1. Ignition in ACC.
2. Wiper switch in LO.
3. Probe the GRA (91) wire at the wiper switch using a grounded test lamp.

Does the test lamp illuminate?

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Go to Step 3

Go to Step 2

Replace the wiper/washer switch.

Is the repair complete?

--

System OK

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1. Ignition OFF.
2. Check for an open GRA (91) wire between the wiper switch and the wiper motor module.

Is there an open circuit?

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Go to Step 4

Go to Step 5

Repair the open circuit between the switch and the motor module.

Is the repair complete?

--

System OK

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Replace the wiper motor module.

Is the repair complete?

--

System OK

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