Electrical Clicking coming from fuse box


New Member
Apr 23, 2016
I was walking through my garage just now and as I walk past my car I hear a repetitive clicking noise. I opened the door and the noise stopped so I got in the car and closed the door. After about 30 seconds it started clicking again and again. I believe I’ve narrowed the noise down to the fuse box. I pulled the #8 fuse and it didn’t stop but as soon as I put it back in it quit and didn’t do it again. I believe I found the reason why my battery slowly drains. Any ideas?
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StangNet's favorite TOOL
SN Certified Technician
Mar 10, 2000
Dublin GA
That's probably the sound of a circuit breaker tripping open and the resetting

See fuse panel slot #2 and #14 on the diagram below.

The following are diagrams courtesy of Tmoss & Stang&2birds

Fuse box layout

See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host) for help on 88-95 wiring; http://www.veryuseful.com/mustang/tech/engine/ Everyone should bookmark this site.[/b]

TFI module wiring for 94-95 Mustang GT

Complete computer, actuator & sensor wiring diagram for 94-95 Mustangs

Complete computer, actuator & sensor wiring diagram for 91-93 Mass Air Mustangs

Complete computer, actuator & sensor wiring diagram for 88-90 Mass Air Mustangs

5.0 wiring diagram for Fuel Injectors, Sensors, and Actuators

Main body EFI wiring harness

Ignition switch wiring

O2 sensor wiring harness

Vacuum diagram 89-93 Mustangs

HVAC vacuum diagram

TFI module differences & pin out

Fuse box layout

Mustang 5.0 Lights and Radio schematic, by TMoss:

87-92 power window wiring

93 power window wiring

T5 Cutaway showing T5 internal parts

Visual comparison of the Ford Fuel Injectors, picture by TMoss:

Convertible top motor wiring http://www.veryuseful.com/mustang/tech/engine/images/mustang88VertTopMotorCkt.gif

Engine mounted fuel injector harness

Location of the TPS, IAB, and the 10-pin connectors on a 5.0, picture by TMoss:

Starter circuit

Alternator diagram for 94-95 Mustangs.