It would sure be helpful for a little more info. Does the fuse blow when the headlights are operating or even when they are off? That's a 15 amp fuse (I believe) and blowing it means a heavy current draw if it blows when the lights are off. If your instrument panel was drawing that kind of current, all you'd have to do is follow your nose and the smoke to the problem. On my older tractor, the light switch is powered by fuse #4. Fuse # 4 supplies power to the instrument panel and to the headlight relay's coil. Fuse #7 only powers the headlights. When the headlight switch is turned on, power from Fuse #4 goes to the instrument panel for night illumination and to the headlight relay's coil. When the coil energizes, it's contacts route power from Fuse #7 (the far right fuse) to the headlights only. If your Fuse #7 is blowing only when the headlights are ON, then you probably have a defective headlight, connector, or the headlight relay. If it blows with the lights ON or OFF, then the problem is probably the headlight relay shorted or it's socket shorted. Sometimes mice make a home under the cowling where the relays are located and you can't see them from above. You have to remove the cowling under the steering wheel. Knowing the exact timing of the fuse blowing and operating conditions are important to troubleshooting.
