Headlamp Diagnosis - Chrysler 1998 Viper RT/10 Owner's Manual

8L - 2 LAMPS
S R
D I A G N O S I S A N D T E S T I N G
HEADLAMP DIAGNOSIS
Viper vehicles b u i l t for Canada export are
equipped w i t h a D a y t i m e R u n n i n g L a m p ( D R L ) sys-
tem. The D R L system operates the headlamps at
50% i l l u m i n a t i o n w i t h the headlamp switch O F F and
the engine r u n n i n g . The D R L system is controlled by
the D a y t i m e R u n n i n g L a m p Module located on the
inside of the r i g h t front upper frame r a i l above the
stabilizer bar. The D R L module overrides the head-
lamp switch w h e n the headlamps are t u r n e d OFF.
The headlamps operate n o r m a l l y w h e n the head-
lamps are t u r n e d O N .
W h e n a vehicle experiences problems w i t h the
headlamp system, verify the condition of the battery
connections, charging system, headlamp bulbs, w i r e
connectors, relay, h i g h beam d i m m e r switch and
headlamp switch. Refer to Group 8W, W i r i n g Dia-
grams, for component locations and circuit informa-
t i o n .
HEADLAMP DIAGNOSIS
C O N D I T I O N P O S S I B L E C A U S E S C O R R E C T I O N
H E A D L A M P S A R E DIM
W I T H E N G I N E IDLING O R
IGNITION T U R N E D O F F
1. L o o s e o r c o r r o d e d battery c a b l e s .
2. L o o s e o r w o r n g e n e r a t o r drive
belt.
3. C h a r g i n g s y s t e m o u t p u t too low.
4. Battery has insufficient c h a r g e .
5. Battery is sulfated or s h o r t e d .
6. Poor lighting circuit Z 1 - g r o u n d .
7. Both h e a d l a m p bulbs defective.
1. C l e a n a n d s e c u r e battery cable c l a m p s
a n d posts.
2. Adjust o r replace generator drive belt.
3. Test a n d repair c h a r g i n g s y s t e m . Refer t o
G r o u p 8 A ,
4 . Test battery state-of -charge. Refer to
G r o u p 8 A .
5. L o a d test battery. Refer to G r o u p 8 A .
6. Test f o r v o l t a g e drop across Z 1 - g r o u n d
locations. Refer to G r o u p 8W.
7. R e p l a c e both h e a d l a m p bulbs.
H E A D L A M P B U L B S B U R N
O U T F R E Q U E N T L Y
1. C h a r g i n g s y s t e m o u t p u t too high.
2. Loose or c o r r o d e d terminals or
splices in circuit.
1. Test a n d repair charging s y s t e m . Refer to
G r o u p 8 A .
2. Inspect a n d repair all c o n n e c t o r s a n d
splices. Refer to G r o u p 8W.
H E A D L A M P S A R E D I M
W I T H E N G I N E R U N N I N G
A B O V E I D L E
1. C h a r g i n g s y s t e m output too low.
2 . Poor lighting circuit Z 1 - g r o u n d .
3. High resistance in h e a d l a m p
circuit.
4 . Both h e a d l a m p bulbs defective.
1. Test a n d repair charging s y s t e m . Refer to
G r o u p 8 A .
2. Test for voltage drop across Z 1 - g r o u n d
locations. Refer to G r o u p 8W.
3. Test a m p e r a g e d r a w of h e a d l a m p circuit.
4. R e p l a c e both h e a d l a m p bulbs.
H E A D L A M P S F L A S H
R A N D O M L Y
1. Poor lighting circuit Z 1 - g r o u n d .
2. High resistance in h e a d l a m p
circuit.
3. Faulty h e a d l a m p s switch circuit
breaker.
4. L o o s e o r c o r r o d e d terminals or
splices in circuit.
1. Test for voltage drop across Z 1 - g r o u n d
locations. Refer to G r o u p 8W.
2. Test a m p e r a g e draw of h e a d l a m p circuit.
3. Replace h e a d l a m p switch.
4 . Inspect a n d repair all c o n n e c t o r s a n d
splices. Refer t o G r o u p 8W.
H E A D L A M P S D O N O T
I L L U M I N A T E
1. N o voltage t o h e a d l a m p s .
2 . N o Z 1 - g r o u n d at h e a d l a m p s .
3. Faulty h e a d l a m p s w i t c h .
4. Faulty headlamp dimmer
(multi-function) s w i t c h .
5. B r o k e n c o n n e c t o r terminal or wire
splice in h e a d l a m p circuit.
1. Repair o p e n headlamp circuit. Refer t o
G r o u p 8 W .
2. Repair circuit g r o u n d . Refer t o G r o u p
8W.
3. Replace h e a d l a m p switch.
4. Replace multi-function switch.
5. Repair connector terminal or wire splice.