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Main Forums => The Roundtable => Topic started by: cassandra and sara's daddy on January 13, 2012, 08:46:08 PM

Title: jeep headlights
Post by: cassandra and sara's daddy on January 13, 2012, 08:46:08 PM
worked last night   today no lights  high beams will come on if i hold the signal stalk back towards me but cut out if i let go.  some kinda fuse?   or relay? or....????
Title: Re: jeep headlights
Post by: Harold Tuttle on January 13, 2012, 08:51:28 PM
Day time running circuit?
Title: Re: jeep headlights
Post by: cassandra and sara's daddy on January 13, 2012, 09:08:25 PM
95 jeep  no daytime  it does have the deal where lights stay on for a couple mins after you turn it off
Title: Re: jeep headlights
Post by: RoadKingLarry on January 13, 2012, 10:01:47 PM
bad dimmer switch.
Title: Re: jeep headlights
Post by: Harold Tuttle on January 13, 2012, 10:11:49 PM
Does it have factory fog lamps?
Title: Re: jeep headlights
Post by: Hawkmoon on January 14, 2012, 01:36:03 AM
95 jeep  no daytime  it does have the deal where lights stay on for a couple mins after you turn it off

If the 95 is wired like my 88, there's a circuit breaker in the headlight switch itself -- no external fuse. The circuit breakers rarely go bad. When they do, the lights will work for a few minutes, then cut out when the breaker heats up, then they'll come back on when it cools down.

That "headlight sentinal" delay thingie may be the culprit, and I believe it's a simple module plugged in between the headlight switch and the wiring harness. If you can find it, see if you can remove it and plug the two parts of the harness directly together. If that fixes it, you found the problem.
Title: Re: jeep headlights
Post by: cassandra and sara's daddy on January 14, 2012, 10:23:48 AM
Does it have factory fog lamps?

yes it does
Title: Re: jeep headlights
Post by: Hawkmoon on January 14, 2012, 11:07:37 AM
Does it have factory fog lamps?

Shouldn't matter.

More to the point, do the parking lights come on? If the parking lights work, the headlight switch is working, so you should focus on the sentinal delay module.
Title: Re: jeep headlights
Post by: Brad Johnson on January 14, 2012, 11:24:53 AM
I think the passing light circuit (lights coming on when you hold the stalk back) is seperate from the runtime circuit.  In other words the current is pulled directly from the fuse block through a unique power feed to that's seperate from the power feed that's used for regular headlight operation.

Check your fuses, all your fuses.  If your Jeep is like my parent's Tahoe, there can multiple fuses in the circuit, and in any one of THREE different fuse box locations.  It's maddeningly complex and the locations are seemingly random, but that's the way it is.

Brad
Title: Re: jeep headlights
Post by: cassandra and sara's daddy on January 14, 2012, 11:29:04 AM
gentlemen i thank you all. temp is about to liquify water and i am going outside to fix it

while i wouldn't let any of you marry my sister you are a tremendous collective of info and experience. and i benefit greatly from it
Title: Re: jeep headlights
Post by: wmenorr67 on January 14, 2012, 11:37:14 AM
gentlemen i thank you all. temp is about to liquify water and i am going outside to fix it

while i wouldn't let any of you marry my sister you are a tremendous collective of info and experience. and i benefit greatly from it

If your sister is anything like you, I don't think any of us would want to marry her. >:D [popcorn] :laugh:
Title: Re: jeep headlights
Post by: cassandra and sara's daddy on January 14, 2012, 12:08:16 PM
If your sister is anything like you, I don't think any of us would want to marry her. >:D [popcorn] :laugh:


she is absolutely nothin like me, and you may have erroneously assumed my interest was in protecting her from you.  quite the opposite. shes like a female josie wales."easy to track  leaves dead men everywhere she goes"

truly driven.  retook sats in an effort to get from 1580 to the perfect 1600. 4.0 plus all the way through school including yale law school. the big scandal in her life was 1 b+ in pre law that she fought to get changed and failed.  a very scary lady
Title: Re: jeep headlights
Post by: wmenorr67 on January 14, 2012, 12:09:24 PM

she is absolutely nothin like me, and you may have erroneously assumed my interest was in protecting her from you.  quite the opposite. shes like a female josie wales."easy to track  leaves dead men everywhere she goes"

truly driven.  retook sats in an effort to get from 1580 to the perfect 1600. 4.0 plus all the way through school including yale law school. the big scandal in her life was 1 b+ in pre law that she fought to get changed and failed.  a very scary lady

