I have a 1989 Ford F-150 and my turn signal fuse keeps blowing every time I turn on the ignition switch. I don't touch the turn signal switch, just turn on the key and the fuse blows. I changed the ignition switch and traced the wires the best I could and can not find the problem. any suggestions would be appreciated. thanks

 

higher amp fuse? Are you sure your using the right rating?

 

You might also try checking the lights associated with your turn siginal/hazard lights (front and back). I once hooked an old camper up to the electrical system of my truck. Every time I turned on the trucks lights, I'd blow my dashboard lights fuse. It turned out one of the bulbs was badly shorted.

Hope this helps.