How to change your blank 318is check panel into a better looking 325is check panel. Cheap and quick.
This will keep ONLY the functionality of the 318is check panel, you will not be able to do the full check like a 325is, but it looks more like it belongs there, instead of a big blank rectangle.
325is check panel with SRS light,
hacksaw or dremel,
four small wires,
soldering iron and flux,
and 30 minutes of free time.
Top: 318is check panel, only contains seatbelt and SRS airbag light.
Bottom: 325is check panel, from later SRS airbag version car.
1. Remove circuit boards, snip the tabs on the 318 version
2. Here's what they look like inside with circuit boards out and light bulbs removed.
3. These are the two 325 light locations you need.
4. These are the two locations you need on the 318. You need to jump the power from the 318 board to the 325 board.
5. Cut the end off the 325 board, you don't need the check side anyhow, you can't get them to work. Keep the light panel side.
6. Solder small wires to the and - leads of the 325 board and correctly connect them to the 318 board bulb locations.
7. Trim the back of the 325 board to resemble the 318 back, you need it in order to click it back in the car. Place both boards in the housing and glue or silicone them a bit so they don't shake loose. Here's the finished product. Ugly but you don't see that part anyway.
8. Reinstall bulbs and insert into check panel location. If you did it right the seatbelt and SRS lights should light up just like usual.
Sure, it's not a fully functional check panel, but it is every bit as functional as it was before and looks like it is supposed to.