So she would actually have the common sense to stay away from most of us anyway. :laugh:
Title: Re: jeep headlights
Post by: cassandra and sara's daddy on January 14, 2012, 12:20:57 PM
So she would actually have the common sense to stay away from most of us anyway. :laugh:


perhaps not  shes a borderline man hater who just divorced her hubby of 20 some years.
  she believes in sport/trophy hunting  >:D
Title: Re: jeep headlights
Post by: wmenorr67 on January 14, 2012, 12:24:10 PM

perhaps not  shes a borderline man hater who just divorced her hubby of 20 some years.
  she believes in sport/trophy hunting  >:D

Thanks for the warning.  Maybe you should set her up with Mabs. [popcorn]
Title: Re: jeep headlights
Post by: cassandra and sara's daddy on January 14, 2012, 12:32:07 PM
Thanks for the warning.  Maybe you should set her up with Mabs. [popcorn]

you do have a mean streak.  i wouldn't set fistful up with her, if he was single.  neither would survive

we get along ok now.  not always though when she was 19 and i was 21 i gave her a 3 piece and knocked her out at the dinner table.most folks would say hitting a girl was evil, not so folks who knew her.  they are just surprised she didn't have me killed  i also threw her out on xmas eve from the home place a few years later.  she is one scary lady.  and the deceptive camouflage is particularly good. by the time they realize the danger they are lying in a pool ot their own blood dying
Title: Re: jeep headlights
Post by: wmenorr67 on January 14, 2012, 12:38:08 PM
you do have a mean streak.  i wouldn't set fistful up with her, if he was single.  neither would survive

we get along ok now.  not always though when she was 19 and i was 21 i gave her a 3 piece and knocked her out at the dinner table.most folks would say hitting a girl was evil, not so folks who knew her.  they are just surprised she didn't have me killed  i also threw her out on xmas eve from the home place a few years later.  she is one scary lady.  and the deceptive camouflage is particularly good. by the time they realize the danger they are lying in a pool ot their own blood dying

Damn now I'm curious.  If she pissed you off that much, makes me wish I was single, I would be willing to take a chance. [popcorn] =D
Title: Re: jeep headlights
Post by: cassandra and sara's daddy on January 14, 2012, 12:47:49 PM
Damn now I'm curious.  If she pissed you off that much, makes me wish I was single, I would be willing to take a chance. [popcorn] =D

heck  she didn't piss me off  she through a plate of spaghetti (with the plate) in my face from 3 foot away. i was stunned for a second then just reacted on instinct.  i was scared after. he b/f could kick my butt.  xmas eve she fomented a fight between my lil bro and dad. i was awakened to her screaming for help. i peeled lil bro off dad.  dad suckered punched lil bro while i held him. i punched dad out.  and it all started when she decided to pour lil bros vodka out in the sink.  he 21 and in his own house. i don't blame him for being mad


you or the revdisk might enjoy/survive dating her. you need a permission slip from wife as well as a living will to take that chance
Title: Re: jeep headlights
Post by: Harold Tuttle on January 14, 2012, 01:09:59 PM
my grand cherokee factory fogs have a relay that switches them off when you switch on the high beams
Title: Re: jeep headlights
Post by: cassandra and sara's daddy on January 14, 2012, 01:10:57 PM
my grand cherokee factory fogs have a relay that switches them off when you switch on the high beams
mine cherokee sport does too
Title: Re: jeep headlights
Post by: Harold Tuttle on January 14, 2012, 07:50:12 PM
So are you fog lights working?
Title: Re: jeep headlights
Post by: cassandra and sara's daddy on January 14, 2012, 07:52:27 PM
yes so long as i don't use high beams
Title: Re: jeep headlights
Post by: cassandra and sara's daddy on January 16, 2012, 08:19:35 AM
Where the module/relay located? What's it look like ?
Title: Re: jeep headlights
Post by: Jamisjockey on January 16, 2012, 09:03:12 AM
When I had my '94, I could literally do anything it needed out of a chilton's manual.  Man, I miss that jeep!
Title: Re: jeep headlights
Post by: Tallpine on January 16, 2012, 09:25:14 AM
My daugher has a 90-something Cherokee.

