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.
Checking For Open Circuits From Relay To Motor
- Ignition off.
For window lift control rear LH door up, remove window lift relay 2/116 from relay holder. Check wire for open circuit between relay holder #1, switch 54/20 #8, and switch 3/85 #5, as described in, see OPEN-CIRCUIT, PERMANENT FAULTS . Also check wire from 3/85 #4 and #6, and motor 6/92 #1 and #2 for open circuit.
For window lift control rear LH door down, remove window lift relay 2/118 from relay holder. Check wire for open circuit between relay holder #1 switch 54/20 #6, and switch 3/85 #3, as described in, see OPEN-CIRCUIT, PERMANENT FAULTS . Also check wire from 3/85 #4 and #6, and motor 6/92 #1 and #2.
For window lift control rear RH door up, remove window lift relay 2/117 from relay holder. Check wire for open circuit between relay holder #1, switch 54/21 #8 and switch 3/86 #5, as described in, see OPEN-CIRCUIT, PERMANENT FAULTS . Also check wire from 3/86 #4 and #6, and motor 6/93 #1 and #2.
For window lift control rear RH door down, remove window lift relay 2/119 from relay holder. Check wire for open circuit between relay holder #, switch 54/21 #6, and switch 3/86 #3, as described in, see OPEN-CIRCUIT, PERMANENT FAULTS . Also check wire from 3/86 #4 and #6, and motor 6/93 #1 and #2.
For child lock, remove window lift relay 2/120 from relay holder. Check wire for open circuit between relay holder #1 switch 54/20, switch 54/21 #5, switch 3/85 and 3/86 #1, as described in, see OPEN-CIRCUIT, PERMANENT FAULTS . Also check wire from 3/85 #4 and #6, motor 6/92 #1 and #2. Also check wire from 3/86 #4 and #6, motor 6/93 #1 and #2.
Do the necessary corrective action.
If no fault is found, replace control panel, (switch unit).
Additional information:
- To access the window lift relay, see CENTRAL ELECTRONIC MODULE (CEM), REPLACING .
NO RELATED
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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.