1997 Chevy Blazer sealed beam headlights stock converted to H4 bulbs. still very dim
Stan Ford is correct ...most retrofits come with relays and wiring to supply the proper voltage to H4's If you follow his instructions you will have a safe properly wired headlight system.
Over time voltage resistance through the head light and dimmer switch will cause a voltage drop and dim lights. use a twin relay to power up the lights , mount the relay as close to the lights as possible , use 4mm wire to the lights and 6mm wire from the battery to the relay with a inline fuse. use the original light wires to engage the relay.
You have to go back to the route cause & time
frame of the problem
Did you check voltage & ground at each lamp connector,
when they first got dim & you started to resolve things?
Why converter to a different bulb?
I don't know the current draw of the oe vs: the H4,but
that has to be considered
Obviously the alternator output would be up there at the
same time your checking lamp connector voltage.
Problem--Voltage Drop somewhere or too much resistance
somewhere,basic OHM's Law
They were dim when they were still stock sealed beams and I was told that H4 conversion was the only way to get them bright as theis was a common problem on blazers. It didnt make a difference. It has a brand new battery and alternator.
I used a projector headlight casing that looks like a stock sealed beam unit, H4 Sylvania Silverstars or something like that. Ive been fighting this for two years. When I bought it
I own a 1984 S10 Blazer for 29 years,so much for what you were told I have no issues
I was told the 95 to 97 2 doors (4 door came with composites 2 doors didnt) always had a problem. Ive been all over forums and most people that experience the problem dont know what to do. Im so frustrated Im thinking of offing the car, but I love it so much.
Stay with the form thing & see if you can find factory or mfg bulletins going back that far & resolve yourself As is said if you good with electrical you can figure it out,someone surely has in the past as a hundred thousand vhe have the problem as you said. Do the voltage drop testing I suggested. They do work,just dim
Forgot---you can not work on electrical without a wiring diagram The answer is in there if you know what your looking at Poor design I suspect,there is a flaw in OHM's Law as I said Find it & change what was built on the assy line
I found this complaint on a recall website but I dont have any idea what it means:
Try going to a repair shop that has a data base & see if they will look for info in there or if they have ever heard of the problem,sort of act like your not aware of the issue & don't give out info at all about knowing or researching it
THE DESIGN OF THE DIFUSER DOES NOT PROVIDE ADEQUATE LIGHT ON ROAD SURFACES CAUSING POOR VISIBILITY
That sounds like a plan. Thanks a million Peter.
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SOURCE: how to replace low beam headlight bulb on 1999 chevy malibu
just have a philip screw driver, remove the screw, pull out the light and take the light to the nearst aurozone and they will give you the right light, and put it back the same way.
SOURCE: how do you adjust the headlights on a 1997 chevy
The adjustment screws/nuts should be located either on the top of the headlamp assembly,
behind the headlamp assembly, or near the frame rail by the radiator
support.
You will have vertical adjustment screws for each independent beam
(separate highs and separate lows, but will be same screw if highs and
lows are the same bulb). You may also have additional horizontal
adjustment screws as well
Park
your car on a level ground 30 feet from a wall and measure the height
from the ground to the bulb and mark on a wall (do this for highs beams
and low beams if the bulbs are separate, if highs and lows are the same
bulb, only do it for the lows)
For Low Beams: If the headlights read VOR, then
aim the brightest part or cutoff part just below the mark on the wall.
If it says VOL or nothing, aim them 2 inches below the mark on the wall.
For High Beams (if separate from low beams): Aim the headlight directly at the line you marked on the wall.
SOURCE: 1997 Cevrolet blazer, dim headlights even after
A dim headlight after replacing would indicate a bad ground on that side. Check the black wire running from the headlight and try following it back to where it grounds. Or you can run a ground wire direct to the headlight and make sure you ground it to bare metal, or the negative post on the battery.
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