79 CJ5 Driver's Side Tail Light Acting Up - JeepForum.com
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Unread 02-27-2013, 02:58 PM   #1
lsukevinc
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1979 CJ5 
 
Join Date: Mar 2009
Location: Geismar, Louisiana
Posts: 312
79 CJ5 Driver's Side Tail Light Acting Up

I had issues with the driverís side trail light since I purchased my jeep. If the jeep sits for a day or more, the passenger stop/taillight works fine. Some times when I turn on the light the brake will magically begin to work. The blinker and the running bulbs have always worked fine on the driverís side. It is just the brake light that is a mystery.

I completely rewired the taillight wiring harness from the fuse box back to the taillights. I have even grounded the housing to the rear cross member. Last night I even ran a wire straight from the ground point to the negative post on the battery and it was still hit or miss.

I checked for current at the taillight harness when the light was not working and there was none. Could it be the brake switch? Or does the brake switch only send out one signal?

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Unread 02-27-2013, 05:54 PM   #2
lsukevinc
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Anybody? Please
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Unread 02-27-2013, 05:59 PM   #3
skizriz
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1978 CJ7 
 
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Location: , Pa
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Did you put on new plugs and sockets when you rewired it?
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78 CJ7 258 TH400/Dana18 SOA/stock YJ springs 35" General Grabbers.
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Unread 02-27-2013, 06:35 PM   #4
lsukevinc
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Yes i did install new plugs and sockets. I am having the same problems I did before I did the re wire.
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Unread 02-28-2013, 11:05 AM   #5
jakwi
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1986 CJ7 
 
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Not sure about the CJ5 but I suspect it is the same as a cj7. I had a similar problem and it turned out my turn signal switch wasn't centering well. Both the turn signal and brake light are the same element in the bulb and run through that switch. Try working the turn signal switch back and forth while pressing the brake pedal. With mine there is a sweet-spot that it seems to work in. I haven't gotten around to replacing my turn signal switch.
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Unread 02-28-2013, 03:12 PM   #6
lsukevinc
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1979 CJ5 
 
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Location: Geismar, Louisiana
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My turn signal does not reset after i turn. It is worth a shot. last night i walked into the garage and stepped on the brake, passenger works but not driver's side. I tired turning the lights on and off and still no light when i step on the brake pedal.
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Unread 03-01-2013, 05:54 AM   #7
lsukevinc
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1979 CJ5 
 
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Location: Geismar, Louisiana
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jakwi, i owe you one. It is the turn signal swtich. like you mentioned, it does have a sweet spot that the brake lights will work. looks like i have a project for the weekend now.
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Unread 03-02-2013, 08:52 AM   #8
jakwi
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1986 CJ7 
 
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Thats great! It sounded exactly like what I had seen on mine. When you fix yours let me know how it goes. I dont know when ill get the chance to fix mine. I'm not sure, but I suspect you might be able to just clean the contacts rather than replacing the switch. It depends on whether the switch is sealed or not.
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Unread 03-04-2013, 06:44 AM   #9
lsukevinc
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Location: Geismar, Louisiana
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the switch was prety worn out. The new one did fix the problem. now all of the turn signals and brake lights work.
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Unread 03-04-2013, 09:00 AM   #10
jakwi
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That's great, I'm glad it worked out. I need to get my but in gear and repair mine.
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