ford Workshop Repair Guides

Ford Workshop Service and Repair Manuals

Ignition System - Weak/No Spark|Page 1420 > < Ignition System - Weak/No Spark
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5.

Following table below, measure connector terminal voltage by attaching VOM to small straight pin inserted into connector terminal and turning
ignition switch to position shown.

CAUTION: Do not allow straight pin to contact electrical ground.

CONNECTOR

IGNITION SWITCH

TERMINAL

WIRE/CIRCUIT

TEST POSITION

#2

TO IGNITION

RUN

COIL (-) TERMINAL

#3

RUN CIRCUIT

RUN AND START

#4

START CIRCUIT

START

6.

Turn ignition switch to Off position.

7.

Remove straight pin.

8.

Reconnect wire to S terminal of starter relay.

TEST RESULT

TEST RESOLUTION

90 percent of

^ Test result OK.

battery

^ Go to Part 2, Test 6.

voltage minimum

Less than 90

^ Inspect for faults in wiring

percent of

harness and connectors.

battery

^ Refer to vehicle wiring

voltage

diagram for appropriate

circuit.

^

Damaged or worn ignition switch, Refer to Shop Manual, Group 33.

Primary Circuit Continuity

TFI-IV

Part 2

Test 8

TEST EQUIPMENT: VOM, STRAIGHT PIN

TEST PROCEDURE

1.

Separate wiring harness connector from ignition module. Inspect for dirt, corrosion, and damage.

NOTE:

PUSH connector tabs to separate.

Ignition System - Weak/No Spark|Page 1420 > < Ignition System - Weak/No Spark