07 Road King Cruise control problem - Harley Davidson Forums: Harley Davidson Motorcycle Forum
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Old 04-07-2012, 08:59 PM   #1 (permalink)
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07 Road King Cruise control problem

My cruise control started working intermettently. It would just shut off and then you would have to reset it. Then it stop working all together.

I replaced the resume and set switch because I was getting low voltage at the Cruise control modual. That did not fix it. I now get good voltage at the Resume / Accel pin and the SET / Coast pin. The throttle rolloff switch is working OK. I get 12vdc to the cruise control module when I roll back the throttle. The brake signal works ok - only get 12vdc when breaks are on. Got a good ground on pin E. 12vdc on pin A when the Cruise control switch is on. 12VDC when the ignition is on at pin F.

I have 12vdc on the engine speed pin H from the ECM and 5 vdc on pin K from the ECM - not sure if that is right as it is a computer and I don't know what should be coming out of the ECM.

I have verified every pin several time.

So I replaced the Cruise control Module - nothing Changed.

I get the orange light on the speedometer and it never changes to green. I know the green light works because I can ground the pin J ( set Lamp) and the light turns green.

I can not do a cable lash initialization. I never get the green light.

Does anyone have any suggestions or can tell me if I am getting the right signal from the ECM.

I am at a lose.
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Old 04-07-2012, 09:19 PM   #2 (permalink)
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When you read the pins out did you check them for security? You may have a loose pin on the male or female side that retracts just enough to cause you problems. Take a pair of needle nose and just wiggle each pin. The pin should not slide in and out.
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Old 04-08-2012, 07:09 AM   #3 (permalink)
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Does the speedo work ??? Did you run the speedo diagnostics program ??? Does the ECM show any stored codes ???
The ECM sensor signals are 5 volts reference .
If the speedo is intermittent remove the speed sensor and clean the magnet . The cruise module needs to see a speed signal to function .
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Old 04-08-2012, 08:41 AM   #4 (permalink)
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Speedo works. No codes in the ecm. Not sure how to run the speedo diag but will try look into it. Thanks

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Old 04-08-2012, 08:52 AM   #5 (permalink)
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Hold the trip button in while turning on the ignition , diagnostics will show in the odometer window .
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Old 04-08-2012, 09:02 AM   #6 (permalink)
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Ok. Thats how i read that i had no error codes in the ecm. I thought u were suggesting there was a seperate speedo diag for just the speedo. Thanks

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Old 04-08-2012, 09:28 AM   #7 (permalink)
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Quote:
Originally Posted by craigf View Post
Ok. Thats how i read that i had no error codes in the ecm. I thought u were suggesting there was a seperate speedo diag for just the speedo. Thanks

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There is , it's read as "sp" . Press the button when "sp" comes up and it'll show speedo codes .
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Old 04-08-2012, 10:33 AM   #8 (permalink)
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OOps,

When I ran the diags from the speedometer, I ran them for the P, S, SP and T. There were no codes shown as "NONE" came up each time.

Sorry, I thought that was what you meant by ECM codes.

So in answer - there were no speedo error codes.

Thanks
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Old 04-08-2012, 10:42 AM   #9 (permalink)
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You know what , I've seen the cruise cable come off the stud on the side by the throttle linkage . Follow the cable down to where it attaches to the throttle linkage and make sure it's snapped in place tight .
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Old 04-08-2012, 11:00 AM   #10 (permalink)
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Thanks but I already checked all of the linkage twice, including the connection where the cable connects to the cruise control module.
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