Ignition Circuit Test Points - Sabre 1338 Gear Technical Manual

DIAGNOSTICS

IGNITION CIRCUIT TEST POINTS

When diagnosing an ignition problem, isolate magneto circuit from ground circuit by separating engine connector. If
engine will not start check magneto circuit first and then check ground circuit. If engine will not shut off, check
ground circuit. Remember engine is stopped by grounding ignition coil through either key switch, seat switch or the
brake switch and PTO switch.
Test Conditions:
• Ignition switch in run position
• Meter positive (+) lead on
numbered test point
Test/Check Point
1. Engine connector 940 white
wire (wiring harness side of
connector)
Test Conditions:
• Park brake disengaged
Test/Check Point
2. Engine connector 940 white
wire
Test Conditions:
• Key switch in off position
Test/Check Point
3. Engine connector 940 white
wire
4 - 14
www.servicemanualall.com
• Park Brake engaged
• Meter negative (—) lead on
engine ground
Normal
Infinite resistance
Infinite resistance
Infinite resistance
Infinite resistance
• Seat switch depressed
Normal
Infinite resistance
• Seat switch released
Normal
Maximum 0.1 ohms
ELECTRICAL
• Blade Drive Lever disengaged
• Engine connector disconnected
If Not Normal
Check that blade drive switch
plunger is being fully depressed by
blade drive lever
Check that brake switch is being
fully depressed by brake arm
Check for shorted 940, 941, 942,
white wires to chassis
Check for faulty ignition switch
(internal short)
If Not Normal
Check for shorted 945/946 white/
black wires
Check for faulty seat switch
• Brake switch released
If Not Normal
Check for open 940/941/942 white
wires
Check for open 100/110 black wires
3/5/97