Headlights... hi beams work, lows do not. - JeepForum.com
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post #1 of 25 Old 08-12-2019, 05:19 PM Thread Starter
BChamberlin
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Headlights... hi beams work, lows do not.

Just put in a new switch, no change. I can’t really believe both headlight low beams are bad but then again, I just got this thing a couple days ago.


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post #2 of 25 Old 08-12-2019, 06:43 PM Thread Starter
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Read it could be the dimmer switch. I see where it is under the dash. Damn, what a tough spot. Any suggestions for reaching this?

I hate chasing ghosts. Never mind repairing stuff but damn I’ve been on a bad streak lately with stuff going wrong that’s not easily identified.

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post #3 of 25 Old 08-12-2019, 08:41 PM
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Do you have a multimeter?

Is power going to the headlights when low beams are on?
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Stop whining about the 'ride' - If your YJ ain't wrangling your soul free, then might I suggest you buy a stationwagon... at least you can fit all your bull**** in the back.
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post #4 of 25 Old 08-13-2019, 05:44 AM Thread Starter
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I do have one but I’m not the most experienced with using it.

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post #5 of 25 Old 08-13-2019, 06:04 AM
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Quote:
Originally Posted by BChamberlin View Post
I do have one but I’m not the most experienced with using it.
Set it to 12v DC turn your head lights on. Put the black lead on battery negative and put the red lead on the socket that the tabs for the bulb go. You should have 12v on one. One is ground one is low beam power and one is high beam power. If you have your lights on and set to low mean you should see 12v on one of the 3 spots.

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I gave the Jeep the required offering of $$, sweat, and blood, and everything works fine now. -- Jim
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. It started with a $200 axle, and a few thousand dollars later I was done :)
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diagnose the real issue before you start going all Obama on it - spending mad cash you'll need for other important things.

Ask me how I know...
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this is also my second set of RC springs this year. I'd rather spend the money again and get something that will last.
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post #6 of 25 Old 08-13-2019, 06:05 AM
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Do you have a multimeter?

Is power going to the headlights when low beams are on?
I was about to ask the same till I saw this. My multimeter has become one of my best friends
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1995 YJ. 2 inch BDS Spring lift. 1 inch shackle lift. 1.25 inch JKS Body Lift 33x12.5x15's. Engo 10,000 pound winch.

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Originally Posted by Magnum View Post
I gave the Jeep the required offering of $$, sweat, and blood, and everything works fine now. -- Jim
Quote:
Originally Posted by ldso View Post
. It started with a $200 axle, and a few thousand dollars later I was done :)
Quote:
Originally Posted by Luuca View Post
diagnose the real issue before you start going all Obama on it - spending mad cash you'll need for other important things.

Ask me how I know...
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Originally Posted by Overhead View Post
this is also my second set of RC springs this year. I'd rather spend the money again and get something that will last.
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post #7 of 25 Old 08-13-2019, 11:26 AM Thread Starter
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Quote:
Originally Posted by bruinjeeper View Post
Do you have a multimeter?

Is power going to the headlights when low beams are on?
So just turn the low beams on, pop the good and stick a voltmeter on the headlight terminals?

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post #8 of 25 Old 08-13-2019, 01:06 PM
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Quote:
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Quote:
Originally Posted by bruinjeeper View Post
Do you have a multimeter?

Is power going to the headlights when low beams are on?
So just turn the low beams on, pop the good and stick a voltmeter on the headlight terminals?
Siva explained it above. Ground out the black wire on your multimeter. Try it in all three wire ports at the headlight if you don't know which colour feeds low beam into the headlight

Stop whining about the 'ride' - If your YJ ain't wrangling your soul free, then might I suggest you buy a stationwagon... at least you can fit all your bull**** in the back.
~YJOTM MAY '16~
~YJOTM JULY '19~
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post #9 of 25 Old 08-13-2019, 01:13 PM
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Turn on the low beams. Set the meter to 12v DC stick the black probe on battery ground use the positive to probe the 3 contacts in the socket. 1 of them should have 12v with the low beams turned on. The dc symbol is usually a solid straight line over a dotted straight line

