Top 20 2003 Ford Expedition - Page 2 Questions & Answers

Lack of power because of the vacuum leak wher the line is disconnected from. Start the engine and with hood raised, listen for the vacuum hiss fron it sucking air in and hook the loose line to that fitting where you hear the leak.

Could be 2 problems. Some rear main seals leak with oil flowing out where trans joins engine. You should crawl under vehicle and look directly up from oil leak, If inside garage use a newpaper to catch current drip. Gassy oil can be leaking fuel injector draining into oil pan. Sometimes dirty fuel injector will stay open and fuel pressure will continue to drain into motor after vehicle is off. Sometimes stuff like seafoam will clean injectors.

By 2003 most air-con systems had considerable electronic control and your problem might be caused by a malfunction there, wiring problems, compressor clutch problems or maybe there is a leak and the refrigerant pressure has already fallen to the point where the system is ceasing to work depending on temperature.

If it's in the windshield there is nothing you can do except check the coax cable. Unplug it and clean it tip.

Your missing something's G-404 has nothing to do with it ! Seats - Third Row The third row seat:

• is three-passenger seat.
• a 60/40 bench seat.
• folds down for more cargo area.
• has optional power fold down seats.

Third Row Power-Fold Seat CAUTION: To prevent possible damage to the third row seat or the safety belts, make sure that the safety belts are not fastened when moving the seat to the load floor position. CAUTION: Make sure that no objects such as books, purses or briefcases are on the floor in front of the third row seats or on the seat cushion before lowering the backrest(s). The third row power-fold seat consists of the following electrical components:

• right third row seat relay.
• left third row seat relay.
• right power-fold seat motor.
• left power-fold seat motor.
• right front third row seat switch (if equipped).
• left front third row seat switch (if equipped).
• right rear third row seat switch.
• left rear third row seat switch.

For the third row power-fold seat to operate, a shared ground is supplied by the body security module (BSM) to both of the power-fold seat relays, enabling the seats to then be moved by pressing one of the third row power-fold seat switches. The third row power-fold seat operates only when the vehicle is in PARK and the liftgate glass, liftgate door or any entry door must be open. The third row power-fold seat motors transfer movement to a drive gear assembly to raise and lower the seat backrest. The power-fold seat motors rotate a short drive cable which is connected to the drive gear assembly. The relay's are located in Aux. relay box #2

There is a timer circuit (ten minutes)... That should have shut down that power... My first recommendation are the FACTORY REPAIR MANUALS.... (not cheap but well worth the money IF you use them)... Just beware that the ELECTRICAL needs to be part of the books you buy, borrow (check). but of course ($$$$) cost ... ERGO a FREE site with very good circuit drawings & TSBs (tech bulletins)... Registration required at BBB Industries: BBB Industries Premium Alternators Starters Power Steering Products Ignition timer... probably under driver amenities. Hope this helps Carnac the Magnificent

Do you know how to test automotive electrical circuits ? Using a volt meter an wiring diagram to locate problems ? Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year ,make , model and engine size . Under system click on engine , under subsystem click starting . Click the search button then the blue link . The buzzing sound you hear may be the starter relay , do you know what a relay is ? Behind the right side kick panel , this is where the front passengers right foot would be next to . Pull the plastic cover and behind is the central junction box. You can check for B+ voltage where the relay plugs in . VEHICLE RELAYS Operation Diagnosis Electric Testing Techniques You Need to Know Ford F150 5 4 No Start No Crank No Communications Codes U1900 U2023

Both the 4X4 control module and the windshild wiper motor share a common ground point . G-301 , probably a lose connection. G301 kick panel, LH side

If it only does thens when cold, check to see if your vehicle has a cold start system that may not be working or is intermittent in action.

Take it to a shop and have a trained technician listen to the noise, but that noise is most likely a failing engine rod bearing.

If your saying the starter motor won't crank, make sure the battery has a full charge. Note the starter components picture, If that is what you have, I'd check the starter relay switch. It appears to be underhood--firewall or rear of fender lining, passenger side. See the two large lugs, that should be battery voltage to and from relay switch. The smaller terminal should be feed from crank position of ignition switch. In the past on different makes and models I have used a large screwdriver to short between the two large posts at the relay switch, to see if starter motor will crank. If you try this, make sure tranny is in park or neutral and parking brake is set. I may be coming in the back door to diagnose, but, It should lead to same place.

You need to put a scanner on the computer and read the codes, then repair the codes called for and using the scanner clear the codes and you will be ok. The button on the message center doesn't reset the computer it just clears the code from the screen.

There are several hundred areas that can make noise under the hood. My advise if you don't know where it is coming from and if it's really bad tow it to a mechanic. Depending what it is it could be serious.

Hi Ron. I would take it to a mechanic that you trust. Its very possible that you have a bad BCM, ( Body Control Module). Hope this helps.

Chilton Haynes Auto Truck Repair Service Shop Manuals

best way to find out what could have happened is to have the OBD codes read and see if any codes come up

Check the actuator motor on the heater if controls the doors that direct the heat and ac. It is an easy replacement part and as to the cost I wouldn't know but you can check price on line at autozone.

You will have to change the radio it is all in one peace

Could be a little thing's, security system issue, fuel issue or a EGR or Throttle senser issue.

Check your battery connections - where the cables connect to the battery posts AND where the cables connect to the starter/main power feed and where the ground cable connects to the engine and/or frame. A poor or corroded connection can cause intermittent problems and poor charging performance.