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david craig
david craig, Auto Mechanic
Category: UK Car
Satisfied Customers: 3124
Experience:  owner/mechanic at 3D Automotive
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Flahing lights on unlock engine turns over but runs for just

Customer Question

flahing lights on unlock engine turns over but runs for just a second - AA called out yesterday and did a battery reset and discharged the capacitor and the car unlocked without a problem and started but problem happened agian after getting home. Car is a 1996 E320. I'm thinking maybe key fob battery low?
JA: How old is the battery? And have you tested it with a voltmeter?
Customer: car battery looks new. key fob battery ran out last month and I replaced them with batteries from a fob from an old car
JA: What is the make/model of your car?
Customer: 1996 E320
JA: Are you fixing your E320 yourself? What have you tried so far?
Customer: Tried battery reset / discharge capacitor which got me home but can't start car since
JA: Anything else you want the mechanic to know before I connect you?
Customer: I just want to know if there is any quick test I can do (not being very mechanically minded) to rule out needing a module replacement. If new module is needed I'll have to replace the car
Submitted: 8 months ago.
Category: UK Car
Expert:  david craig replied 8 months ago.

Hi Im David, is the security light going out when trying to start the vehicle?

Expert:  david craig replied 8 months ago.

do you still need assistance?

Customer: replied 8 months ago.
Hi David,Replacing the key fob battery fixed the problem. I think when the fob battery is low it just sends the unlock signal without completing driver authorisation.RegardsPaul
Expert:  david craig replied 8 months ago.

very good Paul. glad to hear it