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Old 05-20-2011, 10:26 PM
crdnblu crdnblu is offline
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Gm Column & Volvo Wiper Unit

First, I would suggest that you verify how your existing Volvo wipers work; do they operate off of a switched 12V signal, or by switching ground? If my fuzzy memory serves me correctly, the GM column wiper stalk switches "ground".
Depending on the existing Volvo setup research, if they work off of 12V switched, you'll need voltage switching relay(s) in the circuit(s). Check out this Bosch link, to find what you might need:
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