Solenoid Ground Test; Starter Motor Cable And Ground Cable Tests - Jeep 1987 Wrangler Workshop Manual

ELECTRICAL
STARTING SYSTEM - MOTORCMR (Mtyl,
MANUAL TRANSMISSION
AUTOMATIC TRANSMISSION 84928
Solenoid Ground Test
An inadequate s o l e n o i d ground c a n be
determined with an ohmmeter.
Connect one ohmmeter test probe to the battery
negative post and the other probe to sheet metal
adjacent to the solenoid (manual transmission)
or the ground terminal (automatic transmission).
Note the resistance.
Move the test probe to the solenoid S-terminal.
Note the resistance.
If the resistance increases more than five ohms,
the solenoid has an inadequate ground.
Starter Motor Cable and Ground Cable Tests
(Voltage Drop Method)
The results of voltage drop tests will determine if
there is excessive resistance in the high current
circuit. When performing these tests, it is
important that the voltmeter test lead probes be
in contact with the terminals that the cables are
connected to instead of with the c a b l e s
t h e m s e l v e s . For e x a m p l e , when testing
between the battery and solenoid, the voltmeter
probes must touch the battery post and the
solenoid threaded stud.
Before performing the tests, e n s u r e the
following items ex% accomplished:
• disconnect and ground the Ignition coil
secondary wire
® place the transmission in NEUTRAL (manual)
or PARK (automatic) and apply the parking
brake
• ensure the battery is fully charged
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