Author Topic: Rostra Cruise Control Wiring Diagram  (Read 24727 times)

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Offline Fred_Harmon_TX

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Rostra Cruise Control Wiring Diagram
« on: August 16, 2012, 11:29:58 pm »
I got asked some questions about wiring up a Rostra cruise control yesterday, and just decided it would be easier to make a diagram than to try to explain it. So here it is. This is using the Audiovox switch, and it shows all the connections to the bike including the additional brake light relay you'll need.

http://www.pbase.com/fredharmon/image/145443506

« Last Edit: April 03, 2014, 01:21:17 pm by Fred_Harmon_TX »
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Offline Fred_Harmon_TX

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Re: Rostra Cruise Control Wiring Diagram
« Reply #1 on: August 17, 2012, 01:47:03 am »
By the way, I just want to mention that the reason the red wire from the control switch goes all the way back to the brake light switch to get power is because it is a designed in safety feature. This way if your brake light fuse blows, the red wire will loose power and the cruise will shut itself down and won't allow you to engage it. You could run the red wire straight to the accessory power with the other two power leads, but then if your brake light fuse blows and you apply the brakes, the cruise won't disengage. So there is a method to the madness. It's a little more work to run another lead all the way back to the brake switch to get power for it, but that's the proper way to do it.
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Offline fartymarty

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Re: Rostra Cruise Control Wiring Diagram
« Reply #2 on: August 17, 2012, 04:28:23 am »
 :goodpost:

It's a little more work to run another lead all the way back to the brake switch to get power for it, but that's the proper way to do it.
There's always the front brake switch which is electrically the same and less wire to run.
Very good point about getting the power from the brake circuit for safety.

Fantastic drawing.
Fred, you're making it too easy for everyone, do you have a financial piece of Rostra?  ;D

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Re: Rostra Cruise Control Wiring Diagram
« Reply #3 on: August 17, 2012, 09:09:04 am »
Thanks Fred!
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Offline Fred_Harmon_TX

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Re: Rostra Cruise Control Wiring Diagram
« Reply #4 on: August 17, 2012, 11:52:52 am »
I made some minor edits to the drawing to show the engaged LED circuit and some other clean up and reloaded the new one above.
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Offline Gypsy JR

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Re: Rostra Cruise Control Wiring Diagram
« Reply #5 on: August 17, 2012, 02:20:02 pm »
:goodpost:

It's a little more work to run another lead all the way back to the brake switch to get power for it, but that's the proper way to do it.
There's always the front brake switch which is electrically the same and less wire to run.
Very good point about getting the power from the brake circuit for safety.

Fantastic drawing.
Fred, you're making it too easy for everyone, do you have a financial piece of Rostra?  ;D

I know I read somewhere someone put the brake toggle relay up front, I just can't remember where it was posted. No reason it wouldn't work exactly the same up front.

I just ran mine to the back because Brian's How-To said to run it back there, so didn't bother to think about putting that relay up front also.
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Offline BDF

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Re: Rostra Cruise Control Wiring Diagram
« Reply #6 on: August 17, 2012, 10:02:47 pm »
Nice job Fred.

I just wanted to point out a couple of things that may trip up some folks.

1) When I cut into a wiring harness, I usually try to cut into the component side of the harness rather than the main (or bike) side. So when I wired into the VSS, I chose to cut the cable between the connector and the sensor itself. Fred has shown it done the other way, between the connector and the bike. Both ways are fine and valid but this particular sub harness has a quirk- there is a pink wire on each side of the connector and they are NOT the SAME CIRCUIT. So if you look at my tutorial and note that I tap into the 'pink' wire, note also that it is on the sensor side of the connector. If you wire it as Fred has shown, you cannot use the pink wire on that side- Fred's colors are correct. The point here is that it could confuse someone by cutting into the 'other' side of the harness and grabbing the wrong wire. I have not seen another harness that has the same color wire used in two different circuits so this is really kind of an oddball on the bike.

