Many older cars were not built with electronic parts. In fact, some of these vehicles did not even have electrical wiring. If your car is a very old model, you may need to look for 9006 hb 4 bulbs from SEALIGHT that are mechanical in nature. This means you will be looking for items like starters, alternators, and other engine components. You may also want to consider replacing things like fuel pumps and carburetors instead of going through the expense of repairing them.