Was riding on a long trip on my 22 Heritage and stopped to get gas . When I got back on the interstate the cruise wouldn't engage . I did the diagnostic test to see if it was any of the switches front and rear brake , clutch and rolling the throttle forward . When in diagnostic mode none of the four made the cruise symbol turn green . I know all four of them aren't bad has to be something else . Also checked for codes and everything was ok . What else should I check ?

 

Is the brake light stuck on like it was in your other thread?

 

No that was the first thing I checked .Both brake light switches are operating properly. It's odd it turns green when you push it down just doesn't engage .

 

You said you checked for codes and if the green light is on it should work. This would force me to go to a Harley dealer and that's something I don't like to do. Keep us updated on your fix.

 

Yes no codes and green light does come on but throttle doesn't lock. I did the diagnostic check on the switches and it showed none of them were working. Supposedly there's a fuse for the cruise control but I can't locate it .

 

I'm sure there is no fuse with this CanBus.

It's interesting that the light is turning green as if it were engaged yet it won't hold speed. It's not really a throttle lock since it is ride by wire but I'm sure you know that. So, what's happening is 1) driving down the road at say 45 mph 2) you turn on cruise by pressing the button and you get a yellow light. 3) you press down on the button to SET the cruise and it turns green. 4) you let go of the throttle and the bike decelerates because cruise isn't working. 5) you hit the brake or clutch and the green light goes out, cancelling the cruise control? Or does the green light go out at a different point?

Did I describe that correctly?

I had something like this happen on my Goldwing where it would come on but immediately cut. I had adjusted my rear brake pedal and I found that my foot just barely touched the pedal which would disengage the cruise control. I was able to adjust the switch so it was less sensitive and that fixed the problem. My experience with the Harley is that the brake switch controls both the brake lights and cruise cutoff but I don't know that much about it.

 

Here's what is in the service manual regarding cruise control....The ECM controls and monitors the operation of the vehicle cruise control. The cruise switch allows the control circuit to be enabled or

disabled and, when enabled, the lamp illuminates.

The CRUISE/SET/RESUME switch automatically regulates the speed of the vehicle. It is located on the LHCM and is a three position

momentary switch, spring loaded to the center position.

CRUISE: Press the CRUISE switch to enable cruise control. The cruise control indicator lights orange. Pressing the CRUISE switch

again turns off cruise control.

SET/-: With cruise control enabled, press SET/- to set cruise to current vehicle speed. The cruise control indicator lights green. While

at cruising speed, press SET/- to reduce speed.

RESUME/+: While at cruising speed, press RESUME/+ to increase speed. If cruise control is disengaged (such as a braking event),

press RESUME/+ to resume the previous cruising speed.

Table 1. Code Description

DTC DESCRIPTION

P0577 Cruise control input error
-----------

Cruise control switch interactive diagnostics are provided to allow testing of the cruise control inputs without the use of a service tool.

Note that the diagnostic mode is only available if cruise control has been selected. The cruise engaged lamp is used to verify that each

switch is activating properly.

Diagnostic Mode Entry

To enter diagnostic mode:

1. Turn IGN ON.

2. Press cruise enable to turn on the orange cruise enable lamp.

3. Turn IGN OFF.

4. Hold the cruise SET switch ON while switching IGN ON.

Switch Verification

In the diagnostic test mode, the green cruise engaged lamp is illuminated whenever any of these inputs are actuated:

SET switch.

RES switch.

Front brake.

Rear brake.

Twist grip in "Cruise Rolloff" position.

Clutch lever is pulled in.

NOTE

The cruise enable switch is automatically tested with the cruise power indicator light. No special test mode is needed.

Diagnostic Mode Exit

The diagnostic mode is exited for any of these conditions:

Turn IGN OFF.

The cruise enable switch is turned off.

The engine is turning.

Diagnostic Tips

An intermittent may be caused by poor connection, rubbed through wire insulation or an inoperative wire inside the insulation.

Poor connection: Inspect component and harness connectors for backed out terminals, improper mating, inoperative locks,

improperly formed or damaged terminals, poor terminal-to-wire connection and damaged harnesses.The cruise control will become inoperative under the following conditions:

Engine stop switch is off.

Loss of ignition voltage.

Throttle position faults P0120 and P0220.

VSS faults P0501 and P0502.

Cruise control switch or brake switch failure P0577.

TPS correlation error P2135.

Flash memory error P0605.

Brake switch fault.

ETC limited performance mode P1510.

Cruise control set speed is too low.

Cruise control set speed is too high.

Vehicle cannot increase to cruise control set speed (uphill).

Vehicle cannot decrease to cruise control set speed (downhill).

Brake is applied.

Twist grip roll-off.

Engine has not been running long enough.

Clutch lever is pulled in.

Vehicle acceleration rate is too high.

Vehicle deceleration rate is too high.

Vehicle speed is too high.

Vehicle speed is too low.

Engine rpm is too high.

Engine rpm is too low.

Engine rpm acceleration is too high.

Transmission is first gear or in neutral.

 

Thanks for the Info pretty much everything I've done . Like I said the light does turn green but as soon as I let go of the throttle it doesn't lock . One thing I didn't notice if the green light goes off if I pull the clutch in or hit the brakes . I did the diagnostic check exactly how it should be done . Nothing turned green when I checked that includes the clutch , brakes and throttle. I'm going to ride it later to see if the green light goes out if I pull the clutch in or hit the brakes .

 

Are you saying if you don’t let go of the throttle, the cruise works?

 

No it doesn't work no matter what I do . I've used it several times so I'm familiar with how to use it . Has me baffled especially with no codes .