Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSFORD1990RANGER 4WD L4-140 2.3L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSVEHICLE - WELDING PRECAUTIONS
1990 Ford Ranger 4WD L4-140 2.3L SOHC
Vehicle - Welding Precautions
1990 Ford Ranger 4WD L4-140 2.3L SOHCSECTION Vehicle - Welding Precautions
91ford15
Article No.
91-7-5
04/05/91
EEC - ELECTRONIC CONTROL MODULES AND PROCESSORS - POSSIBLE DAMAGE FROM ARC WELDING
FORD: 1985-91 CROWN VICTORIA, ESCORT, MUSTANG, TAURUS, TEMPO, THUNDERBIRD
LINCOLN-MERCURY: 1985-86 CAPRI 1985-91 CONTINENTAL, COUGAR, GRAND MARQUIS, MARK VII, TOPAZ 1986-91 SABLE, TOWN CAR 1991 CAPRI
MERKUR: 1985-89 XR4TI 1988-90 SCORPIO
LIGHT TRUCK: 1885-90 BRONCO II 1985-91 BRONCO, ECONOLINE, F-150, F-250, F-350, RANGER 1986-91 AEROSTAR 1989-91 F SUPER DUTY 1991 EXPLORER
MEDIUM/HEAVY TRUCK: 1991 F & B SERIES
ISSUE: Electronic control modules, including EEC processors, may be damaged if the negative battery ground cable is not disconnected before arc welding is performed. This occurs because the arc welding process can produce high electrical currents in the body of a vehicle when the negative battery ground cable is left connected.
ACTION: If arc welding procedures are to be performed, be sure to disconnect the battery ground cable.
CAUTION: DISCONNECT THE NEGATIVE BATTERY GROUND CABLE BEFORE USING ANY ELECTRIC WELDING EQUIPMENT.
OTHER APPLICABLE ARTICLES: NONE
SUPERSEDES: 90-11-6
WARRANTY STATUS: INFORMATION ONLY
OASIS CODES: 290000, 690000
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.