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N415A
Connecting door lock inputs in vehicles with driver’s door unlock and external relays:
This system is used in many four-door GM sedans. To test for this type of system, probe the unlock wire from the
interior switch (black or white). Unlock the driver’s door, by itself, using the factory remote. If the switch wire
shows (+) 12V, then use the following diagram:
Note: It is often easy to access the passenger unlock wire going to the rear door motor on the driver’s
side.
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