depending on the year of your espace i have a 1998 R reg and the lights for the dash take their power from a printed curcuit board which can very easily get damaged and stop the current reaching the bulbs.
Another downside to this is that the connection between the bulb holder and the curcuit is very narrow so any play in the bulb holder and it will work one minute then be off the next.
I have secured mine with insulation tape to stop then from moving around. Which is just a short term fix!!
Garry, November 2008