2004 Mercury Grand Marquis Key Fob Battery Replacement Instructions
If your auto keyless entry remote is not unlock doors well, the battery likely must to be replaced. Yes, it is possible to change the battery in your key fob by yourself. All you need is outlined in this post.
What kind of battery keyless entry remote usePrior to disassembly key fob check all that you need: one CR2032 battery and flat head screwdriver.
- flat head screwdriver
- 1xCR2032 battery
Step by step guide
A coin battery installed in the your keyless entry remote. Delicately try to disassemble your key with hands or flat head screwdriver. Remove CR2032 battery with flat head screwdriver.
Change old battery with fresh one CR2032. Every battery has a negative and positive side and if you put the wrong connector down, the current cannot go into your circuit board and make it work. Check polarity on battery, by "+" mark.
After the new battery installed, check key fob by pressing buttons. If all functions works, assemble your keyless entry fob's case in reverse order.
The last thing to do is put your cover back on fob. Accurately try to assemble the two halves in place by hands from top to bottom. If your key shell tightly closed, we done. If not, repeat the last step.
How to replace the battery video instruction
DIY: Ford Keyless Remote Battery Replacement & Disassembly