I found my answer, and for archival purposes, here it is:
'90's MOPAR (Chrysler, Dodge & Plymouth domestic) Cam position and crank position or angle sensors are +5v Hall sensors.
The wiring to them is generally:
- BLACK with LIGHT BLUE stripe = ground
- TAN with YELLOW stripe OR GRAY with BLACK stripe = signal
Info from Mitchell electrical reference books at the local library.
The cam sensor I have has a pinout (left to right) of SIG / GND / +5v when looking into the sensor connector pins with the sensing (magnetic) end down.
FWIW,
David
EDIT:
More info - The cam sensor I'm testing grounds the signal wire on the approaching edge of a metal object. Any ferrous object works and does not have to be magnetic or of a particular shape. I have triggered with everything from a pair of pliers to the sharp point of an ice pick.
As long as it is within about 1/8" (3mm) of the sensor face it will trigger (rail to rail from zero to full voltage) and remain so until the trailing edge of the object passes the centerpoint of the sensor where it will shut off (stop grounding). It will also stop grounding if the object pulls directly away from the face to about 3/16" (5mm). With the sharp ice pick the switching was nearly instantaneous and would likely provide a simple spike on a scope rather than a square signal of a blunter object.
I tested with 5.2v from a Ni-cd battery and found that the sensor sinks about 200mA at that full voltage. Since a 1k pullup resistor from +5v would likely be used on the MS tach input with this device - it is more than adequate.
Oops - corrected that it sinks 200mA
NOT mV
I have a cam sensor from a 1995 Dodge Intrepid 3.5L and I need to know which wire does what. The 3 wires from left to right looking into the sensor are