What fuse controls the ignition?

Depending on make & year, most later models have a high amperage fuse in the main fuse box in the engine compartment . Usually this fuse is labeled ignition. Or you can pull the fuel pump fuse. You can look at the owners manual to identify the fuse or look at the fuse box cover to see proper fuse.

Where are the cabin fuses located?

Most vehicles have two fuse boxes, with one under the hood and the other in the cabin . You can usually find the other fuse box in the dashboard on the driver's side, but some manufacturers also place it below the glove box. If the interior fuse box isn't there, you can try checking the luggage compartment.

Where is the interior fuse box on a 2018 f250?

The fuse panel is in the right-hand side of the passenger footwell behind a trim panel . To remove the trim panel, pull it toward you and swing it away from the side.

Where is my main fuse?

The first thing to do is find your main fuse box (these days called a consumer unit), which will be in the same place as your electricity meter. They're often in the main hallway of a house, in a purpose-built cupboard .

Where is the instrument panel fuse box?

You can usually find the fuse box under the hood or in the cabin of your car . Once you've found it, look at the fuse diagram and see which fuses are labeled Instrument Panel or Dashboard. Once you know which one is blown, replace it with one that has a similar amperage rating.

Where is the passenger side fuse box?

Engine fuse boxes are typically situated near the battery . In this vehicle, the battery is on the driver's side, and there is a fuse box right above it with a black plastic cover to protect the fuses. On the passenger side, there is also a battery, and the fuse box is located nearby.

Can a blown fuse cause a car not to start?

Blown fuse – Sometimes the simplest explanation is the best one. A blown fuse in the starter circuit could be the cause of a no-start problem . Broken or corroded wiring – Damaged or dirty wires to the battery or to the starter solenoid (or wires that are loose) can prevent sufficient power from reaching the starter.

Can a fuse be bad but not blown?

Sometimes a fuse is bad but not necessarily blown . In this case, the best way to test it is with a test light or a multimeter. These are both relatively inexpensive tools and provide an easy way of checking if there's a current running through the fuse.

What are the symptoms of a blown fuse?

The most sure sign you have a blown fuse is if your electrical system stops working . Lights, power windows, windshield wipes, locks, and turn signals all rely on electricity. If the flow of electricity has stopped due to a blown fuse, one or several of these features won't be working properly.

How do I know if I have a bad ignition fuse?

If nothing happens when you turn the key to the start position , the ignition relay might be to blame. This may be caused by a worn-out electromagnet inside the relay or by corroded contacts that prevent current from flowing. You might also hear a click from the ignition relay when you turn the ignition switch.

Why won t my f150 ignition turn?

The most common reasons a Ford F-150 key won't turn are a binding steering column/lock, an ignition switch issue, or a problem with the ignition key .

How do you check an ignition fuse?

Inspect the metal strip on the fuse to see if it's damaged . If it is visibly burnt up and damaged, the fuse needs to be replaced. If it looks okay, test the pins with a multimeter. If you get a resistance of 50-120 ohms (Ω), the fuse is fine. If it's too low or high, the ignition relay fuse needs to be replaced.

2018 Ford F-150 fuse box diagram

This F-150 has 2 different fuse boxes:

Power Distribution Box diagramPassenger Compartment Fuse Panel diagram

Type	No.	Description
Fuse MICRO2 25A	1	Horn
Fuse FMM/MCase 50A	2	Electric fan 1.
Fuse FMM/MCase 30A	3	Windshield wiper motor.
Fuse FMM/MCase 60A	4	Body control module.
Fuse FMM/MCase 30A	5	Starter relay.
Fuse FMM/MCase 20A	6	Power point 1.
Fuse FMM/MCase 20A	8	Power point 2
Fuse MICRO2 5A	10	Rain sensor.
Fuse FMM/MCase 15A	12	Upfitter 1 relay [Raptor]
Fuse MICRO2 10A	13	4x4 run/start. Adaptive cruise control run/start module.
Fuse MICRO2 15A	14	Spare
Fuse MICRO2 7.5A	15	Front view camera. Voltage quality module.
Fuse MICRO2 15A	15	Spare [Raptor]
Fuse MICRO2 10A	16	Powertrain control module, Transmission control module run/start.
Fuse MICRO2 10A	17	Anti-lock brakes run/start.
Fuse MICRO2 10A	18	Electric power steering run/start.
Fuse MICRO2 5A	19	Upfitter 5 relay [Raptor]
Fuse FMM/MCase 40A	20	Blower motor.
Fuse FMM/MCase 30A	21	Passenger seat motors.
Fuse MICRO2 20A	22	Radio amplifier
Fuse MICRO2 10A	23	Alt A sensor.
Fuse FMM/MCase 30A	24	Trailer brake control module.
Fuse FMM/MCase 50A	25	Body control module 1.
Fuse FMM/MCase 50A	26	Electric fan [Gas]
Fuse FMM/MCase 30A	27	Driver seat motors/memory module.
Fuse MICRO2 15A	28	Heated seat.
Fuse MICRO2 10A	29	4x4 solenoid.
Fuse FMM/MCase 25A	30	Trailer tow battery charge.
Fuse MICRO2 10A	32	A/C clutch.
Fuse MICRO2 10A	34	Vehicle power 5 [Diesel]
Fuse MICRO2 20A	35	Vehicle power 4 [Gas]
Fuse MICRO2 15A	35	Vehicle power 4 [Diesel]
Fuse MICRO2 10A	36	Vehicle power 3.
Fuse MICRO2 25A	37	Vehicle power 2 [Gas]
Fuse MICRO2 15A	37	Vehicle power 2 [Diesel]
Fuse MICRO2 25A	38	Vehicle power 1 [Gas]
Fuse MICRO2 20A	38	Vehicle power 1 [Diesel]
Fuse FMM/MCase 30A	41	Body-control-module voltage-quality-module feed.
Fuse FMM/MCase 20A	43	Trailer tow lamps module
Fuse MICRO2 10A	46	Steering-column lock.
Fuse FMM/MCase 50A	47	Powertrain control heater 3 [Diesel]
Fuse FMM/MCase 30A	48	Fuel filter heater [Diesel]
Fuse FMM/MCase 30A	50	Fuel pump.
Fuse FMM/MCase 20A	51	Power point 3.
Fuse FMM/MCase 50A	52	Powertrain control heater 2 [Diesel]
Fuse FMM/MCase 25A	53	Trailer tow park lamps.
Fuse FMM/MCase 15A	55	Upfitter 2 relay [Raptor]
Fuse MICRO2 5A	58	USB smart charger.
Fuse MICRO2 15A	61	Spare
Fuse MICRO2 5A	62	Upfitter 6 relay [Raptor]
Fuse MICRO2 25A	63	4x4.
Fuse MICRO2 15A	64	E-locker.
Fuse FMM/MCase 40A	70	Anti-lock brake system (ABS) valves, Electric parking brake.
Fuse FMM/MCase 25A	71	4x4
Fuse MICRO2 10A	74	Trailer tow backup lamps.
Fuse FMM/MCase 40A	76	Body control module 2.
Fuse FMM/MCase 30A	77	Climate controlled seat.
Fuse MICRO2 10A	78	Spot light module.
Fuse MICRO2 10A	80	Heated windshield wiper.
Fuse MICRO2 10A	80	Upfitter 4 relay [Raptor]
Fuse MICRO2 30A	82	Transmission fluid pump.
Fuse MICRO2 5A	82	Powertrain control module [Diesel]
Fuse MICRO2 15A	83	Transmission control module.
Fuse MICRO2 10A	88	Multi-Contour Seats Relay.
Fuse MICRO2 10A	88	Upfitter 3 relay [Raptor]
Fuse FMM/MCase 30A	89	Power running boards
Fuse MICRO2 15A	93	Heated mirrors.
Fuse MICRO2 15A	94	Rear heated seat module [Raptor, Diesel]
Fuse MICRO2 15A	95	Not used (spare)
Fuse FMM/MCase 40A	97	Electric fan [Raptor]
Fuse FMM/MCase 50A	97	Powertrain control heater 1 [Diesel]
Fuse FMM/MCase 15A	98	10R transmission module r/s, [3.3L] transmission fluid pump.
Fuse FMM/MCase 40A	99	Heated rear window.
Fuse FMM/MCase 25A	100	Diesel exhaust fluid (DEF) heater relay [Diesel]
Fuse FMM/MCase 25A	101	Electric fan [Base only]
Fuse FMM/MCase 30A	102	Power sliding back window.
Fuse FMM/MCase 20A	103	Trailer tow stop-turn relay fuse.
Fuse MICRO2 15A	104	Snowplow switch, Rear heated seats [Base]
Fuse MICRO2 10A	105	Telescoping mirror.
Relay	R02	Powertrain control module relay.
Relay	R05	Electric fan relay.