2) Fred's schematic is correct in showing how to use an LED for the engaged circuit but if used that way it must be an LED that is made to work on 12 volts. Read the package the LED comes in and note the voltage or the 'forward voltage'; raw LEDs are usually in the 2- 3 volt range and need to be wired in series with a resistor to work on a 12 volt circuit. On the other hand, if using something like an indicator type LED with a pair of wires already soldered to it, they usually already have a resistor inside them to work directly with 12 volts. Again, just read the package the LED comes in or read the specifics of an LED you are going to buy online. And as always, you can post the part number of the LED you plan on using as ask if it will work and I am sure someone will help out.

The amount of information on Rostra installs on C-14s is increasing and overall that is a good thing but because of the different ways different people have done things, it could be confusing to someone that is not really familiar with electrical properties and wiring. Again, none of the information I am aware of is wrong, just different and the trouble can come from confusing several different people's renditions of their specific installation. Installing a Rostra is not a trivial project so the best thing is to do your very best to understand why the procedures are shown as they are before starting. And, of course, ask first- it is easier than us trying to help you find the fried components across the 'Net and then correcting the original mistake.

Brian

I got asked some questions about wiring up a Rostra cruise control yesterday, and just decided it would be easier to make a diagram than to try to explain it. So here it is. This is using the Audiovox switch, and it shows all the connections to the bike including the additional brake light relay you'll need.

http://www.pbase.com/fredharmon/image/145434899


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Offline Fred_Harmon_TX

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Re: Rostra Cruise Control Wiring Diagram
« Reply #7 on: August 17, 2012, 11:08:01 pm »
Brian, good point about the LED. I had forgotten I put a resistor on it. I'll go back and edit the drawing and add it in. I think I used a 200 ohm one on mine, but it will vary depending on the LED you use. I used an amp meter and chose a resistor that provided about 20 milliamps of current when the LED was connected between power and ground.
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Offline Fred_Harmon_TX

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Re: Rostra Cruise Control Wiring Diagram
« Reply #8 on: August 17, 2012, 11:21:57 pm »
Resistor added to drawing for Engaged LED. But I didn't put a value on it. I'd probably suggest to start out with 200 ohms and see how it works.

One of the reasons I wanted to include the bike side of the wiring diagram in the circuit was exactly the reason Brian mentioned about the connection to the speed sensor, as you can clearly see the color change of the wires as they pass through the connector. I also agree that the PINK wire is rather confusing. Since there is only one Blue/Yellow wire, I felt it safer to show a connection to it, since there is less chance to get it wrong that way. You can also see the connection for the NSS wire changes as it goes through the connector from black to Red/Green. Same thing happens at the brake light switch connector as well. This is why I wanted to put it in a diagram so you could see exactly what goes where and the color codes of all the wires. Hopefully this will be helpful to others in the future.
« Last Edit: August 17, 2012, 11:30:10 pm by Fred_Harmon_TX »
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Offline fartymarty

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Re: Rostra Cruise Control Wiring Diagram
« Reply #9 on: August 19, 2012, 10:14:33 pm »
Is there any chance this diagram link could be stickied up in the farkles directory? Or perhaps by itself?
 I just don't want it to drift down and end up 8 pages back. I don't need it any more,
but until Mama Kaw offers a factory CC, or Rostra goes out of business, it's going to be needed by others.

Offline Fred_Harmon_TX

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Re: Rostra Cruise Control Wiring Diagram
« Reply #10 on: August 19, 2012, 11:54:03 pm »
The diagram is permanent loaded on my cruise control photo gallery here:

http://www.pbase.com/fredharmon/audiovoxcruise

Murph also has a copy, since he is the one who asked me for it.
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Offline Unclesteve

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Re: Rostra Cruise Control Wiring Diagram
« Reply #11 on: August 20, 2012, 09:06:41 am »
By the way, I just want to mention that the reason the red wire from the control switch goes all the way back to the brake light switch to get power is because it is a designed in safety feature. This way if your brake light fuse blows, the red wire will loose power and the cruise will shut itself down and won't allow you to engage it. You could run the red wire straight to the accessory power with the other two power leads, but then if your brake light fuse blows and you apply the brakes, the cruise won't disengage. So there is a method to the madness. It's a little more work to run another lead all the way back to the brake switch to get power for it, but that's the proper way to do it.

