New to the forum and new to diesels in general. Bought a 85 Ford F-250 with the stock 6.9. I read a few threads about the pulsing lights. I’ve replaced the alternator and voltage regulator but I’m still getting the pulsing lights at higher rpm but goes away at idle. I’m going to try cleaning off the connects again tomorrow to double check but I find this odd about the situation. When I have the headlights turned on I notice that the engine runs hotter and gets close to overheating and my suspicion is the alternator is generating such a bad parasitic draw that it’s making the engine work harder than it should and heat up. Once I turn the headlights off I can immediately see the engine temp start to creep back down to operating temps. Is this something that anyone has seen with pulsing lights?