My bike is a CBF500 ABS that was first registered 2007 in the Netherlands and later exported to Germany, where I bought it in 2016.
Last year in autumn the ABS indicator light started to blink, and the ABS did not work anymore. I brought the bike to a certified Honda garage. They said the error code indicated an electrical failure, and that they had fixed it by cleaning the electrical connections to the sensors.
After that the ABS worked for two days before the indicator light show up permanently and the ABS failed again. I did not get a refund for the 200 Euro socket cleaning job, so I looked for another garage, which then suggested that they would start switching parts until the ABS worked again. Each ABS sensor comes at 275 Euro, the main unit at 750 Euro (plus VAT and work time), so randomly changing parts seems like a rather expensive way to diagnose the problem.
At this point I am not instilled with huge confidence when it comes to Honda mechanics. I wonder if there is a way to narrow down the problem a bit before I go to yet another mechanic. I will not try to fix this myself, but it might at least help that I do not feel ripped off when they suggest yet another expensive fix.
That the ABS temporarily worked when they fiddled with the plugs seems to suggest that there might be a connection problem, maybe a broken wire between sensor and main unit. I wonder if there is a way to test this.
Obviously I googled first before asking here, but some answers suggested that simply applying the prongs of a multimeter to each end of the wire would be enough, while others said this would be a hugely complicated process and not something I could do myself. I am not the worst hobby mechanic in the world, but for some reason I am unable to understand how electricity works, so I could use a little help here. Also the CBF moniker is used for several models, and most answers refer to the 2015 model which seems to have a standard diagnostics port that my model lacks.