28
© 2 0 0 3 d i r e c t e d e l e c t r o n i c s , i n c .
3.
Operate the door lock switch/key cylinder in both directions to
determine the resistor values. If the multimeter displays zero
resistance in one direction, no resistor is needed for that direc-
tion.
4.
Once the resistor value(s) is determined, refer to the wiring dia-
gram for proper wiring.
type H: negative (+) multiplex
The system is most commonly found in Ford, Mazda, Chrysler
and GM vehicles. The door lock switch or door key cylinder
may contain either one or two resistors.
SSIIN
NG
GL
LE
E--R
RE
ESSIISST
TO
OR
R T
TY
YP
PE
E:: If one resistor is used in the door
lock switch/key cylinder, the wire will pulse ground in one direc-
tion and resistance to ground when operated in the opposite
direction.
