My 1998 mustang gt the anti theft is flashing the pcm data link is dead doesnt let nothing read the computer the car just keeps cranking but doesnt start the fuel pumps is good does thr ccrm has to do with this problem i changed the transciever on the ignition but didnt help its like theres no power in the front engine the fuses our good i think it cuold be the pcm or ccrm module

The fuel pump or ignition circuit is disabled by the anti-theft system. Beginning with some higher-end models in 1996, Ford embedded an RFID chip in the plastic on the key handle. If that is broken out or damaged, you're locked out, and you'll have to replace the key.

What do you mean won't start ? When you turn the key to start the starter won't engage an spin the engine ? Anti-theft light lit or flashing ? How do you know no power to instrument cluster ? Did you check power an ground circuit's for the cluster using a DVOM - digital volt ohmmeter. or is it nothing lights up. A dead instrument cluster can cause a no crank - no - start condition . Bring down serial data buss . All the modules on the vehicle - PCM - engine computer , Body control module , ABS , air bag's etc... all communicate (talk with ) share info. on this serial data buss . If the PCM loose's communication with the PCM , the PCM will not energize the starter relay .

I am assuming you installed a used or junkyard PCM into the vehicle. You are probably experiencing issues from a misprogrammed unit. Each PCM is programmed to the VIN-specific installed components of the vehicle. For example, my 1999 Dakota did not come with a factory anti-theft system installed. If I change PCMs to one that does, it will do exactly what yours is doing since there is nothing installed to tell the PCM that the anti-theft system is working. Many shops and most dealers can reprogram these units. They use the VIN from the vehicle and download the programming from the manufacturer and flash the PCM. Most DIYers do not have the equipment nor the subscription(s) to the manufacturers to get this data.

The passive vehicle protection system will be activated and will disable the vehicle from starting if there is a:

• damaged encoded key.
• unprogrammed key.
• non-encoded key (key has no electronics).
• wiring concern.
• transceiver concern.
• PCM concern.
• module communications network concern.

Reset ? IF your anti-theft system light is flashing when trying to start your vehicle , an the engine doesn't crank , turn , or nothing happens when you turn key , then your anti theft system is at fault ! An trying to reset will not work ,you need to have it checked DTC'S - diagnostic trouble codes ,then fixed ! I suggest you have it towed to the dealer or a ASE certified repair shop !
PATS uses the powertrain control module (PCM) to enable or disable the engine. The PATS module communicates with the PCM over the SCP communication network in order to enable engine operation. The PATS module and the PCM use sophisticated messages in order to prevent a theft. The PATS and the PCM share security data when first installed together, making them a matched pair. After this security data sharing, these modules will not function in other vehicles. The PCM shared security ID is remembered even if the battery is disconnected. The PATS module also stores the vehicle's key identification code, even if the battery is disconnected. There are special diagnostic repair procedures outlined in this workshop manual that may be carried out if either the PATS module or the PCM needs replacement.

When the car is off, a slowly flashing anti-theft light is normal. When the key is in one of the on positions, that light should go off. If it thinks it detects a theft condition, the light will flash quite rapidly and prevent starting. You can also check the mileage readings in the odometer display. If you see dashes instead of numbers, that is a clue that some part of the onboard computer has gone wacky.

You already tried one of the steps that I would recommend (unlocking the door, though that may not be enough by itself. Here are a couple of things to try.

First, pray that this isn't the anti-theft computer gone awry. That is uber expensive to replace. Following that prayer ...

Verify that the battery is fully charged and showing about 12.8 volts with the headlights off and about 12 volts with headlights on. If the voltages are low, try jumping the battery to see if you can get it to start. (A low battery can occasionally cause an anit-theft fault.)

If you have another key, try that one. The chip in the first key may have gone bad. If that doesn't work ...

Disconnect the battery negative cable for 5 minutes. Reconnect, and lock and unlock the doors several times with the remote. Check to see if the anti-theft light is still flashing rapidly. If not, try starting.

Anything more than these steps will need to be handled by a qualified shop. (For example, a wire in the steering column could be damaged by the tilt mechanism, or the computer malfunctioning).

Good luck.

I think maybe the car chip doesn't compare your car , i think you can buy a professional car key programmer for your car .I know this website ,they have different kinds of car car programmer for different car model ,you can have a look

might wana have that theft turned off i had mine turned off on my 99 due to too manny problems i was like wtf so i had it turned off so now u dont need a key with a (chip) if u turn it off saves alot of time! down the road its stupid

Put the key on ACC. Does anti theft light up and stop? If it keep flashing while your cranking then it is the ANTI -THEFT. (by the way the humming noise ifs the fuel pump). If the anti theft doesnt light up during the cranking youll need the ignition module why I say that if it was crank position sensor the fuel pump wouldnt activate. your safe with the ignition module.and if you want it doesnt hurt to replace crank sensor why I say this the year.Its been a while just a suggestion

Sound like ANTI-THEFT system is activated; tyr this procedure to solve it...

Visit this link -->> 1996-Jeep-Grad-Cherokee-Anti-Theft-System

Keep us updated.

Believe it or not ... sometimes, the simplest answer is the solution. I had the same exact problem a while back. Fix? Replace dead battery.