Got the old Ford GP lights in the mail yesterday. Changed out the conventional bulbs to LED bulbs. The 5007 bulbs were available in LED form and so was the 1157, changed to 1157R for the tail lights. Took two Duracel 9 V batteries and snapped them together one positive to one negative. (one upside down to the other. DON'T snap all 4 together) . Again one positive to one negative. Then use two snap connectors for 9V batteries on one of the unused terminal of each battery. You only need to use one positive on one end and one negative from the other free connection on the other battery. Take one wire from the black on one side and red from the upside down one. Use them to connect to the terminals on the light. The 1157 light for a car tail light has two hot terminals and the metal frame on these is used for the black negative terminal. Clear as mud? Sorry, will try to get a photo for you in the next few days. I'm retired so I'm really really busy. I have done quite a bit of nothing but have so much more (nothing) to do. the Be Well, SS, otherwise known as Rusty Zipper on other forums.