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mchopra

Front hood locked, battery dead, tried to pop trunk with fuse box charging. No success. Please advise.

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My 2004 911 C4S has been in the driveway for 10-15 days and it locked and armed itself. I have had this happen before, unlocked the drivers door with the key, took off the fuse box cover, pulled the red positive charging junction, hooked up a battery charger to that and to the lock mechanism on the door. It should power the car to allow me to unlock the front or rear hoods, no success. Now how do I open the front trunk to charge the battery directly. The battery is 6 months old. Thanks. Manny

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Use a booster pack or a real lead-acid battery (or hook it up to another car's battery) instead of the battery charger. It takes a few amps to unlock the hood/rear lid. Most battery chargers can't supply. The smart chargers are worse for this purpose because they don't even output power if they detect the battery is too low.

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Steel the battery out of your wife's car and with jumpers you're in like Flynn...  Also, there are quite a few posts on this subject. There is a search box at the very top of this page...  

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8 hours ago, mchopra said:

My 2004 911 C4S has been in the driveway for 10-15 days and it locked and armed itself. I have had this happen before, unlocked the drivers door with the key, took off the fuse box cover, pulled the red positive charging junction, hooked up a battery charger to that and to the lock mechanism on the door. It should power the car to allow me to unlock the front or rear hoods, no success. Now how do I open the front trunk to charge the battery directly. The battery is 6 months old. Thanks. Manny

Hey Manny I was a tech for Pioneer Centres a while back and during P.D.I. inspections(Pre-Delivery Inspection) on the list of tasks was to free up a looped wire rope less than a 1/16 in diameter located behind the drivers H.I.D. headlamp and lay it along the side of the lamp with the loop facing forward between the lower lamp housing and front bumper skin,lay a clean cloth on the bumper skin grab a good light source pry gently look for that loop take a hook tool grab tha loop gently pull it forward this should unlock your front bonnet accessing you to the battery....Good luck 

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Or go to Home Depot and but a small sealed 12V battery from the electrical department, usually purchased for use in an emergency exit sign.

 

Stop by the electrical area to purchase 5' or red  5' of black 12 ga wire, a pair of alligator clips, and two connectors that fit the terminals on the battery.  I think I spent $35 or so, and a second 12V auto battery is heavy, and any leaked battery acid will damage the floor mats.

 

Connect the red to the fuse box terminal (I think it has to be protruding from the fuse box to work), and clip the black clamp to the driver's door hinge or travel stop.  If the alarm was set when you locked the car, don't be surprised when it goes off as the auxiliary battery is connected.

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What was finally diagnosed was that the drain plugs were clogged, and this caused water to get in under my drivers seat, and this fried my central locking system.  I had this replaced with 2 keys, and its fully functional now.  How do I stop the drain plugs from getting clogged.  The car is outdoors in the shade.

 

Thanks

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1 hour ago, mchopra said:

What was finally diagnosed was that the drain plugs were clogged, and this caused water to get in under my drivers seat, and this fried my central locking system.  I had this replaced with 2 keys, and its fully functional now.  How do I stop the drain plugs from getting clogged.  The car is outdoors in the shade.

 

Thanks

 

You need to blow them out with compressed air on a regular basis.

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Had same problem, removed right front wheel, pulled back plastic well liner found the cable, then had the alarm module refurbished and ordered the waterproof box from the ECU Doctors but when out of country pull a trickle charger into cigar lighter just be be safe.

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Thanks for the idea for the waterproof case, checking with dealer if he will install it for me. Ordered a car cover for the car, will start to check the drains after heavy rainfall also. Thanks everyone. 

 

Manny

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4 minutes ago, mchopra said:

Thanks for the idea for the waterproof case, checking with dealer if he will install it for me. Ordered a car cover for the car, will start to check the drains after heavy rainfall also. Thanks everyone. 

 

Manny

 

Check your drains before it rains, not after when it is already too late...…………..

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