Rostra cruise control mystery
Rostra cruise control mystery
(OP)
My problem:
I have installed the "Rostra" aftermarket cruise control in both my street rod that I built and my motorcycle.
Either unit works perfectly in the street rod. But when installed on my motorcycle here is what happens:
It randomly works when I first fire it up. Usually (not always) it works fine until I come to a stop. Then (most of the time) it wont lock up again... until I (1)come to complete stop and (2) turn the motor off and back on. Then it will(usually) lock up (as many times as I like) until I come to a stop again. Anything other than doing the two steps outlined above wont reset it.
The only difference between the street rod and the motor cycle is... the street rod has a 4L60-e transmission and I use the VSS signal for speed input. The motor cycle has no VSS unit so I mounted 2 magnets on the rear wheel along with Rostra's coil pick up. And of course, I select the proper pin switch positions for that configuration. Again, when it works, it works great.
I have gone over the harness too many times to count and anyway I don't see how it could be a wiring problem since it does work some of the time. It can't be the unit itself since both work fine in the street rod.
For some reason the engine has to be turned off/on while the rear wheel is stationary to get a good reset. That's what has me stumped.
(Rostra customer service wont talk to me when they find out the unit is installed in a motorcycle).
I have installed the "Rostra" aftermarket cruise control in both my street rod that I built and my motorcycle.
Either unit works perfectly in the street rod. But when installed on my motorcycle here is what happens:
It randomly works when I first fire it up. Usually (not always) it works fine until I come to a stop. Then (most of the time) it wont lock up again... until I (1)come to complete stop and (2) turn the motor off and back on. Then it will(usually) lock up (as many times as I like) until I come to a stop again. Anything other than doing the two steps outlined above wont reset it.
The only difference between the street rod and the motor cycle is... the street rod has a 4L60-e transmission and I use the VSS signal for speed input. The motor cycle has no VSS unit so I mounted 2 magnets on the rear wheel along with Rostra's coil pick up. And of course, I select the proper pin switch positions for that configuration. Again, when it works, it works great.
I have gone over the harness too many times to count and anyway I don't see how it could be a wiring problem since it does work some of the time. It can't be the unit itself since both work fine in the street rod.
For some reason the engine has to be turned off/on while the rear wheel is stationary to get a good reset. That's what has me stumped.
(Rostra customer service wont talk to me when they find out the unit is installed in a motorcycle).





RE: Rostra cruise control mystery
Dan - Owner
http://www.Hi-TecDesigns.com
RE: Rostra cruise control mystery
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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
RE: Rostra cruise control mystery
RE: Rostra cruise control mystery
Below is an image of one of the mounts I fab'd for the magnets. The manual says to use 2 on a front wheel drive car which would equate to a motorcycle rear wheel. I have tried both 2 and 3 magnets. No difference, no change. I would not know how to check for a 'clean signal' but the magnets all have about the same amount of attraction and pass the coil within about 3/8th of an inch.
dgallup.
I have checked voltage several times with pretty much the same result each time... never drops below 12.2 at low idle. Typically shows around 14.4 at higher rpm.
That said, I have even placed a spare (fully charged) M.C. battery in a saddle bag and hooked up the cruise control to it with nothing else hooked up to it. Same result.
LionelHutz,
I have added a relay so that when the brake circuit is energized, the 30-87 pins close from a ground wire secured directly to the negative battery post to the proper CC wire.
Thanks for the suggestions!
RE: Rostra cruise control mystery
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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
RE: Rostra cruise control mystery
I certainly don't understand why it fixed it (given the sequence of events required to get it working previously) but at this point I guess I don't really care since IT WORKS!