I have a 1999 ford Expedition(122,000 miles) 4x4, 5.4 litre and I was wondering if someone can tell me why my truck goes completely dead if not used for one day. I can drive it all week to work with it starting everyday. If I don't drive it Saturday and Sunday I go to start it, it is dead until I jump it with cables and it starts instantly. I also wonder why my heating and A/C controls stay on even if my truck is turned off. Since this has been happening I make sure the controls are off to make sure I dont kill the battery when I turn the truck off. I have also been getting a series of 5 beeps in 5 sets at not specific times while I'm driving, could I have a short somewhere? I would greatly appreciate any answers. I have been a Ford man all my life and I have been extremely happy with my vehicle, I hope someone can help me

 

If I have it correct, 3 problems.

P1. Truck goes completely dead if not used for one day. I can drive it all week to work with it starting everyday. If I don't drive it Saturday and Sunday I go to start it, it is dead until I jump it with cables and it starts instantly.

P2. heating and A/C controls stay on even if my truck is turned off

P3. I have also been getting a series of 5 beeps in 5 sets at not specific times while I'm driving

Problem #1 could be associated with problem #2. On a F-150 the heating controls staying on are a sign of a GEM that has gotten wet. IF your passenger compartment fuse panel is by the left knee of the driver in the dash, take a look at the fire wall, where the carpet goes up on the firewall for signs of water damage. If the Blower stays on, this can kill the battery.

Problem #2. Sounds like a wet GEM, have you had rain or melting snow on the driver's side of the windshield ?

Problem #3. Sounds like the SRS light is burnt out. The 5 beeps is a warning that the bulb is burn out for the SRS / Airbag. When you turn the key on, does the SRS light come on ?
If you have a digital odometer, you can use the DTM mode for the cluster, and one of the items is the bulb test.

Directions in next post.

 

Activating Test Mode

To enter the HEC Dealer test mode, depress and hold the instrument cluster SELECT/RESET button, turn the ignition switch to the RUN position, and then continue pressing the SELECT/RESET button (5 seconds) until tESt is displayed in the odometer. The SELECT/RESET button must be released within 3 seconds of the odometer tESt display to begin the dealer test mode.

Depress the SELECT/RESET button to advance through the following steps until dtc is displayed. Depressing the SELECT/RESET button will display any stored continuous DTCs before proceeding to the next step.

GAGE
Activates gauge sweep of all gauges, then displays present gauge values. Also carries out the checksum tests on ROM and EE. If the gauge sweep is inoperative, INSTALL a new instrument cluster.

All segments illuminated
illuminates all odometer segments. If any odometer segment is inoperative INSTALL a new instrument cluster.

bulb
illuminates all micro-controlled indicators and LEDs. Install a new indicator or LED as necessary.

r
Returns to normal operation of all micro-controlled indicators and LEDs and displays hexadecimal value for ROM level. (used when requesting assistance from the hotline). If alternating flashes for FAIL and ROM level are displayed, INSTALL a new instrument cluster.

EE
Displays the hexadecimal value for EE level (used when requesting assistance from hotline). If alternating flashes of FAIL and EE level are displayed replace instrument cluster.

dt
Displays hexadecimal coding of final manufacturing test date (used when requesting assistance from hotline).

dtc
Displays continuous DTC's in hexadecimal format. Pressing the SELECT/RESET button will display any DTCs stored before proceeding to the next step.

enG
Displays the English speed in MPH. Speedometer will indicate present speed within tolerances. Display will show 0 if input in not received. If input is invalid for one second or more, or if speed is 0.

m
Displays the metric speed data in kph. Speedometer will indicate present speed within tolerances. Display will show 0 if input in not received. If input is invalid for one second or more, or if speed is 0.

tAc
Displays the tachometer data received from the PCM via the SCP network within tolerances. Tachometer will indicate present RPM. Display will show 0 if input is no received, if input received is invalid for one second or more, or if engine RPM is 0.

FUEL
Displays the code (0-255) for the fuel sender input to the HEC. The fuel gauge will display a filtered fuel level value. This filter will keep the pointer from moving suddenly or erratically.
255 open send +/- 0
232 full stop +/- 0
215 Full mark +/- 10
178 3/4 mark +/- 8
138 1/2 mark +/- 7
93 1/4 mark +/- 5
41 E mark +/- 4
54 Low Fuel (0-59)
0-18 short (0-20 max)

OIL
Displays the code (0-250) for the oil pressure switch input to the HEC. Oil pressure gauge will indicate present oil pressure. Normal oil pressure (greater than 6psi) will display a value between 000 and 176. A low oil pressure or an inoperative engine oil pressure switch (less than 6 psi) will display a value greater than 176.

dEGC
Display of engine temperature in Degrees C input from cylinder head temperature sensor.
49 C "C" mark
60 C Normal band start
120 C Normal band end
-40 C No SCP message for 5 seconds

bAtt
Displays the code (0-255) for the battery voltage input to the HEC. Battery voltage gauge will indicate present battery voltage.
93-102 6.2-9.1 volts, low voltage
115-124 8.5-10.7 volts, Normal band start
215-225 15.8-18 volts, Norm band end
230-241 16.9-19.1 volts, high voltage

rhEo
Displays the present decimal rheostat dimming input, 0-255 (used when requesting assistance from the hotline)

rhi
not used

rhS
not used

rho
not used

Cr
Displays the current RUN/START sense input. Display will show -h for high input with the ignition switch in the START position and -L for low input with the ignition switch in the RUN position.

PA-PE7
not used

GAGE
Repeats the display cycle

Source: Helms 99 manual.