LED Car Clock (630-0833) Troubleshooting Faxback Doc. # 7581 If you display can't be turned on, check the following: 1. Open the fuse-holder (connected to RED wire) and check fuse inside. If the fuse is burned out, use a 0.5 Ampere fuse to replace it. 2. Check electrical wiring, make sure the wiring connections are correct. If the trouble still exists, refer servicing to qualified service personnel. (LB/all-9/19/94)