ENGINE DIAGNOSTIC TEST PROCEDURES Section 6 II. ELECTRIC SHUTOFF (AUTOMATIC SHUT-OFF) A. ENGINE WILL CRANK, BUT WILL NOT START START CAUTION! Place transmission in neutral with parking brake on. IMPORTANT VERIFY ELECTRIC SHUTOFF IS INOPERABLE    AS    FOLLOWS:        OBSERVE SHUTOFF  LEVER  (1,  FIGURE  1)  AND  TURN IGNITION SWITCH TO "IGNITION" POSITION. SHUTOFF LEVER SHOULD ROTATE COUNTERCLOCKWISE (CCW) AND SOLENOID PLUNGER SHOULD MOVE DOWNWARD. IF NOT, FOLLOW PROCEDURES   1   THRU   8   TO   DETERMINE CAUSE AND REMEDY. 1. Fuse  -  Inspect  electric  shutoff  solenoid  fuse.    If burned out, replace with a 15 amp fuse.  Refer to Figure 8 for S-Series Wiring diagram and Figure 9 for Cargostar diagram. 2. 12   V   Supply   -   Check   for   12   volts   between positive  and  negative  terminals  of  solenoid  with the  15  amp  fuse  in  place.    Turn  ignition  switch key    to    "Ignition"    position.        Minimum    voltage required for solenoid to pull in is 9 volts. CAUTION! Do NOT  "jump" or bypass the fuse. Do NOT allow voltmeter negative test lead to   short   between   the   (-)   negative   and smaller  "AUX"  terminal  on  the  solenoid, if   this   occurs,   fuse   or   solenoid   failure may   result   [See   Figure   7   for   terminal location] . NOTE: "AUX" terminal is present only on early model solenoids. IMPORTANT IF   VOLTAGE   AVAILABLE   TO   SOLENOID   IS UNDER 12 V DC, CHECK BATTERY CONDITION,    WIRING    AND    CONNECTIONS, IGNITION SWITCH AND ELECTRIC SHUTOFF RELAY   (IF   APPLICABLE).      REPLACE   ANY STAR    TYPE    LOCKWASHERS    FOUND    ON SOLENOID   TERMINALS   WITH   SPLIT   TYPE LOCKWASHERS. 3. Rubber Boot - The rubber boot seals the core from dirt, water, etc. • Verify    that    boot    is    firmly    attached    to solenoid body. • Replace any boot that is torn. • Replace  any  boot  that  becomes  hard  and inflexible  in  cold  temperatures  (-1  0°F  or below)   that   may   hinder   "pull   in"   of   the solenoid plunger. 4 Solenoid Worn - Inspect as follows: • Inspect   for   evidence   of   dust,   dirt,   brass power,  or  blackened  deposits  in  solenoid core. • Inspect  for  wear  on  the  inside  diameter  of the lower portion of the return spring.  This condition will result in binding of spring coil on plunger causing slow or no plunger "pull in". NOTE: If evidence of a worn solenoid is found, as described above, solenoid condition is marginal and may not "pull in" quickly or consistently. 5. Measure resistance (ohms) across the positive and   negative   terminals   of   the   solenoid   as follows;  (refer  to  Figures  10,  11  and  Internal Switch Description.) • Turn off power supply to solenoid.  Remove plunger  and  connect  test  ohmmeter  to  (+) positive and (-) negative terminals. • With     plunger     removed,     0.2-0.3     ohms resistance should be observed. • Depress switch button in bottom of solenoid core  (using   a   clean   wooden   dowel   rod), read   ohmmeter,   18-20   ohms   resistance should be observed. CG ES-240-4 Printed in United States of America Page 17