Fred,
 I ran to the front brake wire and saved myself a ton of work.  It has the same outcome and it is so much easier to tie in up front.  Everything you need is under the right front fairing panel.

Offline Fred_Harmon_TX

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Re: Rostra Cruise Control Wiring Diagram
« Reply #12 on: August 20, 2012, 10:54:04 am »
Fred,
 I ran to the front brake wire and saved myself a ton of work.  It has the same outcome and it is so much easier to tie in up front.  Everything you need is under the right front fairing panel.

Electrically, it makes no difference where you tie into the brake circuit (front or rear) since they are tied together. It's just a matter of where you want to do it. It may indeed be easier to tie in up front, I just used the rear because it was easy for me to find and I had plenty of space back there for my relay.
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Offline Gypsy JR

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Re: Rostra Cruise Control Wiring Diagram
« Reply #13 on: August 20, 2012, 11:25:01 am »
By the way, I just want to mention that the reason the red wire from the control switch goes all the way back to the brake light switch to get power is because it is a designed in safety feature. This way if your brake light fuse blows, the red wire will loose power and the cruise will shut itself down and won't allow you to engage it. You could run the red wire straight to the accessory power with the other two power leads, but then if your brake light fuse blows and you apply the brakes, the cruise won't disengage. So there is a method to the madness. It's a little more work to run another lead all the way back to the brake switch to get power for it, but that's the proper way to do it.

Fred,
 I ran to the front brake wire and saved myself a ton of work.  It has the same outcome and it is so much easier to tie in up front.  Everything you need is under the right front fairing panel.

Any chance you have a photo or good description of which wire to tap ? If I ever have to do mine again I would like to move the brake toggle relay up front.
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Offline fartymarty

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Re: Rostra Cruise Control Wiring Diagram
« Reply #14 on: August 20, 2012, 02:42:33 pm »

Fred,
 I ran to the front brake wire and saved myself a ton of work.  It has the same outcome and it is so much easier to tie in up front.  Everything you need is under the right front fairing panel.


Any chance you have a photo or good description of which wire to tap ? If I ever have to do mine again I would like to move the brake toggle relay up front.


The wire colors are the same as in Fred's drawing, they are under the bundle at the right front of the C14.
The red Rostra wire with the 4 amp fuse attaches to the right front bundle red wire w/blue stripe. The right
 front bundle blue wire w/red stripe is attached to terminals 86 and 87 of the relay. My notes on the photo
could be misleading, so to be clear, you want to simply attach Rostra wires to existing C14 wires ("tap into"), not cut nor redirect
any existing C14 wires.




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Re: Rostra Cruise Control Wiring Diagram
« Reply #15 on: August 20, 2012, 03:20:51 pm »
.... when I wired into the VSS, I chose to cut the cable between the connector and the sensor itself. Fred has shown it done the other way, between the connector and the bike. Both ways are fine and valid but this particular sub harness has a quirk- there is a pink wire on each side of the connector and they are NOT the SAME CIRCUIT. So if you look at my tutorial and note that I tap into the 'pink' wire, note also that it is on the sensor side of the connector. If you wire it as Fred has shown, you cannot use the pink wire on that side- Fred's colors are correct. The point here is that it could confuse someone by cutting into the 'other' side of the harness and grabbing the wrong wire. I have not seen another harness that has the same color wire used in two different circuits so this is really kind of an oddball on the bike.

Good cautionary point out Brian.  :great:

Question: Is there a better place to tap into the Blue w/yellow stripe speed sensor wire up on top? I tapped into the pink
wire as per Brian's instructions, but if I can get rid of that long wire going down there and replace it up top, I'd like to do it
now while my covers are off. Thanks.

