Sorry in advance for the long post.
I installed a Rostra electric cruise control on my 2012 DL650 Adventure. I had installed two aftermarket cruise controls on cars before so while I wasn’t looking forward to the v-trom cc install, I really wasn’t intimidated by it either.
When I went out for a test ride after the Rostra was installed the LED “on light” on the cc switch lit up so I thought that was a good indication the cc might be working, but I only got down the street before I noticed my speedometer was reading zero miles an hour. The tachometer worked fine as did the tail light and brake light. The speedometer had been working okay before the Rostra install. I came right back home without testing the cruise control. I attributed the malfunction to the cheap tap-in connectors provided with the Rostra unit. I did use them as a temporary solution and was going to upgrade the connectors or just simply solider them later once I knew everything was up and running.
So I soldered the gray wire from the Rostra main harness to the pink/white VSS wire eliminating the cheap plastic connector thinking that would solve the problem, but a test ride still resulted in the speedometer reading zero miles an hour. During the test I got the bike above 45 mph (GPS indicated) and tried to engage the cc, but I guess not surprisingly it didn’t work.
I have inspected the wiring and everything looks okay, although I did shorten many wires and removed those ‘through the firewall connectors’ so the wiring harness doesn’t resemble its original self and unfortunately it is still more than just a little bit of an unmentionable cluster. All of my wire colors seem to be matched up correctly and it looks like they are going to the right places.
I removed and inspected the VSS sensor itself, but there isn’t much to see. I had installed a Scottoiler (a decision I am somewhat starting to regret) and wanted to make sure the VSS unit didn’t have some kind of oil spatter issue, but it didn’t nor did any of the wires or connectors. I checked for continuity of the pink/white wire from the connector where the VSS unit connects around mid bike just above the VSS unit itself to the up front connector on the front left side of the fairing just past where I spliced into the pink/white wire and its fine. The continuity between the Rostra main unit connector gray wire and the front pink/white wire connector is also okay. The wiring seems to all be okay. So in other words my continuity test indicates that even if I completely remove the Rostra unit and wiring and solder the pink/white VSS wire back to its original condition, the speedometer is still going read zero miles an hour. The VSS isn’t picking up the pulse. I did unhook the negative terminal on the battery before I started any wiring and didn’t reconnect it until I finished everything.
I’m clueless at this point and don’t know what to try next. Is there an easy way to test the VSS unit with a multi-meter? Could one of those cheesy tap-in connectors have caused some kind of short or incomplete circuit which caused the VSS unit to short out?
Oh and to add insult to injury, I found the rubber bushing thingy pictured below lying on the garage floor and I don’t know what it is or where it came from, does anybody recognize it? Once again sorry for the long post and many gracious thanks to anybody that can help out.