inadvertantly the battery was connected incorrectly, which resulted in three burnt fuses, now nothing happens, fuses replaced still nothing if I connect another battery under the hood the engine starts display says no acl no trac
need help to figure this out. as soon as I disconnect the battery the engine stops.

 

Wait for a mod to move post to correct forum...

 

Welcome to the forum Peter,

I've moved your question from General Tech Help to X350 forum. Members here with the same model will be able to help.

Please follow this link New Member Area - Intro a MUST - Jaguar Forums - Jaguar Enthusiasts Forum to the New Member Area - Intro a MUST forum and post some info about yourself and your vehicle for all members to see. In return you'll get a proper welcome and some useful advice about posting to the forum.

Graham

 

disconnecting the battery with the engine running would not be something I would ever like to do with the delicate electronics these Jags have.

I would disconnect the battery, check all fuses, do the system reset by touching the negative and positive cables together for a minute, then reconnect the battery using the correct battery connection procedure. Described in the workshop manual.

 

The engine quitting with the battery leads disconnected infers that the alternator or wiring is damaged. The fuses do not always blow quickly enough when connecting a battery incorrectly to save 100% of the car.

 

Possibly you did not damage much. Get a good battery, clear codes, and drive it. May reset and be fine.

 

Be prepared to have to replace the alternator; there are rectifying diodes in it that prevent reverse current going through it but by reversing the battery polarity they will act like a complete short circuit between the battery terminals; that's almost certainly what blew the fuses (I'm guessing they may have been the 'mega-fuses'). The diodes themselves and the charge control circuits within the alternator will almost certainly have gone 'phut'.

As to all the control circuits etc in the various boxes and stuff in the car, you may be lucky, they may have reverse-polarity protection.