Volvo 940 wont start after recharging battery, anti theft wont disengage

When you try starting the car does the anti-theft light flash fast or is it on steady ? Did you try a different key ?

It is hard to give a definite answer because I don't know which and how many wires were damaged...Anti theft can be a real HEADACHE.....You can begin by disconnecting battery cables..Use your VIN number for parts,Get new ignition with a programmed factory key from dealer only.....They probably blew certain fuses and or relays when this happened...Or maybe not..Install new ignition connect battery cables..,turn switch on just to check for bad fuses and relays...Disconnect battery again...replace any fuses blown...Connect battery again...( Each time you disconnect battery it resets the computer system and should clear anti theft codes..)..make sure all doors are unlocked by using door remote key fob....Now see if vehicle will crank..If all is done correctly it should start...However I don't know how much damage was done.....It may possibly be too much work to totally disengage anti theft....You could start with removing all fuses and relays related to anti theft but disconnect battery before...I DO NOT RECOMMEND trying to disable the theft system.....You may create more headaches that you want.......Begin by trying what I described just to be safe...!!....

A volvo dealership can tell you , or if you have the owners manual , and are lucky , you might find that the original owner wrote the code down in the book somewhere.

Cadillac dealer can by pass that anti theft module

I am a volvo tech and your problem is fuel pressure ralated and i had same problem in 1995 850 turbo and the fuel pump was the problem and a used one is around 35.00

Hi!
Start by charging the battery completely. Then, start your car and while running, remove the NEGATIVE battery cable from the battery. If the car dies, your alternator is bad. If it keeps running, reinstall the battery cable and turn the car off. Check for something that's on that would drain your battery like a light in the trunk, glove box, etc. that wont shut off.

There is a button on the side of the "shifter" knob that engages and disengages 4th gear.

The radio code is an anti-theft precauction, we do not have access to them, there is a web site that will sell the info to you, radiocode.com, the dealer can also provide this info.

Mike. Please be sure the battery is good. and full charged.
OR if you have an other one, change.