I have a 95 xj has no power to the key or fuse box under the dash. I have a good optima yellow top cleaned all cables and post on batt. Starters new and just replaced the ignition switch. Started a couple weekends ago no problem. Went to pull it off the trailer turned key and nothing. Tried again and it would cut in and out. If I take power direct to the 15 amp mini fuse for ignition it starts with the key switched the relays a round and still no luck.