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This bugs me also on the Coupe (MY94) - but the 92 V6Q has 1TWU - brilliant...
I'll try to get a look at schematics to see if there any obvious differences - problem is that schematics won't call out which relay variant is in play.
My quick synopsis of the relay pinout used there -
01 = 15 - 12V with ignition ON
02 = 30 - 12V permanent
04 = 61 - 12V when engine running, signal from alternator - seemingly only applicable to 1TWU
05 = TK1 - connects to drivers door switch... windows disabled when door opened when engine OFF (or is it when key is out)
08 = 87 - Normally open contact
11 = 87a - Normally closed contact (when relay coil energised)
12 = 86 - Coil positive
13 = 85 - Coil negative
14 = 31 - 0V Earth
15 = 87b - Normally open contact (tied to 87)
Assuming the 30,85,86,87 denominations assume a standard relay topology...
When the coil is NOT energised, 12V is applied to 87a
When the coil is energised 12V is applied to pins 87 and 87b
Not sure the normal relay pinout is applicable - especially as 87 connects to the sunroof switch... Revised logic follows -
01 = 15 - 12V with ignition ON
02 = 30 - 12V permanent
04 = 61 - 12V when engine running, signal from alternator - seemingly only applicable to 1TWU
05 = TK1 - connects to drivers door switch... windows disabled when door opened when engine OFF (or is it when key is out)
08 = 87 - Provides 12V output when control module is active (ignition on or ignition off after shutdown as long as door not opened)
11 = 87a - 12V output when coil energised one way
12 = 86 - Coil positive
13 = 85 - Coil negative
14 = 31 - 0V Earth
15 = 87b - 12V output when coil energied the other way
I'll check the behaviour of door switches on both my early Saloon and my later Coupe - I can't remember if they are open or closed when doors open - the schematic doesn't have any sense of conveying this.
I agree thats how i figure it, when the door opens it completes a circuit to ground,
Door switches work fine with the original B relay. I just cant get the C relay to disable when wired in. By default if you plug a C or D relay into the car pin TK1 isnt connected to anything. My problem is it wont work even when connected
91CQ20v - Gone to a new home
93UR-S4 - The Magic Carpet
94S2Bus - The Emerald Express
Logic tells me door switches should be CLOSED when doors are open - how else would interior light circuit work...
DOes your interior lights work ?
Yes they do. When i stop the engine and open the doors, windows still work, then i close the doors, they stop working. It is diference between relays. Now i have in relay D, have tried with some older ones ( A, B ) and then windows stop working when i open the doors.
Had half an hour to myself this morning and pretty much worked out how the electric window relay works - the schematic aint exactly intuitive... I can do a kind of 'demystifying' guide if there is enough interest - with simple how-to-steps for testing the relay and window switches.
I'd like to reverse engineer the internals of the early and late relay modules - with the faint hope of grafting in the extra logic and timer for 1TWU operation with the later relay. That'll take a bit longer but might be fun.
Here's a thing I bet nobody notice about 1TWU operation... when it is activated - the little light on the window switch goes out for ~10 seconds - the duration of the timer circuit.
I figured this would happen when looking at the schematic, then proved it when I tested on my older 80 earlier today.
Here's a thing I bet nobody notice about 1TWU operation... when it is activated - the little light on the window switch goes out for ~10 seconds - the duration of the timer circuit.
I figured this would happen when looking at the schematic, then proved it when I tested on my older 80 earlier today.
Yes, mine does that. My relay is a rev 'C' I think.
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What part number is the relay in your V6?
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