Jeep 1996 Grand Cherokee Service Manual - page 379
DAYTIME RUNNING LAMP DIAGNOSIS
DAYTIME RUNNING LAMP DIAGNOSIS
CONDITION
POSSIBLE CAUSES
CORRECTION
DAYTIME RUNNING LAMPS DO
NOT WORK
1. Poor connection at DRL module.
2. Parking brake engaged.
3. Parking brake circuit shorted to
ground.
4.
Headlamp
circuit
shorted
to
ground.
5. Defective DRL module.
1. Secure connector on DRL module.
2. Disengage parking brake.
3. Check voltage on pin 3 of module,
refer to Group 8W.
4. Check L3 circuit, refer to Group 8W.
5. Replace DRL module.
LAMP OUTAGE MODULE DIAGNOSIS
NOTE: The Lamp Outage Module contains an inter-
nal circuit breaker. When the module senses an
overload it will trip the circuit breaker and illumi-
nate a failure in the Vehicle Information Center
(VIC). The circuit breaker will reset once the vehicle
is turned off for approximately 60 seconds. Contin-
uous tripping of the circuit breaker may indicate a
circuit problem.
8L - 4
LAMPS
ZJ
DIAGNOSIS AND TESTING (Continued)