Renault are know for electrical problems ,if you have a multi meter you need to check the earths using the continuity ,brake switches are known to cause problems,earth on back lights = same ,fuses /relays can suffer wet/damp check the electrical connections with these ,check the conction plug on the brake master cylinder .
I use a dremel type tool to clean up small conctions on my modus then spray them with a silicon spray I bought from tool station ,
One problem modus suffer from is the bulkhead drains either side of the bulkhead they are fitted with flaps cut the flaps off because its them that cause the problems like water on the inside floor ,it also overflows onto the fuse /relay box !
Hope it helps .
Posted on Saturday 19th of March 2016Don't understand this? Ask a question