Are they LED or regular bulbs? They will all work in any of the units, but if they are LED they will only work one way round. If they are bulbs then it could be a dodgy connection on the circuit board that they make contact with.
il try that, if not il look about for a MFD and stalk.. im guessing its not too hard to wire in?
it might not help that my battery is ni on dead, but it made it light up before i changed the bulbs, then i ended up getting locked in the van as the central locking threw a spazzo at me lol. not what i need as doors not opening now might fail the mot tbh lol.
just remember to wire each earth down seperate to a single earth point as when i did mine i wired them all to 1 wire then down to the earth point and i have a few things not working properly like the temp, hopefully ill get it in and working properly soon, then i can get it updated to the proper software to get the range and speed working
If you follow instructions in previously mentioned guide, everything can work like in original...
Mine is showing only outside temp, average speed, average consumption, range, stopwatch.... I didn't connect rest of the wiring ( light errors, washer fluid level, coolant... ) because i don't have these installed on my car