My speedometer in my 94 Wrangler is not working and the lights to the speedometer does not work. All the other gages and tach are on and fine. I Disconnected the speed sensor and checked with a meter. Starting from the left - the first pin read 5 v, the second pin on reading and the third pin read 7.5 v. I pulled the cable end out and reinserted and rehooked up the electrical connection. Still no reading or lights on the speedometer. Any suggestions on something else to check?