My battery has over 12 volts but, when i activate the key fob it goes down to 6 volts what could be the problem?

You have to diconnect the battery cables wait 5mins. Then reconnect them when the alarm or horns start beeping use your key fob to take it out of theft mode if you don't have a key fob buy one and program it into the system by turning the key from off to on real fast about 6 times or until you hear the door locks cycle then press any button on the remote control and it will be programmed into the system you can do this with 4 remotes but you must be fast you only have 10 seconds before the system times out then you have to start over again and all remotes must be done at the same time otherwise the first ones get erased so 4 at once ok post back if you need me in comments good luck stephen

No, it may not be easy to fix? But it would be very hard to diagnose something that odd and electrical. For example, it could be in the main RF receiver constantly activating the solenoids. But it could also be an adjustment of a solenoid and there are 5 of them.
But what I would suggest is to remove all 5 interior door panels, (remember the back hatch). And then try the lock on the fob. If one seems to stay on or not go on, such as shorting out, then quickly remove the wire from the offending solenoid. Be prepared also to remove the battery cable if you have to. That can active the radio security though, if you don't know the code. And if there is a short, you can tell with a battery cable off, by putting a test light between the cable end and the battery post. A volt meter will not work because there are several things, like the clock, radio backup, emission system, etc, that will always draw 12 volts. But they draw very little current, so will not brightly light up a test bulb.

The battery wire goes to one side, the other goes to the starter (if gas) or the controller f/r switch (if electric). Any other wires that control 12 volt accessories that are "switched" will go to the same lug as the controller f/r switch. Wires that control accessories that can stay "hot" regardless of the key switch will usually go directly to the batteries. Be careful that you hook to the proper voltage on the batteries. They are wired in series, so two 6 volt batteries wired together will give you 12 volts...........any two batteries, as long as the cables connect them together. If you have 12 volt batteries and a 12 volt accessory (like a stereo or electric horn), you need only to wire across one battery.

Battery is probably bad, 12.35 volts is only a 50% charged battery and this is a surface charge you have tested so it probably is a no good battery and as soon as any load is put on it it drops further. Replace it with an HD AGM battery. Otherwise recharge it and do a load test on it and see what results you get then

1 long push on the remote turns it on and 2 quick clicks turn it off.
Disarming function may require practice. The key fob button must be pressed twice within 1.5 seconds to send the disarm command. The action is very similar to double-clicking a computer mouse. Light quick taps work best; very hard or very slow taps are less likely to work. The key fob sends a RF signal to activate all remote TSSM functions. The left front turn signal switch wire serves as the vehicle's antenna. If the TSSM does not respond (no confirmation at arming/disarming system) or responds weakly (limited range, won't consistently arm/disarm or synchronize),

Verify key fob battery voltage is at least 2.9 volts. Replace the key fob battery every 2 years.


Interference from physical surroundings may affect RF transmission. Place the fob next to left hand grip and disarm with two clicks or move the motorcycle to a new location and try again.

Check for damage to antenna wire. Does left turn signal work?

After a battery disconnect, the TSSM will not enter the configuration mode on the first attempt. All attempts to assign a fob or enter the configuration mode will require at least two attempts.

The TSSM system uses batteries in the key fob and siren. These are the only parts requiring periodic maintenance.

Battery Replacement
Open the key fob case, place a thin blade between the 2 halves of the case, slowly twist the blade remove and replace battery positive + side down, use a Panasonic 2032 or equivalent, align the case and circuit board, snap the case halves together, while standing next to the motorcycle, press and hold the key fob button for 10 to15 seconds until the security system responds with two turn signal flashes/siren chirps.

Put key in ignition.
Press unlock button on key fob.
Immobilizer should now recognize it, if it was original fob but car or fob battery was changed or is now low.

Saabs are particular about batteries that are otherwise good, but just below 12 volts.

Loss of programming maybe or a faulty keyless entry module.

hi this is the battery in your key remote, it is saying it needs to be replaced soon or it will not work so just replace the battery in the fob, be sure to do this in 60 seconds or you will need to re-program the fob, just in case you do not get the battery in, in time, here is how to re-program it as follows Turn the ignition switch to the ON position using the first key.
Press the LOCK button for 10 seconds.
Remove the key and wait for 10 seconds.
Check the Plip key operation.
Repeat for second Plip key if required.
Turn the ignition OFF
hope this helps please comment and rate thanks

To replace the battery:
1. Press the button to flip out the key.
2. Turn the key fob so the metal key stick out to the right and the channel that the key fits into is facing you. (The VW logo on the fob will be facing up)
3. Look closely inside the channel. It is split vertically. On the left hand side of the vertical split, it is also split horizontally.
4. Insert a flat blade screwdriver into the horizontal split and twist. They key fob will come apart, revealing the battery.
5. The replacement battery is a 3 volt CR2032 'button cell' and is commonly available.
6. Replace the battery with the + side facing down.

If you want to solve your problem, click on the link I attached
https://www.reliable-store.com/products/jaguar-xj6-1986-1994-workshop-service-repair-manual