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Discussion Starter · #1 · (Edited)
Hi
My 2002 K1200RS's Digital display (Clock/Gear indicator LCD) has simply packed up over the weekend and fails to display anything at all. Worked on last ride a week ago and just doesn't work at all now. Never went intermittent or inaccurate, just stopped displaying.

I've checked the fuses and have determined that there is 12V to the connector behind the instrument console to the LCD when the ignition is turned on.

Having spoken to my (not so) local BMW technician he's sugged that there should be a permanent 12V supply to the clock (i.e. even when ignition is off). This is not happening, none of the 6 connectors is live when the ignition is off.

He further suggested I remove the tank and look for corroded/damaged cables in the electrical connections box/ radiator area. I cannot see any problems here either.
I have reseated all connections but no success.

I am now wondering if the "load relief" relay may be at fault here, but I'm unsure of its function.

Any thoughts / ideas would be appreciated, I'm about to start studying the wiring diagrams but am not hopefull.

Steve
 

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SteveN said:
Having spoken to my (not so) local BMW technician he's sugged that there should be a permanent 12V supply to the clock (i.e. even when ignition is off). This is not happening, none of the 6 connectors is live when the ignition is off.
Steve,
Your tech's suggestions seem appropriate. My clock displays the time when the ignition is off.
 

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addition

I had exactly the same problem. Assuming you've checked all the fuses (F5, 4A), if there is no supply there will probably be a wiring break in the steering head end of the loom which moves. If the supply is broken you shouldn't be seeing gear display either (??) If you see the gear display and no clock, chances are the problems inside the head on the clock circuit board.

The +12V supply should be on pin 1 of the connector, probably running to a skimpy red/black wire back to F5, just waiting to corrode or break.

I didn't waste time unpicking the loom to find the break, I just disconnected the original wire, taped the end and ran in a new wire from fuse F5. You can fish a wire through under the tank, but it's best to tidy it up next time the tank is off.

I just noticed that F5 perm. 12V feeds the ignition switch connector pin 2 going to wire Red. Check this is +12 when ignition off with a meter, and link across from there.

The load relief relay has nothing to do with it. The supply must always be present, ignition off, else the clock will stop and reset!



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Discussion Starter · #4 ·
Found it!

Thanks for the replies. Voxmagna your almost spot on. I think my wiring may be diferent than yours:
Looking at the socket (female pins) at the connection 3 inches from LCD display at the back of the instrument panel the layout is as follows:
--------------------
(6) (5) (4)
(3) (2) (1)
--------------------

Cable colurs are:
Pin 1: Yellow/Blue
Pin 2: Yellow/Black
Pin 3: Yellow/White
Pin 4: Brown
Pin 5: Red/White
Pin 6: Green/Black

I "think" Pins 1 through 4 are for the digital gear display

Pin 6 (Green/Black) goes to +12V with ignition switch in ON position and OV in OFF.
Pin 5 (Red/White) which showed no voltage yesterday, today varies between 3V and 7V
depending on how I manipluate the white socket connector (which has a Red/White cable to it) in the connections box behind the RHS radiator, particulalry since I removed the cable tie holding the bunch of cables near the radiator cowel / engine casing.
I pierced the Pin 5 (Red/White) cable with a needle as it goes into the back of the instrument pod and connected this direct to the battery +12V, BINGO display shows "1:00".

So LCD Display is OK, I now need to replace the wire or as suggested jumper to nearest permanent 12V.

Bike has 9000 Miles on clock, new in September 2002, a bit worrying really! Still could be worse could have been a more important wire and stopped me riding it.


Thanks again
Steve
 

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Agree. That's a little wierd. Shouldn't be having wires fail on such a new bike. --Jerry
 

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Sorry, I mean't to say my K's '97, I never trust wiring colors anyway, but you got the gist in the end. If I'd stripped the loom back I could have backed up my theory it's broken at the top end. Yes the others are for gears, but they are grounds and the only supply is the one you found.

........Bike has 9000 Miles on clock, new in September 2002, a bit worrying really! Still could be worse could have been a more important wire and stopped me riding it.

Well now I told you that the wire from the ignition switch to F5 is permanent 12V, that would definitely stop you running, but I haven't got the diag. handy to say if it's thicker and less likely to break or not.



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Thanks

Having bought my K1200RS two weeks ago (97) with 24K and no clock/gear indicator I was a happy bear to find this thread. :)

I now have a clock/gear indicator :D

Thank you guys, you've made my weekend :tim


Will
UK
 
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