2 wks ago driving along my speedometer went crazy. The speed, tach , temp and fuel gauges pegged out and the needles went to zero and the speedometer completely turned off. The van stayed running normal and everything else worked except the turn signals which is dangerous and makes me very susceptible to a ticket . Also occasionally the speedometer starts working again and the needles bounce around and then it works fine intermittently . When it works it will lose power immediately and not work for an extended time if I use the turn signal. Don't know for sure but believe the turn signal and cluster are on the same circuit . Last week I had a new Interstate battery installed, still acts the same.