E4 Check For Loss of Brake Input to Electronic Control Module

- Remove the harness connector from the antilock electronic control module. Check for terminal backout.

- Set voltmeter to 20 VDC range.

- Press on brake pedal hard enough to turn on rear brake lights.

- Measure voltage from harness connector Pin 11 to chassis ground while brake pedal is pressed.

- Is voltage greater than 9 volts?

YES -- Leave antilock electronic control module disconnected. Go to E5. E5 Check Power to the Antilock Electronic Control Module

NO -- Repair open in Circuit 511 (LG). Reconnect antilock electronic control module. Repeat System Pre-Check. Inspection and Verification (Start Testing Here)