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

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: Starter won't turn over

Hi there. It is possible for the cables to develop excess resistance over time due to rust and corrosion, however, there could be an issue with the starter itself. A certified technician, such as one from YourMechanic, would be able...

Q: Brake lights stopped working

Hi there. Malfunctioning brake lights is a issue a commonly found in vehicles. If the bulbs have been replaced already this issue points towards the brake light switch that has deteriorated. The brake light switch sends a signal to your...

Q: Not getting enough fire to turn over

Hello. If you suspect the ignition system's are to blame, you will want to start there. When was the last time you changed the spark plugs? Have the ignition cables or spark plug wires ever been replaced? You can test...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.