Test 1

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.

Ignition/Vehicle & All vehicle systems - Off
NOTE: It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.
Disconnect the appropriate electrical connector: M74D Window Motor - Driver
Test for less than 10 Ω between the test points: Ground circuit terminal 1 & Ground
- If 10 Ω or greater
1. Ground Connection - Disconnect
2. Test for less than 2 Ω between the test points: Ground circuit terminal 1 @ Component harness & Ground Connection
  - If 2 Ω or greater - Repair the open/high resistance in the circuit.
  - If less than 2 Ω - Repair the open/high resistance in the ground connection.
- If less than 10 Ω
Ignition - On / Vehicle - In Service Mode
Verify a test lamp turns On between the test points: B+ circuit terminal 2 & Ground
- If the test lamp does not turn On and the circuit fuse is OK
1. Ignition/Vehicle - Off & Remove - Test lamp
2. Test for less than 2 Ω between the test points: B+ circuit terminal 2 @ Output terminal & Fuse
  - If 2 Ω or greater - Repair the open/high resistance in the circuit.
  - If less than 2 Ω - Verify the fuse is OK and there is voltage at the fuse.
- If the test lamp does not turn On and the circuit fuse is open
1. Ignition/Vehicle - Off & Remove - Test lamp
2. Test for infinite resistance between the test points: B+ circuit terminal 2 & Ground
  - If less than infinite resistance - Repair the short to ground on the circuit.
  - If infinite resistance - Replace the component:
- M74D Window Motor - Driver
- M74P Window Motor - Passenger
- If the test lamp turns On
Test or replace the component: M74D Window Motor - Driver