Murphs’ CCS-100 Cruise Control

By far the most common reason an installed CCS -100 unit will not engage is because the unit senses the rear brake is being applied. If you are using LED tail lights, you must use the relay circuit mentioned in this attachment

If the cruise does not "set" when the purple wire is connected to the ground side of the brake light switch circuit, then there is a residual voltage on that line and the cruise servo will not function. Then it will be necessary to use a relay to ground the purple wire separately but supply +12 volts when the brake is applied. See the relay schematic also listed on the cruise control web page.

For a test, you can temporarily ground the purple wire to check out the operation of the cruise control. If the “set” functions properly with the purple wire grounded (be careful since it will NOT automatically disengage when the brakes are applied. With the purple wire grounded, the cruise control will only shut off by turning OFF the ON / OFF button of the control switch. The cruise control is strong enough to outpower your brakes), then you need to add a SPDT relay to the brake light circuit.

Not all SPDT relays are configured the same. Save yourself trouble and aggravation by using ours.

The following applies to a Kawasaki Concours 14, and the description of the bike parts are specific to that model. It has relevance to other bikes as well, just be sure to access the wires appropriate for your machine.

Brake Wire Connection

The purple wire from the servo shuts the servo off when the brakes are applied. This is a very critical step. Without this signal, the CCS-100 will continue to operate until you shut it off at the control pad or you crash into something.

Because we have LED brake lights we need to use a SPDT relay in the brake light circuit. Find a suitable location for the SPDT relay under the seat. Take the tools out of the tool Kit and remove the Tool Kit Box. Carefully move the ECM forward so you can access the taillight wires behind it. The tail light wires are in the black boot behind the ECM. The taillight brake wire you are looking for is Blue with a Red Stripe before the connector and solid Blue after the connector. Using Murphs’ accessory relay, make the connections according to the diagram below.


Compliments of Blayde Kennedy.