Kain
3/4 ton status
Look on Amazon with that part number see if you can get it cheaper, even eBay
love my j.w. speaker units . did a write up here few years ago .
Look on Amazon with that part number see if you can get it cheaper, even eBay
Hmm, apparently not made in 4x6 unfortunately.I'm running this set that looks similar to your link but at $85/pair (different size) and they are an excellent upgrade.
2022 Upgraded Osram Chips 180W DOT 500% Bright Anti-glare H6054 5x7 7x6 Led Headlights,DRL Turn Signal Hi/Low Sealed Beam Compatible with Jeep Cherokee XJ Wrangler YJ Ford Chevy GMC Toyota Nissan Pair https://a.co/d/ffK7IIm
So have you done the measurement yet? The only upgrade that won't need the relay upgrade will be a nice LED setup, as it will have a current regulator (and they draw less current than halogen, so less voltage drop). I was just looking for numbers on this (sorry couldn't find any), but I remember getting like 40% more power through the lights, since you go from like 10V at the bulb to 12V.I have not tested the voltage at the headlights now, but if the voltage drop is that bad (my alternator also puts out 14+) then perhaps I better see what the drop is now. I'd prefer not to have to change headlights at all if I don't have to.
So have you done the measurement yet? The only upgrade that won't need the relay upgrade will be a nice LED setup, as it will have a current regulator (and they draw less current than halogen, so less voltage drop). I was just looking for numbers on this (sorry couldn't find any), but I remember getting like 40% more power through the lights, since you go from like 10V at the bulb to 12V.

So your logical conclusion is drawing 10-15A through dozens of feet of small gauge wiring through the fusible link, bulkhead, fuse panel, column switch, and a half dozen 30-year-old contacts produces no voltage drop?My alternator pushes about 14.5V at all times, I've tested the wiper motor and seen the same voltage there, so my expectation is that the headlights do as well.

So your logical conclusion is drawing 10-15A through dozens of feet of small gauge wiring through the fusible link, bulkhead, fuse panel, column switch, and a half dozen 30-year-old contacts produces no voltage drop?
EDIT: you had 14.5V from wiper motor + terminal to wiper motor - terminal throughout the stroke of the wipers? Please post pics.![]()
At full load, to include wipers (excepting stalled tailgate motor), headlights on high, heavy duty heater on high, and fuel injection, my alternator has no problem maintaining 14.5V through the fuse panel.
I measured voltage from the wiper motor + to the master cylinder as ground.
The factory wiring is unmolested on my truck, and while it may be 30 years old, it's been assembled and disassembled many times since then, the terminals being cleaned and greased if they needed it.
The factory headlight wiring is within the realm of "correct" in terms of load, I have a very hard time imagining voltage drop to the headlights is more than 2V, which would still put them at 12.5V.
I'll measure the headlights directly though, I'm curious to see what they are getting for voltage. I have yet to see a halogen, even on newer applications, come close to what the modern LEDs can do. But if I need to, I'll crank up the voltage to the Halogens and see what, if any, difference there is. I'm not going to say the LEDs are leaps and bounds better without making sure the halogens have as fair a shake as I can give it.
Since halogens also lose brightness over time, if I have time I'll use new halogens to compare, not what's been on there for years.
You are working with theory pretty well for the voltage drop. You will measure probably 12.5v at the headlight with the engine running.
The point is if you can give your headlights actual full system voltage with the engine running even stock halogens will be brighter.
Your wiring may be clean and in-molested. But the circuit is horrible since it makes a complete lap from the battery, through the junction block, headlight switch, dimmer and back through the junction block and then finally to the headlights.
It really don’t matter if it’s what you got or brand new wiring. The circuit is inefficient.
Put relays in and you will get only .2v drop to the lights meaning they will see 14.3v if the alternator is putting out 14.5v. Your low beams on relays will be brighter than the high beams without relays.
It’s pretty simple the more voltage you have at the light the brighter they will be. I proved it on my ‘75 when I made my own relay kit. On my ‘91 I used the LMC relay kit. Same result.
So I hesitate to say this, but Pirate had a huge headlight thread. Lost of B4 and After shots. I seem to recall the same user trying many different systems, same truck same no moon street .
I’m running Philips 4x6 led lights on my 87. They are plug and play and provide tons of light. I think it was around $200 for the low beam pair.The problem with even the Hella's is that they are more than I really want to pay for such limited use. Gets me into the "mightaswell" territory for full blown LEDs. Which I'd do in a heartbeat, except the $1000 price tag.
I have not tested the voltage at the headlights now, but if the voltage drop is that bad (my alternator also puts out 14+) then perhaps I better see what the drop is now. I'd prefer not to have to change headlights at all if I don't have to.
I was unaware that beam pattern/cutoff was a potential issue with the H4 design. I suppose pretty naive to think that it takes no skill or effort to make an acceptable housing. And there is no point in swapping if I'm not going to end up with a guaranteed better result than I started with.
Ugh, those LFRB120 Holleys look better and better at ~$360 for two. If they are as good as it seems they are, no real reason to need to swap all four over.
The power is proportional to the square of the voltage. So 12.5 to 14.3 is 31% more power, even though it's just 14% more voltage. (Well, almost. A filament bulb increases in resistance the hotter it gets.)
It will be interesting to see what's getting through that circuit to the lights. Easy to test, just wish I could now when the weather is decent.