Product Support - Power On/Off Troubleshooting

Here are some solutions that have helped many of our customers.

Check the Fuse
If your unit will not power up, please check the fuse.  It will be located in a fuse-holder attached to the red wire on the power cable. If the fuse has blown, replace it with a fuse that is the same value. If the unit is wired to a fuse panel, check the fuse in the panel. 

Debris in the Keyboard Contacts
In case there is dirt or other debris covering the contacts inside the keypad, press down on the button in question and wiggle it to try to restore its function.

Inspect the Connections
Make sure the power cable connector is seated securely in the connector on the unit. Make sure that the cable connections to the power source are not loose or disconnected.  

Clean the Connections
Corrosion or oxidation could occur on the power cable connector pins and fuse-holder. This can prevent sufficient power from flowing to the unit. Clean the connections to be sure. Sometimes the substance is clear and not easily seen.

Verify the Presence of Voltage
Using a volt-meter, verify that your power source is outputting 12 volts. Then use the volt-meter to verify that the same amount of power is coming through the cable connector that plugs into the unit (see some of the most common power cable pin diagrams below).

HDS Units - PC-30	LCX/LMS Blue Conn. Units - PC-27
LCX/LMS New Gray Conn. - PC-25X	Uni-Plug - HST-WSU

Rechargeable Batteries
If your unit has rechargeable batteries, try charging them overnight to give them ample time to charge.

Cigarette Lighter Adapter Cable
Check the fuse in the power cable for a blown fuse.

If you have reviewed the troubleshooting information above and still believe that you need additional assistance, please choose one of the following options:

If you need to speak with a Customer Service agent, please call our toll-free Customer Service line at 1-800-324-1356. Technicians and representatives are available to help you Monday through Friday from 8 a.m. to 5 p.m. CST, except holidays.