Q: i replaced the cluster and disconnected the battery. when i connected everything again the theft alarm was on and car doesnt start

asked by on January 06, 2017

i need to know how to reset the theft alarm on my Mustang 1999 v6 i replaced cluster box and disconnected the battery now car does not want to start theft light flashing
My car has an automatic transmission.

Car is not starting Inspection $79.99 - $89.99 Get a Quote

Hello, thank you for writing in. The first thing we need to determine is if this is a stock alarm or an aftermarket that was installed later. There may be a technical issue with the alarm module itself. The keys as well may need to be programmed again if there was a lock out feature tripped. If this is a stock alarm, you will need to look into your owner’s manual for more information on how it works, and how to resolve the issue. If this is an aftermarket alarm, you will need to look into the components that are supplying it with power and input signals. There is likely something wrong with the alarm’s computer or wiring. If the key needs to be reprogrammed, only the dealership can do that for you. More information is needed to proceed with diagnostics in this situation. For more help determining the issue, contact our service department.

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

What others are asking

How can i fix my locked ignition cylinder

If the key won't turn in the lock cylinder, it is a mechanical issue. If this happened to me, I would be removing the steering column covers again to see what is physically keeping the lock cylinder from turning. As...

I was driving and my raidiator busted and my car shut down and It won’t start

Lending cars, Whew! it never turns out well. Its hard to imagine all those things going at once. The only scenario I can come up with is that the serpentine belt may have failed, possibly damaging the radiator, but also...

Transmission fluid leaked while pulling a car out of mud

From the description you're giving me, I'm not sure. I know many Fords, including my F150, have a circular seal type bell housing inspection cover near the transmission. Fluid pooled in this area generally indicates an engine oil leak from...

P 0400 error

Diagnostic Trouble Code P0400 can set if the EGR valve is faulty but other causes for code are a break in the vacuum line to the EGR valve, a faulty EGR temperature sensor, or carbon deposits and blockages in the...

Electric power steering rack 2012 Ford Focus

Hi there - the electrically-assisted steering rack does have a software component that must be loaded, and sync'd with the rest of the car. This will require a visit to your Ford dealer, or Ford service center with this capability....

What does the air bag readiness Warning Light mean?

The air bag readiness Warning Light is located on the instrument panel. This light illuminates when there is an issue with the air bag system. Since the air bags are an extremely important safety in your vehicle, you should schedule...

Battery is dead and engine doesn't crank

Hello! I'll be happy to assist you. I believe the issue may be the ignition key tumbler. The wires inside of the steering column connecting to the ignition key tumbler to the steering column tend to break. The wiring may...

Car died while driving and cranks but wont turn over. Had a check engine light on for P0030. Insight on why it wont start?

When you say the car cranks "lightly" it makes me wonder if you've had a timing belt break. The timing belt is supposed to be changed at around 90,000 miles, and if that is not done, the belt could fail,...

The brake locks on me and won't let me start my car.

Hey there, thanks for writing in about your 2015 Chrysler 200. You may have a problem with the master cylinder or with the brake pedal assembly itself. The brake pedal needs to be pushed to start the vehicle, so if...

Related articles

A Buyer’s Guide to the 2012 Ford Explorer
Over Over 20 years ago, Ford changed everything for the American car-buying market when they introduced the first generation of the Explorer. Today, the 2012 Ford Explorer continues the evolution of modern large SUVs with a number of updates, including...
The Best Used Cars to Buy for Highway Driving
Do Do you spend hours each week on the highway for work? Maybe you just live in a very rural area and have to drive for 30 or 45 minutes to get to the grocery store. Whatever the case, your...
The Best Used Cars to Buy If You're a Fisherman
What What do anglers look for, specifically, in their vehicles? Lots of room, plenty of cargo space, and sometimes, the ability to handle rough terrain. Some fishermen also want the option of towing a boat. With that in mind, we...