MAMUSTANG ATLASTHE ENTHUSIAST'S REFERENCE
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2016 workshop · Engine

Starting System

303-06C Starting System - 5.0L

2016 Mustang5.0LReference 675 / 6,619HTML edition
← Chapter contentsProcedure contents

Positive Lead

Measurement /

Action

Negative Lead

BJB starter relay pin 1

Starting System — original illustration 1, reference 675Original colors & callouts · Select to enlarge

BJB starter relay pin 2

Starting System — original illustration 2, reference 675Original colors & callouts · Select to enlarge

Make sure the transmission is in PARK or NEUTRAL. While pressing the engine start/stop switch and the brake pedal, observe the test light.

Does the test light illuminate when the engine start/stop switch is pressed?

Yes

GO to A14

No

GO to A21

A14 CHECK THE VOLTAGE TO THE STARTER RELAY

Measure:

Positive Lead Measurement / Action Negative Lead Ground BJB starter relay pin 3

Original table alignment retained · Scroll horizontally if needed

Starting System — original illustration 3, reference 675Original colors & callouts · Select to enlarge

Is the voltage greater than 11 volts?

Yes

GO to A15

No

VERIFY BJB fuse 30 (30A) is OK. If OK, REPAIR the circuit for an open. If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.

A15 CHECK THE STARTER MOTOR OPERATION AT THE STARTER RELAY

Ignition OFF. With the transmission in PARK or NEUTRAL, momentarily connect a fused jumper wire:

Positive Lead

Measurement /

Action

Negative Lead

Source reference 675

2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.