Relays problems

Relays: Switch activated electrically.
Read more
More specific problems:
Related problems:

Top problems

fuel relay fuse problems

Ford Expedition 2006  144000 miles
my 15a fuse keep blowing as soon i out the ignition on
mideo from United States 2 years ago  
MI
5 reports 
RedLane44 from United States 2 years ago
Same for me. I replaced the pump and it still does. Did you figure it out
Comment

Relay 203 is burning out and melting

Ford Expedition 2003 5.4 L V8 150000 miles
My relay 203 keeps burning out I put a multifunctional relay and it keeps burning out on a daily basis.
Reaper from United States 9 months ago  
RE
1 report 

A/C clutch relay and schematics

Ford Expedition 2003 5.4l 220999 miles
A/c clutch relay position 220
Dickie from United States a year ago  
DI
3 reports 

Won't start

Ford Expedition 2003 Eddie Bauer  175000 miles
I bought this truck a couple months ago and when I checked it out I started it it sounded fine so the next day I bought it it ran fine for about half the day then I went out to start at one time and it wouldn't start and I've never been able to start again so I replaced the fuel pump the fuel filter I moved around some relays and see if maybe that was it I did find a burned out fuel pump relay on the board that I switched out and still won't start and the damnedest thing it seems like it's not getting power to the ignition or something because when I put the key in and turn it I get nothing bu… Read complete
Phinphan77 from United States a year ago  
PH
4 reports 
Phinphan77 from United States a year ago
I tried switching out the mother board in the fuse box and still have the same issue didn't change anything when I push on the one plug it still tries to start not sure what to do next any ideas?
Phinphan77 from United States a year ago
Still haven't figured out what is wrong with it
Girllovecars from United States a year ago
Check the timing belt maybe it's loose and it skipped a couple of spaces and it's not running correctly
Misstrill801 from United States 8 months ago
Its ur inherta *fuel injector cut off switch) if the push button poped up and click back down replace it and it will start up
Comment

Check charging system

Ford Expedition 2003  150000 miles
I changed the fuse box after my fuel pump relay went out not my alternator won't charge and it's killing my battery now
Rayray from United States 4 years ago  
RA
9 reports 
Bruce from United States 4 years ago
If the alternator is not charging the battery, the battery will eventually drain and the vehicle may not start. Here are some things you can check:

Check the alternator belt: Make sure the alternator belt is tight and not slipping. If the belt is loose, it can cause the alternator to spin too slowly to effectively charge the battery.
Check the alternator connections: Make sure the connections between the alternator and battery are clean and tight. If the connections are loose or corroded, the alternator may not be able to effectively charge the battery.
Check the alternator itself: If the alternator belt is tight and the connections are good, you may have a problem with the alternator itself. You can have the alternator tested at a local auto parts store or mechanic to determine if it needs to be replaced.
Check the voltage regulator: The voltage regulator is responsible for controlling the voltage output of the alternator. If the voltage regulator is faulty, it may cause the alternator to not charge the battery.
Mike from United States 3 years ago
If everything worked be for you took fuse panel out I would start there. I had to replace fuel relay but I cut connection wire from plug and put relay that was easier to get to and there’s a wire that shuts pump off so it wouldn’t flood the motor fine it and hook to relay but it will still run even though you just wire in new relay - the problem with taking fuse panel and replace relay is it could go out again it gets hot behind the panel and that’s the problem usually
Comment

Cranks Starts and dies

Ford Expedition 2012 XLT 4WD 5.4L 3V 220000 miles
Performed a timing job replacing timing chain guides, timing chains, lower sproket, rocker arms, lash adjusters, set to time. Started, detected an oil leak on passanger side valve cover gasket, reset gasket, not sure if leak controller entirely. Started stalling while pressing brake pedal and started running rough. Chased leak, removed power brake booster to replace but found main vacuum hose loose. Reinstalled booster, reconnected vacuum hose apparently no more leaks. Noticed the message in the dashboard asking to check break system, parking break light on but break not set, and rear lights a… Read complete
MannyG from United States 9 months ago  
MA
1 report 
Trailer from United States 9 months ago
Your timing is off. You need to go back in and redo it
MannyG from United States 8 months ago
Found two relays acting up (PCM) and fuel pump, closing circuit erratic, used forscan and found silent dtcs, all related to low voltage, new battery is installed, crancked and started running smooth, but having trouble to run on idle (dies often but starts right away) check brake system was resolved by replacing brake light switch, lights are normal and doesn't die anymore. Drove around all normal for 15-20 miles even in traffic, parked to get a soda and then started running rough. Revving up it run smooth. New Forscan shows dtcs P0356,369, 390, 394, indicating a problem with cam sensors circuitry. Is there a way to test the sensors? testing the wiring, the reference would be ground or everything has to be pcm? By the way information I found onDTC was at RUC module that affects fuel pump driver, once dtc cleared and new battery, problem was gone, now I have to deal with the new codes. It is a never ending
Comment

