SERVICE MANUAL NUMBER 23
INSTRUMENTATION
Switches
Ignition Key Switch
TESTING
CAUTION
Disconnect battery cables from battery before testing ignition key switch with wires
still connected to switch.
1.
Disconnect battery cables, if testing ignition key switch with wires connected to switch.
2.
Before testing key switch, check all fuses and/or circuit breakers in electrical circuit
which could prevent operation of starter.
3.
4.
With key switch in OFF position, there should be no continuity between switch terminals.
With key switch in RUN position, continuity will exist between switch terminals B to I.
There should no continuity between terminal S and any other terminals.
5.
6.
With key switch in START, continuity will exist between terminals B to I and B to S.
Terminals are to make contact at angles shown and to stay in contact condition as switch
is rotated toward START.
7.
If ignition key switch tests bad, disconnect wire connections and remove switch. Test
switch again, as in Steps 2-5, preceding. If switch tests good, wiring in harness is bad.
There should be no continuity between any harness wires with key switch removed.
f
e
d
c
b
a
B
S
I
72760
Key View
Back View
a - Key
b - Off
c - Continuity, B to I Terminals
d - Run
e - Continuity B to S Terminals
f - Start
90-861326--1
MARCH 1999
Page 4D-15
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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Marine readers have rated Mercury MerCruiser GM V8 GM V8 454 CID 7.4L and 502 cid 8.2L Marine Engines Service Manual Number 23 5.0 out of 5.0 based on 1 product reviews. Just need the manual. Wrote review. Can't technically review what I haven't seen yet...