Skip the auto shop - Our mechanics make house calls

Q: Accidentally grounded out hot wire to chassis, now no electric available.

asked by on

I accidentally grounded a hot wire from the positive terminal to the body, now there's absolutely no electrical in the car. All the fuses are in tact, is there a relay I can test before checking/replacing the PCM?

My car has 56000 miles.

Hello. There are high current fusible links that should be tested before you look at the relays, particularly the circuit opening relay(s). These links are depicted on the factory wiring diagram for the vehicle. Since you short-circuited the battery, it’s worth testing the battery (voltage, load test as well) to see if perhaps the battery is simply not putting out sufficient voltage.

It’s a long shot, but nevertheless has to be done to rule out obvious possibilities. To do a proper and systematic check of the fusible links, wiring, and relays, and trace the "main circuits" to the point of failure requires the wiring diagrams. I recommend setting up an electric diagnostic with a certified technician in order to get this covered. They will be able to scope the situation out and let you know exactly what should be done so that you don’t have to guess.

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!
  • Home
  • Questions
  • Accidentally grounded out hot wire to chassis, now no electric available.

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: When doing a radiator flush - do you need to replace the thermostat or any other components of the cooling system

Doing a radiator flush does not require any other component to be replaced. However, if the system has a lot of debris and scale in it, the thermostat may need to be replaced if it gets clogged or corroded. The...

Q: Car engine dies while driving

Hi there, it is possible that the ignition switch could cause this if it was failing and turning the engine off, it could also be a fuel pump, alternator or various other issues. A qualified technician will be able to...

Q: Bluetooth has failed

Hello, thanks for writing in. Having to "replace the computer" seems a bit extreme. Most bluetooth issues can be resolved by turning the phone off, then back on. If you are using an iPhone, make sure "autosync" is turned off...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...