Symptom:
BACKU P LAMP CKT S HORT TO VOLTAGE OR OP EN
POSSIBLE CAUSES
BACKUP LAMP CIRCUIT OP E N
BACKUP LAMP CIRCUIT SH ORT TO VOLTAGE
SH IF T LEVE R ASSE MBLY
TE S T ACTION AP PLICAB ILITY
1Starttheengine.
Wh ile back pr obin g, m ea su re t h e volta ge of th e Ba ck up La m p cir cu it.
Is t h e volt a ge above 0.5 volt s?
All
Ye s → Go To 2
No → Go To 3
2 Tur n th e ign it ion off t o t h e lock posit ion .
Discon n ect t he Sh ift Lever Assem bly h a r n ess con n ect or.
Star t t he engine.
Mea su r e t h e volt a ge of t h e Ba cku p La m p cir cuit in th e Sh ift Lever Assem bly h a r n ess
conn ect or.
Is t h e volt a ge above 0.5 volt s?
All
Ye s → Repa ir t h e Ba ck up La m p circu it for a sh or t to volt a ge.
No → Repla ce th e Sh ift Lever Assem bly per t h e Ser vice In for m a t ion .
3 Tur n th e ign it ion off t o t h e lock posit ion .
Discon n ect t he Sh ift Lever Assem bly h a r n ess con n ect or.
Rem ove t h e Ba cku p La mp bu lb(s).
Con n ect a ju m per wir e bet ween Sh ift Lever Assembly cir cu it a n d B(+).
Usin g a 12-volt t est ligh t conn ect ed t o 12-volt s, ch eck t h e Ba ck u p La m p cir cu it in t h e
Ba ck u p La m p socket (s).
NOTE: Th e t e s t lig h t m u s t illu m in a t e b rig h tly. Co m p are th e brig h tn e ss to
th a t of a dire c t co n n e cti o n to th e ba tte ry.
Does t h e test ligh t illu min a t e br igh t ly?
All
Ye s → Repla ce th e Sh ift Lever Assem bly per th e Ser vice In for m a t ion .
No → Repa ir th e Ba cku p La m p cir cu it for an open .
15
SH I FT LEV ER ASSEM BLY