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Car Security and Convenience / Power Door Locks, Single Wire Systems |
With many it's as simple as measuring the resistance of the wire(s) during
lock and unlock to determine the value of the needed resistor(s). Others will
require the addition of relays and / or diodes.
Nissan's Single Wire '91-'95 using 1 relay and 1 diode (Type F door lock) |
On the '91-'95 300ZX and the '92-'95 240SX, locate the lock/unlock wire in the driver's
kick panel or door jamb. When this wire is cut, or opened, the doors will lock. When this wire is
grounded. the doors will unlock. If you have positive door lock outputs read next.
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Nissan's Single Wire '91-'95 using 2 relays (Type F door lock) |
On the '91-'95 300ZX and the '92-'95 240SX, locate the lock/unlock wire in the driver's
kick panel or door jamb. When this wire is cut, or opened, the doors will lock. When this wire is
grounded. the doors will unlock. If you have positive door lock outputs from the alarm or keyless
entry, connect the sides of the coils shown connected to (+)12 VDC to ground and the positive
door lock outputs to the respective terminals of the relays.
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Ford Probe |
Locate the single wire from the switch. When (+) 12 VDC is applied to this wire the doors
will lock. When (+) 12 VDC is applied through a 4.7 K ohm resistor, the doors will unlock. If your alarm
or keyless entry has positive outputs, connect the resistor in series to the lock output wire with a diode
and another diode to the unlock output with the cathodes of each towards the single lock/unlock wire.
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Dodge Caravan (1996 - 2000) |
Locate the white w/green wire in the harness under the body control module. When ground
is applied to this wire through a 1.5 K ohm resistor the doors will lock. When ground is applied to this wire
through a 249 ohm resistor the doors will unlock.
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Dodge Caravan (2001 - 2005) |
Locate the purple/green wire in connector 3, pin 21 at the body control module. When ground
is applied to this wire through a 5.3 K ohm resistor the doors will lock. When ground is applied to this wire
through a 2 K ohm resistor the doors will unlock.
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