My battery is dead in my Saab 9-3, I want to manually open the trunk.

SOURCE: 1995 jaguar xj6 dead battery and can't open trunk. please help,

I f it is like the XJR, the cig lighter is electrically switched and will not work. Find the hot point and and ground in the passenger side heelboard. The ground is two wires together scewed to the body an the hot point was a bolt attacted to a large wire and covered with a black rubber boot.

SOURCE: Dead battery & can't open trunk to charge battery

Simple solution - your tbird has a mechanical trunk lock behind your driver seat on the face of the package shelf. Just use your key to open it.

SOURCE: Mercedes-Benz 320clk coupe 2002 with dead battery

Posotive can be found in hood driver side next to fuse box. It is a small rectangle box. You can hook negative to any solid ground on the car.

SOURCE: battery is dead and can't open the trunk, even manually

Starter motor on this car is imposible to get to..better find the post forward of the drivers side fuse box in the engine compartment where a bunch of wires come together. This is a positive terminal attach red jumper here put the negative jumper on any bare metal bracket of the engine

SOURCE: 1999 porsche 911 how to open hood with dead battery

The cheapest way to get around this and get enough voltage into the system to open the hood is to purchase a cigarette lighter extension (about 3 feet) and cut off the female plug on the end. Strip the 2 wires back a few inches and attach one to the positive and the other to the negative on a set of jumper cables. Attach the other end of the negative jumper to a battery. With the keyless entry in hand, touch the positive cable to the positive terminal on the battery and press the unlock button until you hear the car doors click. Once it clicks, you should be able to use the hood latch to gain access to the battery.