1995 YJ. 2 inch BDS Spring lift. 1 inch shackle lift. 1.25 inch JKS Body Lift 33x12.5x15's. Engo 10,000 pound winch.

Quote:
Originally Posted by Magnum View Post
I gave the Jeep the required offering of $$, sweat, and blood, and everything works fine now. -- Jim
Quote:
Originally Posted by ldso View Post
. It started with a $200 axle, and a few thousand dollars later I was done :)
Quote:
Originally Posted by Luuca View Post
diagnose the real issue before you start going all Obama on it - spending mad cash you'll need for other important things.

Ask me how I know...
Quote:
Originally Posted by Overhead View Post
this is also my second set of RC springs this year. I'd rather spend the money again and get something that will last.
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post #10 of 25 Old 08-13-2019, 01:25 PM Thread Starter
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Thanks. I'll do this when I get home.... er I mean tomorrow. Tonight is the Aerosmith concert with my kid.
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post #11 of 25 Old 08-13-2019, 07:21 PM
jbolty
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has anyone suggested a voltmeter?

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post #12 of 25 Old 08-13-2019, 07:49 PM
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...amazing idea.

That's why you're mod, bruh. Lol

Stop whining about the 'ride' - If your YJ ain't wrangling your soul free, then might I suggest you buy a stationwagon... at least you can fit all your bull**** in the back.
~YJOTM MAY '16~
~YJOTM JULY '19~
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post #13 of 25 Old 08-13-2019, 08:19 PM
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There’s the thing. If no power at the headlight prongs when the headlights are on low beam then it’s possible the switch is bad, but also possible something is unplugged/poor contact, or it’s the adjustment/length of the rod from stall to switch under the column.

I had a switch go bad once. I jumpered things under dashboard so I had low beams on the high beam output to get by. (I was swapping body/tub out soonish at the time and that “fixed it” for me

[size=“3”]Shackles & D-rings are different things.
Cranking IS turning over
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post #14 of 25 Old 08-15-2019, 05:27 PM Thread Starter
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Well, if I did this right, and keep in mind I have as much experience with a voltmeter said I do walking on the moon, I got a reading of around 12 point something with the hi beams (switch on, lights on). I get a big fat zero with the lo beams (switch on, no lights). I’ve already replaced then light switch itself. Could it be the dimmer switch? That thing looks like a pain in the bean bag to replace.


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post #15 of 25 Old 08-15-2019, 05:59 PM
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Quote:
Originally Posted by BChamberlin View Post
Well, if I did this right, and keep in mind I have as much experience with a voltmeter said I do walking on the moon, I got a reading of around 12 point something with the hi beams (switch on, lights on). I get a big fat zero with the lo beams (switch on, no lights). I’ve already replaced then light switch itself. Could it be the dimmer switch? That thing looks like a pain in the bean bag to replace.


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when you tested low beams you checked the other 2 prongs right? It won't have power on the same one the high beams are on. Your next step is to see if you have power coming out of the switch. If you have power there you then check at the dimmer on the column under the dash. Your actual on off switch is very common to go bad. If you need a new one It's called a rheostat

1995 YJ. 2 inch BDS Spring lift. 1 inch shackle lift. 1.25 inch JKS Body Lift 33x12.5x15's. Engo 10,000 pound winch.

Quote:
Originally Posted by Magnum View Post
I gave the Jeep the required offering of $$, sweat, and blood, and everything works fine now. -- Jim
Quote:
Originally Posted by ldso View Post
. It started with a $200 axle, and a few thousand dollars later I was done :)
Quote:
Originally Posted by Luuca View Post
diagnose the real issue before you start going all Obama on it - spending mad cash you'll need for other important things.

Ask me how I know...
Quote:
Originally Posted by Overhead View Post
this is also my second set of RC springs this year. I'd rather spend the money again and get something that will last.
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