Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Circuit/System Testing
- Ignition/Vehicle OFF, disconnect the X1 harness connector at the K43 Power Steering Control Module.
- Verity a test lamp illuminates between ground circuit terminal 2 and B+.
- If the test lamp does not illuminate
- Repair the open/high resistance on the circuit or ground connection.
- Go to next step: If the test lamp illuminates
- Verify a test lamp illuminates between the B+ circuit terminal 1 and ground.
- If the test lamp does not illuminate and the circuit fuse is OK
- Test the circuit for an open/high resistance:
- If an open/high resistance is found, repair the fault on the circuit.
- Go to next step: If an open/high resistance is not found
- Verify there is voltage at the fuse.
- If the test lamp does not illuminate and the circuit fuse is OPEN
- Test the circuit for a short to ground:
- If a short to ground is found, repair the fault on the circuit.
- Go to next step: If a short to ground is not found
- Replace the Steering Gear.
- Go to next step: If the test lamp illuminates
- Replace the Steering Gear.
This ground circuit is capable of carrying significant current. Testing using a DMM or test lamp is sufficient to determine continuity of the circuit and ground but a voltage drop test may be appropriate if vehicle symptoms indicate circuit integrity, ground integrity, or the current carrying capability of the circuit are in question. Refer to Measuring Voltage Drop , and Testing Ground and Low Reference Circuits for instructions on measuring voltage drop. Overall voltage drop should be less than 1 V.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.