Chrysler 300M 1999 Manual page 601

TEST 7A
REPAIRING ALL DOORS FAILING TO UNLOCK FROM ANY SWITCH
Perform TEST 1A Before Proceeding
START TEST 7A.
WITH A VOLTMETER,
MEASURE BOTH FUSED
B (+) CIRCUITS.
FIG. 1
REMOVE THE DOOR
LOCK RELAY AND THE
LF DOOR UNLOCK
RELAY.
FIGS. 2 & 3
CONNECT A TEST LIGHT
BETWEEN CAVITIES 78
& 80 OF THE DOOR
UNLOCK RELAY CONN.
FIG. 1
STOP THE
ACTUATION.
WITH AN OHMMETER,
MEASURE RESISTANCE
BETWEEN TERMINALS
30 AND 87A OF THE
LOCK RELAY. FIG. 4
*Perform Verification TEST VER-2A.
REMOVE THE DOOR
UNLOCK RELAY.
FIG. 1
USING AN OHMMETER,
MEASURE BETWEEN
GROUND AND THE
UNLOCK RELAY OUTPUT
CKT (CAV 76). FIG. 1
WITH THE DRB,
ACTUATE THE DOOR
UNLOCK RELAY AND
OBSERVE THE TEST
LIGHT.
USING AN OHMMETER,
MEASURE BETWEEN
GROUND AND CAVITY
84 OF THE LOCK
RELAY CONN. FIG. 2
**Check connectors - Clean / repair as necessary.
591
IS THE VOLTAGE NO
ABOVE 10.0 VOLTS
ON BOTH CIRCUITS?
YES
IS THE RESISTANCE YES
BELOW 5.0 OHMS?
NO
DOES THE TEST
LIGHT FLASH ON AND NO
OFF WHEN THE RELAY
IS ACTUATED?
YES
IS THE RESISTANCE NO
BELOW 5.0 OHMS?
YES
IS THE RESISTANCE NO
BELOW 5.0 OHMS?
YES
REPLACE THE
JUNCTION BLOCK.*
REPAIR THE LOCK OR
UNLOCK RELAY OUTPUT
CIRCUIT FOR A SHORT
TO GROUND. IF OK,
REPLACE THE J/B.*
CONTINUE TEST
7A ON THE NEXT
PAGE.
REPLACE THE
JUNCTION BLOCK.*
REPLACE THE LOCK
RELAY.*
REPLACE THE UNLOCK
RELAY.*
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