What is the light bulb behind the fuse block?
A. This is the battery lamp indicator. If you have a car or truck that has a cavity in the dash for a battery or gen light simply bring the bulb up and plug it into the dash. All GM, Ford and Dodge used a gen light if they did not have an AMP gauge or volt meter. This is another one of the quality features we build into our harness at no extra charge to our customers.