Offline Cap'n Bob

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Re: Rostra Cruise Control Wiring Diagram
« Reply #16 on: August 20, 2012, 03:41:32 pm »
This thread could beneficial to folks, so as long as know one has a problem with it.  I'm going to sticky this thread for now.

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Re: Rostra Cruise Control Wiring Diagram
« Reply #17 on: October 08, 2012, 11:22:59 pm »
I got asked some questions about wiring up a Rostra cruise control yesterday, and just decided it would be easier to make a diagram than to try to explain it. So here it is. This is using the Audiovox switch, and it shows all the connections to the bike including the additional brake light relay you'll need.

http://www.pbase.com/fredharmon/image/145443506





 ??? ???  errr...yea Fred...aha...yea...this is all I needed...ah...got it...how how is it that you do this?
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Offline Fred_Harmon_TX

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Re: Rostra Cruise Control Wiring Diagram
« Reply #18 on: October 09, 2012, 12:07:33 am »
I got asked some questions about wiring up a Rostra cruise control yesterday, and just decided it would be easier to make a diagram than to try to explain it. So here it is. This is using the Audiovox switch, and it shows all the connections to the bike including the additional brake light relay you'll need.

http://www.pbase.com/fredharmon/image/145443506





 ??? ???  errr...yea Fred...aha...yea...this is all I needed...ah...got it...how how is it that you do this?


If you don't understand this wire diagram, then I'd probably suggest not trying to tackle this project on your own.
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Offline nando

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Re: Rostra Cruise Control Wiring Diagram
« Reply #19 on: October 09, 2012, 01:07:04 am »
Fred,
I was thinking about letting the stealer do it for me. There is supposed to be a really good one at a shop here.

I am understanding in the installations that there has to be a hole drilled in there somewhere?

I could take the instructions to the mech here see what he says.
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Re: Rostra Cruise Control Wiring Diagram
« Reply #20 on: October 09, 2012, 01:51:46 am »
The hole gets drilled on the arm at the throttle bodies,   Find a GOOD tech who can do this for you and make sure he/she is one you can trust.  This job isn't that difficult to do right,  but it's also easy to do wrong....  (Or see if you can find a nearby cogger who has done it before that you can bribe with steak and beer :) )
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Re: Rostra Cruise Control Wiring Diagram
« Reply #21 on: October 09, 2012, 02:13:49 am »
Day and night I search for Coggers...nothing around here.

Someone said at the shop a cop owns one, and a guy working at the airport...but I feel like the lone-ranger without Tano riding this rig...its alright! I dont mind being unique.

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Re: Rostra Cruise Control Wiring Diagram
« Reply #22 on: October 09, 2012, 10:41:13 am »
I have a lot of photos online showing both the Audiovox and Rostra install.

http://www.pbase.com/fredharmon/audiovoxcruise

If you'll buy me an airplane ticket to Hawaii, I'll be happy to come out there and install it for you.
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Re: Rostra Cruise Control Wiring Diagram
« Reply #23 on: November 14, 2012, 04:14:32 pm »
I have a lot of photos online showing both the Audiovox and Rostra install.

http://www.pbase.com/fredharmon/audiovoxcruise

If you'll buy me an airplane ticket to Hawaii, I'll be happy to come out there and install it for you.
Fred, Which is the better of the two (Rostra or Audio). Christmas is around the corner and wifey is asking what I want.  >:D
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Offline Fred_Harmon_TX

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Re: Rostra Cruise Control Wiring Diagram
« Reply #24 on: November 14, 2012, 05:13:31 pm »
I have a lot of photos online showing both the Audiovox and Rostra install.

http://www.pbase.com/fredharmon/audiovoxcruise

If you'll buy me an airplane ticket to Hawaii, I'll be happy to come out there and install it for you.
Fred, Which is the better of the two (Rostra or Audio). Christmas is around the corner and wifey is asking what I want.  >:D


I've used and installed both, and I much prefer the Rostra. It's less complicated to install (no vacuum lines) and holds speed in a more consistent manner, since it doesn't rely on fluctuating engine vacuum pressure.
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