Red and Green Dim

The intensity of the green and red LEDs indicates the integrity of the DLC grounds and power circuits.

Both green and red LEDs off

Check vehicle fuse to DLC pin 16.

One green LED is dim and the red LED is bright

Check the wire and connections for the associated circuit. For example, if LED 4 is dim then check the connections and wire integrity of the vehicle chassis ground – DLC pin4.

Both green LEDs and the red LED is dim

Check the battery voltage charge and the vehicle wire and connections for DLC pin 16.

One green LED goes dim when scan tool is connected

The scan tool using the DLC for power and ground. Connecting the scan tool loads the power and ground. A voltage drop results due to resistance somewhere in the vehicle power and ground circuit causing the LED to dim.

Check the wire and connections for the associated circuit. For example, if LED 4 is dim then check the connections and wire integrity of the vehicle chassis ground – DLC pin4.

Both green and the red LED goes dim when scan tool is connected

The scan tool using the DLC for power and ground. Connecting the scan tool loads the power and ground. A voltage drop results due to resistance somewhere in the vehicle power and ground circuit. Since the scan tools usually use either pin 4 (chassis ground) or pin 5 (signal ground) and usually not both. Therefore, if all LEDs go dim chances are there is a resistance problem in the vehicle circuit for pin 16 - the power.

Red LED is flashing

Check the vehicle fuse to pin 16. On older version of the LineSpi it is possible for a dataline that has voltage to feedback through the LineSpi circuit and cause the Red LED to light up.

Red LED is on while green LEDs are off and one yellow LED is on

This is a unique situation that is caused by vehicle circuits 4 and 5 both open. If they are both open, the older LineSpi may have feed back from pin 16 out of a data line that is grounded.