Component Tests

WARNING: This page is about a different car, the 2022 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.

Generator On-Vehicle Tests - No-Load Test

Turn off all electrical loads and the ignition switch.
Switch the multimeter to the voltage function.
Connect the leads of the multimeter across the battery terminals.
Read the voltage (base voltage).
Start the engine.
Run the engine at 1500 RPM with no electrical load.
Read the voltage. The voltage should be in the range of 14.1 volts to 15.1 volts. If the voltage increase is less than 2.5 volts above the base voltage, carry out the Load Test. If the voltage increase is greater than 2.5 volts, REFER to the Ford diagnostic equipment.

Generator On-Vehicle Tests - Load Test

With the engine running, turn on the air conditioning (if equipped), turn the blower motor to high speed and the headlamps to high beam.

Increase the engine speed to 2000 RPM. The voltage should increase a minimum of 0.5 volts above the base voltage. If the voltage does not increase as specified, REFER to the Ford diagnostic equipment. If the voltage increases as specified, the charging system is charging correctly.

Battery Tests

Battery Identification

Courtesy of FORD MOTOR COMPANY

Item	Part Number	Description
1	--	Cold crank amp (CCA) rating
2	--	Reserve capacity (RC) rating (minutes)
3	--	Battery voltage
4	--	Ford Part number
5	--	FINIS code
6	--	EN number (European Norm)
7	--	Battery type: Ca = Silver/Calcium; Sb = Lead/Antimony
8	--	Amp hour rating

Courtesy of FORD MOTOR COMPANY

Item	Part Number	Description
1	--	Battery performance data
2	--	Motorcraft internal labelling
3	--	DIN labelling

Battery Performance Data

NOTE: The data only applies to a new fully-charged battery.

The first group of digits (12V) indicates the battery voltage (12 volts).
The second group of digits (590A) indicates that the battery delivers a current of 590 amps at -18deg.C without the terminal voltage falling below 7.2 volts.
The third group of digits (90RC) indicates the time in minutes in which the battery voltage falls to 10.5 volts in the case of a 25 amp load and an ambient temperature of 22deg.C.

DIN Labelling

The first group of letters (WF) indicates that the battery is maintenance-free.
The first digit (5) indicates that the battery is 12 volts.
The second and third digits (58) indicates the battery capacity is 58 Ah, which means it could power a 58 amp load for 1 hour.
The last two digits (11) is a sequential serial number.

Midtronics EXP-1050 Battery Tester

The Midtronics EXP-1050 battery tester is the only battery tester recommended by Ford to test latest technology batteries including Absorbent Glass Mat (AGM) and Enhanced Flooded Battery (EFB), previously known as Improved Flooded Battery (IFB) used on Ford Start-Stop vehicles.

Courtesy of FORD MOTOR COMPANY

Main specifications of the Midtronics EXP-1050 battery tester

Tests 6/12V batteries
Tests discharged batteries down to 1V both in and out of the vehicle
Ratings in battery tester: CCA, JIS, EN, DIN, IEC, SAE
CCA range: By Ford battery type 100-1700 A SAE / EN / CCA 100-1000 A DIN / IEC All current JIS codes
Large LCD display with adjustable backlight
Detects short-circuited cells
Surface charge removal procedure
Dynamic Response procedure for refined decisiveness on battery diagnostics
Upgradeable by SD card
Export data feature to send data to infra red printer
Voltmeter function
Date and time indication with every test
23 languages included within the battery tester

Using the Midtronics EXP-1050 Battery Tester

Disconnect the battery ground cable at the battery negative (-) post.
NOTE: If using this battery tester on models where the ground cable is not accessible, the battery does not have to be removed from the vehicle and may be tested using the vehicle's 'jump start post' if the battery tester is set to the correct mode. In this case, the battery must be disconnected at the positive (+) post before testing.
Connect the positive red clamp of the Midtronics EXP-1050 battery tester to the battery positive (+) post.
Connect the negative black clamp of the Midtronics EXP-1050 battery tester to the battery negative (-) post or jump start post as appropriate.

A poor connection will prevent testing and the battery tester will display the message CHECK CONNECTION. If this message appears after you have correctly reconnected the clamps, clean the terminals and reconnect.

It is recommended that batteries are always tested using both battery posts. However, if used in 'jump start post' mode, the Midtronics EXP-1050 battery tester will compensate for the extra resistance of the additional cable.

Select BATTERY TEST or START-STOP BATTERY TEST.
- Press the NEXT key to continue.
Select the BATTERY LOCATION
- UNDER HOOD
- UNDER SEAT
- OUT OF VEHICLE
- Press the NEXT key to continue.
Select the negative POST TYPE (IN-VEHICLE ONLY)
- BATTERY POST
- JUMP START POST
- JUMP START POST (Battery Monitoring Sensor)
- Press the NEXT key to continue.
Select the BATTERY RATING from the drop down list.
- Press the NEXT key to test the battery.
If the battery under test is not listed in the drop down list, it can still be selected with the MANUAL ENTRY mode. This is item 11 of 11 in the list.

The Midtronics EXP-1050 battery tester will display the word TESTING while it evaluates the battery.

Battery Tester Results and Required Actions

Battery Tester Reading	Action
GOOD BATTERY	Return the battery to service
GOOD - RECHARGE	Fully recharge the battery and return it to service
CHARGE and RETEST	Fully charge the battery and retest (failure to fully charge the battery before retesting may cause false readings)
REPLACE BATTERY or BAD CELL BATTERY	WARNING: Do not recharge the battery. Make sure that the surface charge was removed. A "REPLACE BATTERY" result could also mean a poor connection between the battery cables and the battery. Check the connections are OK and retest. If the result remains the same, INSTALL a NEW battery
In addition it is advisable to check the vehicle electrical system. Check that the generator is functioning correctly and the vehicle does not have an excessive key-off load (in general this should be under 20mA after 40 minutes of key off).

Midtronics EXP-1050 Battery Tester Test Code

At the end of the test, use the arrow keys to scroll down the screens to see additional information. One of these is the TEST CODE.

The TEST CODE has 11 digits, for example: 0021U-B88WKX.

Midtronics GRX-3590 Battery Diagnostic Station

Using the Midtronics GRX-3590

Courtesy of FORD MOTOR COMPANY

Item	Description
1	GRX-3590 stand-alone version with integrated keypad and display
2	GRX-3590 docking station

The Midtronics GRX-3590 is both a battery charger and battery tester and automatically removes the surface charge as part of the normal operating procedure.

The Midtronics GRX-3590 can be used on a battery in-vehicle or out-of-vehicle.

Disconnect the battery ground cable.
Connect the positive red clamp from the Midtronics GRX-3590 to the battery positive terminal.
Connect the negative black clamp from the Midtronics GRX-3590 to the battery negative terminal.
Connect the AC power cable to the mains outlet and switch ON.
Follow the instructions supplied with the Midtronics GRX-3590 to charge the battery.
To disconnect the Midtronics GRX-3590, reverse the connection procedure.

The Midtronics GRX-3590 will automatically carry out a charge cycle before giving the resulting test code. The TEST CODE has 13 digits, for example: Y74NH-58R36-ESV. It will bring the battery into a serviceable condition and if required can proceed to fully charge the battery.