Type	No.	Description
Fuse MICRO2 7.5A	2	Memory module logic, Memory seat switches, Lumbar motor.
Fuse MICRO2 20A	3	Driver door lock motor.
Fuse MICRO2 5A	4	Trailer brake control.
Fuse MICRO2 20A	5	Spare
Fuse MICRO3 10A	6	Spare
Fuse MICRO3 10A	7	Spare
Fuse MICRO3 10A	8	Spare
Fuse MICRO3 10A	9	Extended power module [Base only]
Fuse MICRO3 5A	10	Embedded modem module.
Fuse MICRO3 5A	11	Combined sensor module.
Fuse MICRO3 7.5A	12	Climate head module, Smart datalink connector.
Fuse MICRO3 7.5A	13	Cluster, Steering column control module.
Fuse MICRO3 10A	14	Brake on/off switch.
Fuse MICRO3 10A	15	Smart datalink connector.
Fuse MICRO2 15A	16	Tailgate release.
Fuse MICRO3 5A	17	Heads up display, Terrain switch, Ignition switch and passive-entry passivestart start stop switch.
Fuse MICRO3 5A	18	Key inhibit solenoid.
Fuse MICRO3 7.5A	19	Extended power module [except Raptor]
Fuse MICRO3 7.5A	19	Restraint control module [Raptor only]
Fuse MICRO3 5A	21	Heads up display, In car temperature with humidity sensor
Fuse MICRO3 5A	22	Passenger occupant detection [Raptor only]
Fuse MICRO2 10A	23	Power driven rear glass switch, Inverter, Driver side window, Moonroof, Vista roof.
Fuse MICRO2 20A	24	Central lock/unlock.
Fuse MICRO2 30A	25	Driver door control module.
Fuse MICRO2 30A	26	Passenger door control module.
Fuse MICRO2 30A	27	Vista roof, Moonroof.
Fuse MICRO2 20A	28	Spare
Fuse MICRO2 30A	29	Spare
Fuse MICRO2 30A	30	Spare
Fuse MICRO2 15A	31	Adjustable pedal switch and motor.
Fuse MICRO2 10A	32	Multi-function display, SYNC, Radio frequency receiver.
Fuse MICRO2 20A	33	Radio.
Fuse MICRO2 30A	34	Run-start relay.
Fuse MICRO2 5A	35	Selectable drive mode switch, Upfitter switches [Raptor only]
Fuse MICRO2 15A	36	360 camera module, Heated steering wheel module, Rear-view mirror. Rear heated seats, Lane departure warning module, Automatic high beam module, Image processing module A.
Fuse MICRO2 20A	37	Spare
Circuit breaker MAXI	38	Rear window switches and motors.

Ford F-150 fuse box diagrams change across years, pick the right year of your vehicle:

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Source: Ford F-150 2018 Owner's Manual

Related guides

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2018 Ford F-150 fuse box diagram - StartMyCar (2024)

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FAQs

What fuse controls the ignition? ›

Why won t my f150 ignition turn? ›