5-12
IGNITION SWITCH 5.4
Ignition Switch Testing
C297
C299
C300
The ignition switch is a 4 position switch. OFF, PRE-
HEAT, RUN and START. Turning the key counterclock-
wise will engage the PREHEAT. To activate the starter,
turn the key clockwise. When the key is released it will
return to the RUN position.
Before performing any test to the ignition switch, discon-
nect the negative or ground wire from the battery termi-
nal. Remove the 3 screws retaining the right hand dash
panel to the dash pod to access the ignition switch.
TEST 1: “RUN” POSITION.
Connect an ohmmeter across the terminals marked 30 and
ACC. (fig. C297) Turn the ignition switch to the run posi-
tion.
A low resistance reading is normal. High resistance read-
ing means you will have to replace the ignition switch.
TEST 2: “START” POSITION.
(a) Connect an ohmmeter between the terminals marked
30 and 50 on the ignition switch. (fig. C298) Turn the
ignition switch to the “START” position and observe the
ohm readings.
C298
(b) Connect the ohmmeter leads across terminals marked
30 and 17 on the ignition switch. (fig. C299) Turn the
ignition switch to the “START” position and observe the
ohmmeter reading.
Low resistance reading is normal.
High resistance reading means the ignition switch needs
replacement.
TEST 3: “HEAT” POSITION.
Connect the ohmmeter leads between the terminals
marked 30 and 19 on the ignition switch. (fig. C300) Turn
the ignition switch to the “HEAT” position and observe
the ohmmeter readings.
Low resistance reading normal.
High resistance reading, replace the ignition switch.
To Next Page
Loading...
