Clock

[peterbaron]

Updated post

This clock has very simple circuit. I used 2013-2014 service manual for CB1100 ('13 model) non-ABS electrical diagram as per p. 20-2

1. at the meter/cluster - 15/multi-pin conector (based on electrical diagram/pic)** - R/G* wire goes through 6P connector to the 10A - E fuse in the fusebox, then it changes colour to R and it splits to the ognition sw and regulator/rectifier.
2. ground must be common for the meter/cluster but I do not think is the issue, however it's possible if the cluster's printed circuit is a hair cracked....or..

I would check for an intermittent poor connection by recheckig the cluster-15 pin** & 6P & E-fuse connections, by simply disconnecting, inspecting, cleaning/or other proper action.
I think the issue is present when (the bike) and connectors cool down, shrink and momentarly make poor contact to the clock circuit... then everything warms up, expands and all is is back to normal again....or during the voltage spike, the moment when the ignition is turned ON....
Use magnified glass to inspect.
Very common issues in automotive.

*R/G - there is only one R/G wire of this colour at the cluster 15-pin** connector and is easy to be located, as it sits at the connector's end/corrner.. 
The Red/Green wire should have B+ at all times/memory, even if the ignition is off
There is an P/W wire on the oposite end of that connector,**, see pic. 
6P connector is located in the head lamp bucket at 12 o'clock and is a 3 row x 2 pin connector.
The multi-point/15-pin** connector directly connects the cluster printed circuit.
You shuld have no problem finding, indentifing connectors due to your previous "ants" investigation
** the single 15 pin to meter/circuit board connector as per p.20-2 might be a double one of 6 & 9 space combination as per p. 19-12 of the said service manual
Here is the link that clarifies the cluster sub harnes issue, part # 5 - 2 to 2 end connectors.
https://oem-bike-parts.com/en/parts/hond.../f-2-meter
Here is a video clip for even further and visual clarification:
https://www.youtube.com/watch?v=aEMKcnTuzMY
I hate how Honda names, numbers  and indicates their connectors and pin locations in this service manual.



https://cb1100forum.net/forum/showthread...#pid272809