Python 502 Owner's Manual page 65

Wiring Diagram F, One-Wire System - Cut to Lock, Ground to Unlock
This system usually requires a negative pulse to unlock and a cut wire to lock the door. (These are
reversed in some vehicles.) It is found in the late-model Nissan Sentra, some Nissan 240SX, and
Nissan 300ZX, 1992 and later. It is also found in some Mazda MPVs.
IMPORTANT! Remember that the VIOLET jumper between the #87 lock terminal and the
#87 unlock terminal must be cut.
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Directed Electronics, Inc.