Fuse/Relay
Location
Fuse Amp
Rating
Protected Circuits
40
15A**
PCM vehicle power 4 – ignition
coil
41
G8VA relay
Fuel pump relay
42
G8VA relay
Intercooler pump relay (Shelby
only)
43
G8VA relay
A/C compressor relay
44
—
Not used (spare)
45
5A**
PCM run/start
46
5A**
PCM vehicle power 3 – general
powertrain components
47
15A**
PCM vehicle power 1
48
15A**
Mass air flow sensor
49
15A**
PCM vehicle power 2 – emissions
related powertrain components
50
Full ISO relay
Cooling fan relay (high)
51
Full ISO relay
Blower motor relay
52
Full ISO relay
Starter relay
53
Full ISO relay
Rear defroster relay
54
Full ISO relay
Front wiper relay
55
Full ISO relay
Cooling fan relay (low)
56
High current
relay
Fuel pump sensor (Shelby only)
57
Full ISO relay
PCM relay
58
High current
relay
Not used (Spare)
* Cartridge Fuses ** Mini Fuses
Auxiliary relay with heated seats (if equipped)
On heated seat equipped vehicles, there is a relay box located under the
driver seat containing two relays for the driver and passenger heated
seats.
Roadside Emergencies
238
2012 05+ Mustang
(197)
Owners Guide, 1st Printing
USA
(fus)