My 86 bronco 2 has some elctrical problems, and I am not sure what they are. If you are driving at night the lights are dime untill you hit the gas and get the rpms up. The rest of the car doese the same thing. Such as the heater wipers ect.
do you think its the altenator, voltage regulator?
go to your local auto zone or mechanic and get your alternator and battery tested this is a free service they offer and go from there its probley just a battery or loose alternator belt