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Unread 01-16-2014, 08:53 PM   #1
Gante
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Join Date: Mar 2013
Location: Whittier, CA
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Help with 4WD and BRAKE light indicators

Guys,
I am having a few minor issues on my 91 Waggy.

My 4WD light does not light up when 4WD is selected. The 4WD works and the light bulb for the indicator is also working (tested bulb)... What would I need to check now to figure out why this is not lighting up?

Also, the BRAKE light indicator only turns On for a few seconds when I start the truck, the it turns off... I wanted to check any issues with a brake switch but I didn't see it anywhere on the emergency brake assembly. Where is it exactly and what else could be the issue?
Thank you,

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Unread 01-17-2014, 05:58 AM   #2
vanaisa
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1974 FSJ Cherokee 
 
Join Date: Dec 2008
Location: Tallinn, Estonia
Posts: 80
Isnt this, how brake light should work?
In start you see that it is operational and if always on, you have problems with brake system...
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Unread 01-17-2014, 06:57 AM   #3
Gante
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Quote:
Originally Posted by vanaisa
Isnt this, how brake light should work? In start you see that it is operational and if always on, you have problems with brake system...
I am referring to the brake light indicator on the dash that reads "BREAKE"... I believe this is the one to indicate your emergency break is "On", correct?
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Unread 01-17-2014, 06:58 AM   #4
Gante
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Hahaha!! I can't even spell correctly... I little to early. I mean "Brake" on my previous post.
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Unread 01-17-2014, 07:07 AM   #5
vanaisa
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1974 FSJ Cherokee 
 
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Well at least in my 74 Cherokee it was lit only when one brake hose was cut.
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Unread 01-18-2014, 12:52 PM   #6
gcarson64
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1988 FSJ Wagoneer 
 
Join Date: Sep 2010
Location: fairborn
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On my 1988 GW i blew a rear brake line and the light came on. I do not believe it is there for the E brake, but is a warning light to let you know there is a problem in the brake Hydraulic system. Hope this helps. It will come on for a couple seconds when the ignition key is turned on to test it is in working condition and then go out.
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Unread 01-18-2014, 06:04 PM   #7
Gante
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Quote:
Originally Posted by gcarson64
On my 1988 GW i blew a rear brake line and the light came on. I do not believe it is there for the E brake, but is a warning light to let you know there is a problem in the brake Hydraulic system. Hope this helps. It will come on for a couple seconds when the ignition key is turned on to test it is in working condition and then go out.
In that case, I am glad the light is off. I really thought this was for the E brake. Thank you guys for educating me on this lib dictator.

How about the 4x4 indicator? The indicator bulb and 4x4 work fine. I checked an electrical connector that goes to the transfer case to ensure it is connected. What else do I need to check to fix that indicator?
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Unread 01-18-2014, 06:57 PM   #8
gcarson64
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1988 FSJ Wagoneer 
 
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Idk about the 4x4 light. It sounds like the switch that turns the light on is jammed or went bad. I not sure where the switch is, could be in the transfer case or on the lever in the cab. A repair manual might say.
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Unread 01-18-2014, 07:28 PM   #9
DotJumper
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1988 FSJ Wagoneer 
 
Join Date: Dec 2011
Location: McKinney, TX
Posts: 29
Well, on my '88 the "BRAKE" light is an indicator that the parking brake is on. Just confirmed. I'm sure is also an indicator for low pressure in the brake system.

Since you confirmed the bulb, I'd go to the parking brake. A wire runs down there for the switch. Put a ground to the wire. If the "BRAKE" light goes on, then the issue is with the switch or parking brake grounding. If not then you have an issue between the parking brake switch and the light.

If you have a multi-meter for testlight, it's good idea to confirm the switch. Ensure is providing ground when the parking brake is depressed. If not check the parking brake assembly to ensure it has a good ground. If it is, replace switch.

As for the 4x4 indicator light, on the NP229, the indicator switch is towards the bottom of the Tcase nearer the rear. Start there. I had a wire issue since they had evidently layed on the exhaust at some point.
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Unread 01-19-2014, 10:31 AM   #10
super98lsc
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1999 WJ 
 
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Your correct it's multifunction comes on for low fluid, pressure as well as the parking brake. My 90 is the same way.
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Unread 01-19-2014, 12:52 PM   #11
gcarson64
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1988 FSJ Wagoneer 
 
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Thats good to know that its for the parking brake also. I almost never use the parking brake. In the rare occasion that i did, i released it before turning the key to on so i wouldn't have seen the light.
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Unread 02-06-2014, 07:15 PM   #12
Gante
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I am still trying to figure out why these indicators don't turn On when they should. As I said, I have checked the light bulb and they are good... Is there anything else I could check? Is there a fuse somewhere specific to these two lights?
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Unread 02-07-2014, 01:28 PM   #13
jamesmega
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1988 FSJ Wagoneer 
 
Join Date: Nov 2013
Location: College Park, MD
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Mine weren't working but started working when I changed the bulbs (I know that doesn't help). But I also sprayed everything down with an electric cleaner and then added dielectric to the round and flat wire connectors. Maybe it'll help.
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