Rear Window Defogger Function Test - Honda S2000 Service Manual

Rear Window Defogger
J
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Function Test
NOTE: Be careful not to scratch or damage the defogger
wires with the tester probe.
1. Check for voltage between the positive terminal (A)
and body ground with the ignition switch and
defogger switch ON.
There should be battery voltage.
. lf there is no voltage, check for:
- faulty defogger relay.
- faulty defogger change relay ('02-03 models).
- f a u l t y d i o d e ( ' 0 2 - 0 3 m o d e l s ) .
- a n o p e n i n t h e w i r e .
. lfthere is battery voltage, go to step 2.
Hardtop:
Convertible Top {'02-03 models):
A t + )
B { )
22-156
Check for continuity between the negative terminal
( B ) a n d b o d y g r o u n d .
lf there is no continuity, check for an open in the
defogger ground wire.
Touch the voltmeter positive probe to the halfway
point of each defogger wire, and the negative
probe to the negative terminal,
There should be approximately 6 V with the
ignition switch and the defogger switch ON.
. l f t h e v o l t a g e i s a s s p e c i f i e d , t h e d e f o g g e r w i r e i s
oK.
. lf the voltage is not as specified, repair the
defogger wire.
- lf it is more than 6 V, there is a break in the
negative half of the wire.
- lf it is less than 6 V, there is a break in the
positive half of the wire.