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Expedition is overcharging - 2004 Ford Expedition

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Have you taken the alternator off the truck and had it tested ?
It has a regulator built in that could have failed.
Its also controlled by the computer on the truck.

Posted on Jan 15, 2013


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I have 1999 ford expedition and the alternator is overcharging and all lights are blinking

Have the battery tested and if its good check fuses. If its not that its a wiring issue.

Nov 09, 2015 | 1999 Ford Expedition

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Temp data error and charging data error

some of the alternators on these would start to overcharge when they go bad this will cause data errors due to high voltage have a charge test performed.

Dec 06, 2013 | 2005 Ford Expedition Eddie

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I have ford expedition 2010 it has a/c proplem

Have you done any work to the AC system recently? It sounds like the system is overcharged or the AC clutch is starting freeze up.

Jul 09, 2012 | Cars & Trucks

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Alternator is overcharging but only a little. 15.3 volts. What causes this?

You're correct normal voltage range while you're vehicle is running will be around 14.1-14.7v the overcharging slightly has to do with the components inside your alternator. An irregular stator or magnetic brushes for instance. This shouldn't pose as a problem for you. Fyi racing applications most often run a 16v starting/charging setup and the electronic components in those are not affected by the higher voltage levels in anyway.

Dec 23, 2010 | 1997 Ford Expedition

1 Answer

I have a 2004 Ford Expedition this morning my drivers side window would only go down and the rear would not do anything. This afternoon the drivers side will not move the drivers rear works but the...

that's impossible. you are making this up. seriously, it is probably the master switch on the driver's door. you may be able to get an aftermarket through auto zone, but if not, i'm sure the dealer will be glad to way overcharge you for one. real easy to put in, pry it out, unplug it, plug in the new one, snap it in. it would be nice if you had a test lite and could check the switch, but they are fairly cheap and would not cost as much as a trip to the dealer

Jul 07, 2010 | 2004 Ford Expedition

1 Answer

A/c recharge what is thew psi for refrigerant

Below are normal car AC pressure readings with 134A.

Normal readings on high and low side with AC OFF (static pressure) – Depends on outside temperature, but normally is between 80-105 PSI

Normal low side reading with AC on high speed and MAX & engine at 800-1000 RPM’s – Ranges from 25-35 PSI

Normal high side reading ranges from 200-350 PSI
Don’t assume that if adding little Freon is good that adding a lot is better! Overcharging just a little can decrease the performance of the system and possibly damage the compressor.

With the AC on the coldest setting, use a thermometer in a middle vent. Normal vent temperature readings will vary depending on the (ambient) outside temp. The vent temperature should range from around 42-55 degrees in my experience.

If normal gauge readings are obtained and the vent air is cold – STOP don’t overcharge the system. The only proper way to remove refrigerant is with a AC recovery machine so if this is being done at home I can’t emphasize enough not to over charge the system.

Thank you for using fixya and be safe.

Jun 17, 2010 | 2002 Ford Expedition

1 Answer

How do youo put freon in 99 ford expedition

Find your evaporator canister which will be toward the firewall. The low port is hard to see. You will need to buy yourself a re-fill kit which comes with the freon and gauge. Warm the engine and turn air cond. on. Attach the hose to your low port. Attach the can to the hose and turn the needle to pierce the top of the can. Be sure to turn the valve needle slowly to release the freon into the system. If the can starts to frost over, wrap a warm cloth around can to get the freon to flow easier. The kit will come with a gauge which will tell you if the system is already overcharged with problems or if the system needs freon. The one I have has yellow, blue, green, and red. The yellow is low, blue is good but the system could still use more depending on the psi, green is overcharged, and red is over charged with system problems, or other system problem.

May 15, 2010 | 1999 Ford Expedition

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