Checking the Power Supply

Checking The Power Supply







- Ignition on.

Check the power supply to the stop lamp switch.

Take readings between stop lamp switch terminal #1 (wiring side) and the ground terminal. The power supply must be approximately 12 V.

If there is no power supply:
Check the power supply circuit for stop lamp switch terminal #1 (wiring side). Check for an open-circuit. Check for a short-circuit to ground.

Check for a blown fuse in the circuit.

Remedy as necessary.

Other information:
- Checking wiring and terminals
- For further information about the fuses and relays, see the Wiring Diagram
- To connect the breakout box, see Connecting the breakout box
- For information about signals on 5 cylinder engines, see Signal specification
- For information about signals on 6 cylinder engines, see Signal specification
- To access and replace the stop lamp switch, see Stop lamp switch, replacing.

Continue with Test.