I have a 15 yr old car and the car headlights arent very good even with the high powered bulbs I put in. People have said often the wiring deteriorates so the voltage drops to the headlights.
How do I test this, I have a digital multi meter.The headlight bulbs are the ones with the 3 prongs (type 472 I think). What readings should I get?
How would I rectify this if the voltage was low, have to re-wire it?