Weak crank no start

Ford Expedition 2008 Expedition EL Eddie bower  295000 miles
Sometimes it'll start fine other times it'll slow start or weak start or week crank no start I had the battery tested and it's good starter's new fuses are good switch relay from AC to starter relay same thing no start now it won't do anything
Nate from United States 3 years ago  
NA
5 reports 
Jay c from United States 3 years ago
Did you try removing the crankshaft position sensor and make sure that it isn't gunked up or have a break in the wire
Joe r from United States 4 months ago
No but it’s something electrical
Comment

Fuel pump stays running with key on and engine off

Ford Expedition 2006 5.4L 3V XLT 193000 miles
I believe it has something to do with relay R303 but I'm not completely sure. When you cycle the key the pump should come on for a second or two before shutting off the pump, but for me it just stays running. An other issue it had was at a stop it would idle fine but buck and not want to go unless you mashed the throttle a couple times then it'd wake up and go, but that's probably because of the cam phaser.
Anitomical from United States a year ago  
AN
2 reports 
Wizard Dave from United States a year ago
But my security light is also flashing rapidly
Comment

Moonroof blues

Ford Expedition 2003 Eddie Bauer 230000 miles
Moonroof and 3rd row windows just stopped working one day, and I don't see a fuse or relay that could be at the root of the problem.
M.G. from United States 2 years ago  
M.
3 reports 
Jona from United States 2 years ago
I have the same issue
Comment

Pats system code 16

Ford Expedition 1999  180000 miles
I was driving and a spark plug blew out of head fuel pump relay was constantly making contact plugged into the diagnostics not making communication the path system has fuel cut off to the injector s
Daivd mac from United States 4 years ago  
DA
4 reports 
SlicRick from United States 3 years ago
I'm having issue with pats as well
Comment

Fuse box diagram

Ford Expedition 2005 5.4 216791 miles
Starter solenoid fuse keeps blowing and don't know my starter relay fuse
Just9732 from United States 2 months ago  
JU

Battery voltage drops 4 volts at start up

Ford Expedition 2000 XLT/4.6 268000 miles
Battery reserve relay keeps clicking after try to start car
JahKine from United States 5 months ago  
JA
1 report 

Shuts off randomly after you drive it & it warms up some.

Ford Expedition 2004 Eddie Bauer edition 5.4l 265852 miles
Initially I thought it may be the fuel filter so I replaced that & instead of shutting off & having to fight for 5 minutes to get it to crank back up it now cranks back up within a try or two & will run another 1/2 mile or so before shutting off on me again. I don't believe it's the fuel pump itself but maybe the crankshaft position sensor or relay or possibly the fuel pump module but I'm no expert & only have learned by what my dad & grandpa has taught me over the years along with mechanic classes in college. So any advice or anyone with knowledge who's been through this as well I'd be greatly appreciated to hear your opinion & input on the situation. Thank you in advance.
Cchicks from United States 6 months ago  
CC

Highbeams won't turn off

Ford Expedition 2004  100421 miles
When i turn on my expedition my highbeams stay on but when I take off the relay my highbeams turn off
Abraham from United States 8 months ago  
AB

Was driving smoothly between 70-80 mph when rpm’s & engine cut off

Ford Expedition 2000 Expedition 136500 miles
None of the gauges read. Everything is on zero or empty on Fuel gauge. Service engine light on. There is power and gauge for fuel was about 1/2 full when problem occurred. Engine will not start, cranks okay but just won’t turn over. Was watching YouTube videos and maybe a relay or fuse? Can they tell at auto parts store if they hook up diagnostic tool?
Racar from United States a year ago  
RA
1 report 

Can't get my turn signals or hazard lights to function

Ford Expedition 1999 4.6L  270152 miles
I checked the relays under the steering wheel under the dash and using a multimeter on ohms I get a reading on the black relay it reads 75 ohms but I don't get one on the blue. Any reason why this is? Does that mean it's bad?
Curt P from United States a year ago  
CU
3 reports 

Crank won’t start...had me key made also. Can’t tell if it’sI on secur

Ford Expedition 2003 Expedition 2000000 miles
Cranks but not start...had a new key made... but not getting enough gas to start...how do I tell if it’s in security mode can’t tell if it fuel pump...r relay ignition switch…
Scarlet4j@aol.com from United States 3 years ago  
SC
22 reports 

Heated Steering Wheel

Ford Expedition 2018 Max 156000 miles
Heated steering wheel and heated seats not working. Not sure if its fuses or relay. Anyone experience that?
CJ212 from United States 4 years ago  
CJ
3 reports 

Windows dont work no blown fuses

Ford Expedition 1999 1999 143000 miles
My passenger window stopped working I switched out the switch on the driver side window and the passenger side window now both windows are not working after my boyfriend use a tester and poked it in the wrong spot and the fuse box sparked there is no burnt out fuses can the relay number two under the dash gets very very hot not sure what's going on how to roll my windows up somebody help
Dazy from United States 9 years ago  
DA
11 reports 
Problems with a Expedition? Share them
Submit commentCancel
Submit replyCancel