arrived. Cheers DaveO And thanks P-Kay too for the wiring diagram. I have four toggle switches to choose from, 2 new, 2 used. No luck with any of them. So I think the problem is elsewhere, unfortunately. Cheers DaveO P-Kay 1 Quote Link to comment Share on other sites More sharing options...
Jaffar Posted 31January, 2023 Report Share Posted 31January, 2023 The toggles are rebuildable. They have little contacts inside that can get displaced. Quote Link to comment Share on other sites More sharing options...
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