TRY TO START AND THE HORN SOUNDS, BUT WILL NOT START THE CAR.
SOURCE: horn blowing and car wont start
Same problem on 98 Jetta at about 9 yrs of age. Wiring harness was an expensive job. Dealer replaced all wires going to doors so that alarm isn't mistakenly triggered by opening doors. Dealer offered to remove alarm for a few hundred dollars, but couldn't assure us that the key fob would still open the door locks. Who wants to give up power locks? My hunch is that wire in driver's door breaks with flexing over 9 years. Could consider replacing short stretches of wire in hinge of drivers door if you're handy with a soldering iron.
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