[Tommy]

Cobradad,
If the fuse blows within a hour or so, try this to narrow down the problem. On a nice cool day when you're not likely to even need a fan, disconnect the fan relay and drive the car. If the fuse blows again, it must be the only other device on the circuit. If the fuse doesn't blow in the usual time, reconnect the fan relay and see if it blows. ... One more thing to consider. It's possible that one of the two devices is drawing more current than it should, but not enough to blow the fuse until the other device activates at the same time. For example, the fan relay could be drawing too much current, but not enough to blow the fuse until the added load of the turn signal kicks in. That would make it look like the turn signal is the problem when it isn't.