The biggest problem that she has had with it has been with the door locks/latches and rear gate  ;/
Title: Re: jeep headlights
Post by: Jamisjockey on January 16, 2012, 09:27:26 AM
My daugher has a 90-something Cherokee.

The biggest problem that she has had with it has been with the door locks/latches and rear gate  ;/

I had mine get gummed up nasty once.  Pulled the mechanisim for the rear gate, soaked it in degreaser, dried it, liberally applied powder teflon lubricant and it worked like a charm thereafter.
Title: Re: jeep headlights
Post by: Tallpine on January 16, 2012, 11:02:10 AM
I had mine get gummed up nasty once.  Pulled the mechanisim for the rear gate, soaked it in degreaser, dried it, liberally applied powder teflon lubricant and it worked like a charm thereafter.

Come to think of it, I may have actually fixed that one - loosened a clamp and took up some slack in the cable and re-tightened the clamp  =|

AFAIK, she never did find the inside cover plate which she had taken off some time before that  ;/
Title: Re: jeep headlights
Post by: Hawkmoon on January 16, 2012, 11:48:18 AM
The '94 Jeep factory service manual says the delay module is located on the inside of the instrument panel, to the right of the headlight switch.

Quote
Removal
  • Remove the lower instrument panel
  • Remove the screw that attaches the module to the inside of the instrument panel
  • disconnect the wire harness connector and remove the module from the instrument panel

Ah -- the '94 manual says if both high beams and low beams are inoperative, test the 40-amp fuse for continuity and replace if necessary. News to me -- my '88 Cherokee still uses the integral circuit breaker. So I'd start with the fuse before dismembering the dashboard. Lemme see if it'll tell me where said fuse is. A 40-amp is going to be a big sucker ...

Great. The trouble-shooting clearly says "40-amp" but the fuse panel chart doesn't list any 40-amp fuses. #17 is 7.5-amp for the delay module.

But wait -- why put all the fuses in the fuse panel? There's a "power distribution center" under the hood. Along with a bunch of relays, it looks like there may be a 40-amp fuse for the headlights. #F6.
Title: Re: jeep headlights
Post by: Harold Tuttle on January 16, 2012, 02:01:49 PM
prolly similar tech:
http://www.lunghd.com/Tech_Articles/Electrical/1997_UP_Fuse_Identification.htm
Title: Re: jeep headlights
Post by: cassandra and sara's daddy on January 16, 2012, 03:44:45 PM
The '94 Jeep factory service manual says the delay module is located on the inside of the instrument panel, to the right of the headlight switch.

Ah -- the '94 manual says if both high beams and low beams are inoperative, test the 40-amp fuse for continuity and replace if necessary. News to me -- my '88 Cherokee still uses the integral circuit breaker. So I'd start with the fuse before dismembering the dashboard. Lemme see if it'll tell me where said fuse is. A 40-amp is going to be a big sucker ...

Great. The trouble-shooting clearly says "40-amp" but the fuse panel chart doesn't list any 40-amp fuses. #17 is 7.5-amp for the delay module.

But wait -- why put all the fuses in the fuse panel? There's a "power distribution center" under the hood. Along with a bunch of relays, it looks like there may be a 40-amp fuse for the headlights. #F6.


yup that 40 amp is in the block under the hood  and its still good
Title: Re: jeep headlights
Post by: Hawkmoon on January 16, 2012, 04:48:01 PM

yup that 40 amp is in the block under the hood  and its still good

Check it carefully -- or with a V.O.M. There's a similar 40-amp fuse in my wife's 2000 Cherokee, for the auxiliary cooling fan. The fan locked up, and after I replaced it the new one wouldn't come on. The fuse looked good, visually, but when I checked it with a multimeter it was an open circuit.
Title: Re: jeep headlights
Post by: cassandra and sara's daddy on January 16, 2012, 04:53:27 PM
Check it carefully -- or with a V.O.M. There's a similar 40-amp fuse in my wife's 2000 Cherokee, for the auxiliary cooling fan. The fan locked up, and after I replaced it the new one wouldn't come on. The fuse looked good, visually, but when I checked it with a multimeter it was an open circuit.

thanks i'll do that soon as wife brings it home
Title: Re: jeep headlights
Post by: Jamisjockey on January 16, 2012, 07:03:20 PM
Fun cherokee story:
My ignigtion switch went out once.  It wouldn't turn off.  I had to reach up and manually turn the swtich off.
It shocked the *expletive deleted*it out of me first time I had to do it.   :O