I have a 82 xj550 with a speedometer problem. it went out and I had a new cable put in 3 years ago. worked fine, now it started going in and out, now it doesn´t read at all. last time it worked was last week, it was out when I left home, hit the highway and it kicked in after 10 miles and worked fine. next time, no go and it hasn´t worked since. any ideas?