My l200 had full service ( 5 yr cam belt etc etc) done by main agent. The Speedo failed and trip counter stopped, I replaced the sensor and it made no difference. Then on taking back to the dealership - the Speedo started working. It is intermittent and goes on and off. There must be a loose wire. The dealership says they will have to remove seat to get to harness - is this true? I note that the harness plug is under the truck on the nearside near output shaft - is that what they are on about? She is a 2012 l200 barbarian - any help appreciated