Hello Michael Rosepal,If my headlights are dim or go out when I put the high beams on, it would be a ground issue. Yes?
When I was reinstalling the front engine harness I missed a ground. The good thing is I cleaned the con at the firewall. Thanks for the help!Hello Michael Rosepal,
First let me say you did a really nice job on your car. About the headlamps being dim, well that could be a bad ground or a bad B+ feed to them: It could be loose or corroded connections at the firewall connectors, a bad hi-low switch, dirty circuit breakers inside the headlamp switch and of course the one thing I noticed is that Ford didn't really use heavy gauge wire for the lamps and are what I would call dim at the best of circumstances.
You can run relays with inline circuit breakers for the lamps triggered from the original headlamp wires to alleviate most of the conditions I mentioned. I did this on our '68 XL and '79 Power Wagon, plus I used 100/140 watt lamps to replace the original miserable sealed beam headlamps. That's 200 watts on low beams and 560 watts on high beams! They are ridiculously bright in high or low now and I love them. I am using the original 1G 55 amp alternator and external regulator. The charging system only struggles with the high beams on, the air con on high and sitting at idle. However as long as you are moving the original charging system has no problem holding 14.2 volts at the battery.
Food for thought.