Gryphon not operating under ambient temp of 40 deg.

[f150ian]

The battery was replaced last spring, and the truck currently starts strong, but I guess I could have it checked. I would assume since my battery is charged that my alternator is working. I drive about 40 miles a day with no battery light; the gauge shows plenty of juice. Certainly wouldn't hurt to check though.

I'd like to invest in a multimeter, maybe now is the time to do it.

I think if I probe the injector terminals the multimeter will either show open or give me a resistance.