Honda S2000 Service Manual page 942

Dash Lights Brightness Gontroller
1
1
Controller Input Test (cont'dl
3. Reconnect the connectors to the gauge assembly.
4. Back probe the connector and make these input tests.
. l f a n y t e s t i n d i c a t e s a p r o b l e m , f i n d a n d c o r r e c t t h e c a u s e , t h e n r e c h e c k t h e s y s t e m .
. l f a l l t h e i n p u t t e s t s p r o v e O K , t h e c o n t r o l l e r s w i t c h b o a r d o r t h e m a i n p r i n t e d c i r c u i t b o a r d i n t h e g a u g e
assembly must be faulty; replace it.
Cavitv Wire
Test condition
Test: Desired result Possible cause if result is not obtained
B3 RED/BLK
C o m b i n a t i o n
light switch
ON {)00!) or
Check for voltage to ground:
There should be battery voltage.
B l o w n N o . 2 3 { 1 0 A ) f u s e i n t h e
under-dash fuse/relay box
F a u l t y t a i l l i g h t r e l a y
Faulty combination light switch
P o o r g r o u n d { G 4 0 1 )
A n o D e n i n t h e w i r e
B 4 YEL
lgnition switch
o N ( I )
Check for voltage to ground:
There should be battery voltage.
B l o w n N o . 5 ( 7 . 5 A ) f u s e i n t h e
underdash fuse/relay box
An open in the wire
B 5 WHT/RED U n d e r a l l
conditions
Check for voltage to ground:
There should be battery voltage.
. B l o w n N o . 2 5 ( 7 . 5 A ) f u s e i n t h e
under-dash fuse/relay box
. A n o o e n i n t h e w i r e
B 8
BLK
U n d e r a l l
conditions
Check for voltage to ground:
There should be less than 1 V.
P o o r g r o u n d ( G 5 0 1 )
A n o D e n i n t h e w i r e
B 9 BLK
U n d e r a l l
conditions
Check for voltage to ground:
There should be less than 1 V.
P o o r g r o u n d ( G 5 0 1 )
A n o o e n i n t h e w i r e
8 1 0 RED
Combination
light switch
ON (i001) or
Connect to ground:
D a s h l i g h t s s h o u l d c o m e o n f u l l
bright.
A n o p e n i n t h e w i r e
22-86
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