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.

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.

Was this answer helpful?
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

Brake light malfunction and ABS light has been on for months.

Check the brake light switch on the brake pedal and see if its loose on the contact pin. If the pin feels loose, then the switch needs replaced. For the ABS light to be on, there could be an issue...

Cold engine makes cracking noises on start

Hi, most likely, this noise comes from worn internal components in your engine that momentarily do not have oil pressure to eliminate metal-to-metal contact. When oil pressure comes up, usually within a few seconds of engine operation, pressurized oil prevents...

Engine cranks but has trouble starting only when it's cold outside.

When the problem is happening you should turn the key to the run position to see if theft light comes on and then goes out. If the system keeps the theft light on then you most likely have a bad...

Related articles

The Best Used Cars to Buy for Senior Citizens
Everyone Everyone needs a way to get around. You need to get groceries, get to doctors’ appointments, visit with family and more. However, senior citizens have very different needs when it comes to buying a used car than other demographics....
The Best Used Cars to Buy If You’re a Massage Therapist
If If you're a massage therapist, one of the cornerstones of your business has to be that you don’t keep your clients waiting. That means you need a vehicle that’s reliable. You also will have to move your gear, including...
How to Find the Keyless Code on a Ford Explorer or Mercury Mountaineer
Many Many Ford Explorers and Mercury Mountaineers were manufactured with an option known as the Ford keyless entry keypad. Some models refer to it as SecuriCode as well. It is a five-button numeric keypad that is used to: Eliminate...