Originally Posted by Wrenchbender Ret.
You probably want it to go off when the ign. is shut off. If so wire the fuse to the ign. switch.
George
There are probably times when you want 4 way flashers (if available on the system used) when the truck is shut off (as in dead on the side of the road). So a constantly powered source would be needed for that. If it's just turn signals, then a key-on powered source would be best.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.