Ground Circuit Continuity Test; Distributor Ground Circuit Continuity Test - Ford LSG 875 Service Manual

2-14 IGNITION SYSTEM 2-14
DIAGNOSIS AND TESTING (Continued)
TEST STEP
RESULT
ACTION TO TAKE
14 GROUND CIRCUIT CONTINUITY
.
1. Carefully insert small straight pin in module BLACK
Greater than 0.5 volt GO to 15.
wire.
CAUTION: Do not allow straight pin to contact
0.5
volt or less
electrical ground.
Replace ignition module.
2. Attach negative (-) VOM lead to distributor base.
3. Turn ignition switch to Run position.
4. Measure voltage at BLACK wire.
5. Turn ignition switch to Off position.
6. Remove straight pin.
IGNITION
l
s w r r c H
A
BALLAST
RED
RESISTOR
. I
RO
A
-
WHITE
4
' BA-lT
' GKPN o
(0
2
IGNITION
MODULE
' TACH'
GREEN
DISTRIBUTOR
NOTE:
WIRE SEQUENCE
HASBEENARRANGED
TO SIMPLIFY
SCHEMATIC.
15
DISTRIBUTOR GROUND CIRCUIT CONTINUITY
1. Separate distributor connector from harness.
Less than one ohm Test result OK.
Inspect for dirt, corrosion, and damage.
Inspect wiring harness
2. Attach one lead of VOM to distributor base.
and connectors between
3. Measure resistance by attaching other VOM lead to
distributor and ignition
BLACK wire in distributor connector.
module.
NOTE: Wiggle distributor grommet when
Greater than one ohm
measuring.
Inspect ground screw in
distributor.
4.
Reconnect distributor connector.
DISTRIBUTOR