It should be ok. Here is the caveat, however (and the reason I'm still writing about this is I don't want there to be a single surprise discovered by anyone out there): if all is well and the dash lights are the solitary draw on it, everything swims along nicely. If for any reason something happens to ground one of those dash light wires (a wire break, somebody crudely added an uninsulated connection when they wanted to add a light wire for their tachometer, vacuum gauge, radio, etc), then the coil will heat to a glowing red tout de suite. It looks just like a miniature hot plate. A lot of amperage flows through the headlight switch and this resistance wire takes just a blink of time to glow in the case of a short. Yes...there is a circuit breaker, but there are 3 things about that: the coil might glow before that breaker activates, one never knows if the breaker is working correctly until it is needed and the breaker re-sets itself so the coil will keep glowing/not glowing as long as the short is there. While working on the fuel sender project, I became curious about how little voltage & amperage would be needed to make resistance wire glow...for anyone who doesn't know, this wire is used to make smokeless tobacco units. Turns out a common AA battery will make a 6 inch piece of wire hot enough to blister your fingers. That battery is 1.5v and milliamps of power. I hooked that same piece of wire to a 12v power supply I use (12v dc with 1 amp of power) and with a direct short circuit, the wire turned cherry red in about 1 second.
