Skip the auto shop - Our mechanics make house calls

Q: Car won't start - 1991 Ford E-350 Econoline

asked by on

I crossed the cables briefly when jump starting my car. I got the battery tested and it still has power but I'm not getting any power from my battery. Car won't turn over, lights won't come on, nothing. I checked the fuse box inside the cab and everything looks good but I can't find the second fuse box under the hood. Do you know where it would be? Or any other suggestions, thanks!

My car has 116000 miles.
My car has an automatic transmission.

A: Crossing the positive and negative battery ...

Crossing the positive and negative battery cables is typically pretty bad for the electronics. The battery takes the brunt of the short. It very well could have fried it. What kind of battery test was performed? Essentially you are sending a high current through the negative or grounds in the vehicle. These are never supposed to be energized and can do a lot of damage. Unfortunately, you will want to start by replacing the battery, or just testing the vehicle with a known good battery. If the vehicle still doesn’t start, you can start looking into the fuse boxes and other components. With absolutely no electrical response at the moment, the battery is likely the issue, but complete computer failure is also possible, as well as damage to the entire wiring harness. If you would like to have this taken care of, a qualified professional from YourMechanic can come to your car’s location to diagnose the no start and guide you through repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Cars light and everything turns on but won't start and no nose

Be sure not to remove the battery cables if and once the vehicle is running. Removal of the battery from the circuit at that time can cause a voltage excursion which will damage the PCM (powertrain control module or "vehicle...

Q: Car overheats smoke from windshield area - 1991 Toyota Cressida

Smoke at the windshield area often signals an issue at the inlet/outlet of the heater core. The system needs to be visually inspected for leaks and a cooling system pressure test conducted. If smoke is visible at times this indicates...

Q: the car will turn over but it wont crank

Hello...we can help you with that. If you have a good battery and your starter motor is turning over the engine rapidly enough, that means you have a problem in the area of ignition or fuel. That would includes things...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.