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Unread 11-26-2011, 07:18 PM   #1
Baldum
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Turn Signal Issues (Won't Blink)

Hey all!
Just joined the forums This place seems great

I have a 1984 CJ-8 that I've been restoring over the past year. With the body work mostly done I'm onto the electrical.

I did my research, but please bear with me as my electrical skills are less than adequate.

As the title suggests, my front turn signals will not blink. The parking lights will go on; when I flip the stalk, however, the respective light appears to get brighter (as if the second coil is lighting) but won't blink. The dash lights go on, but also don't blink. I currently don't have tail lights so I cannot use them to troubleshoot.

From my research I can figure it's a relay, an "in-line" flasher or the switch in the column. I'm not too positive however, how can I troubleshoot?. Any thoughts?

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Unread 11-26-2011, 07:24 PM   #2
WoodyHD
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I think your problem might be due to you not having taillights installed. I had the same problem as you. Problem was I had a bad set of led taillights that were progressively burning out individual leds. Same problem even when I unplugged both bad taillights (imitating no taillights such as yourself). Replaced and problem fixed.
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Unread 11-26-2011, 07:34 PM   #3
lucdog
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I would second the rear lights being hooked up. I believe the flasher itself needs resistance to work. There's not enough with just one light.

Bill
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Unread 11-26-2011, 08:49 PM   #4
Baldum
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Good point, they were shining quite brightly come to think of it.

Sound's good. Thanks a lot, hopefully that solves it
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Unread 11-26-2011, 08:57 PM   #5
bentring
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Quote:
Originally Posted by lucdog View Post
I would second the rear lights being hooked up. I believe the flasher itself needs resistance to work. There's not enough with just one light.

Bill
Pretty sure you're correct about resistance needed. It could explain why olders cars often blink very rapidly or not at all of you have a blinker light burned out.
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Unread 11-27-2011, 08:13 PM   #6
TJ0002
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Your right on needing the resistance to make them blink.
But he could also have a bad ground on the front lights. On my 79 the rears would blink but not the front. Finally figured out the side markers would blink on when the fronts would blink off. After thinking back years ago to my 76 that was new thats how they worked too. Found out the light on the front grounds with just the mounting screws and they were rusty so they were not grounding. Took a battery bost brush and cleaned up the sockets replaced the rusty bulbs and ran in some new screws and they work like new...
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Unread 11-27-2011, 08:21 PM   #7
Micahbo
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I was having the same issue this past weekend, I changed out the flasher relay in the fuse block (they are 2.50 at the local parts store) but I also had to change out the contact inside the bulb housing because it was not making good contact. This is on my 77, so you may have a different setup, but my issues were solved.
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Unread 11-27-2011, 09:13 PM   #8
mopar346
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The lack of taillights is the answer or at least you cant determine anything else until the circuit is complete.
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Unread 11-29-2011, 07:49 PM   #9
Baldum
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Well, I added tail lights and the driver's side lights will blink. The passenger side, however, will not. Is this a case of bad grounding? If one side works but the other does not could it possibly be a bad signal switch at this point?
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Unread 11-29-2011, 08:33 PM   #10
Foundrydude
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Get a transistorized flasher instead of a silver can thermal flasher. Thermal flashers are resistance based, transistor flashers have a little circuit board.

One working, one not tells you there's a difference in resistance side to side. May be a bulb not working or may be mismatched bulb numbers. Like a 1056 and and a 2056 look the same but the 2056 is a higher wattage bulb. Same will 1157 and 2057.

good luck
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Unread 11-29-2011, 09:19 PM   #11
lucdog
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Quote:
Originally Posted by Foundrydude
Get a transistorized flasher instead of a silver can thermal flasher. Thermal flashers are resistance based, transistor flashers have a little circuit board.

One working, one not tells you there's a difference in resistance side to side. May be a bulb not working or may be mismatched bulb numbers. Like a 1056 and and a 2056 look the same but the 2056 is a higher wattage bulb. Same will 1157 and 2057.

good luck
Dude, how do you tell one from the other.

On the bulbs, I was told in a Harley Davidson forum, some time ago, that the 20 series bulbs were just a heavy duty bulb able to withstand vibrations better.(mainly used by tractor/trailer rigs), These are the only ones I use. I don't feel there any brighter.
Looks like a Google search is in order.

Thanks about the flashers, Bill

On edit, after a quick search, (5 links on the first page) I feel I'm correct. In fact some said the 20 series bulbs they thought were a little dimmer. Looking at a bulb wattage/lumens chart, they look to be the same. A heavier filiment and thicker glass was also noted.
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1957 WILLYS pickup, needs work.
1973 J 4000,
1978 CJ7 DD.
1979 CJ7 360, TH400/Quadratrac trail Jeep.
1979 J20
1980 CJ5 trail Jeep.
1983 CJ7 pretty weekend and sometimes to work Driver in the summer, My first rebuild, if the Q-trac and 5 are broke, this one is the one to take. its just as capable as the other 2, except nice paint.
1984 Grand Wagoneer, 1 ton axles, great 360/727, and a big a$& tree fell on it .
1989 YJ the CJ to YJ conversion.
2005 TJ Rubicon.
2011 Grand Cherokee Laredo 4x4, Mrs. LUCDOG's DD.
Lots of parts not for sale, i'm a hoarder.
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Unread 11-29-2011, 09:20 PM   #12
CJ5_Fan
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Quote:
Originally Posted by Foundrydude View Post
Get a transistorized flasher instead of a silver can thermal flasher. Thermal flashers are resistance based, transistor flashers have a little circuit board.

One working, one not tells you there's a difference in resistance side to side. May be a bulb not working or may be mismatched bulb numbers. Like a 1056 and and a 2056 look the same but the 2056 is a higher wattage bulb. Same will 1157 and 2057.

good luck
+1 Ditto.... check for mis-matched bulbs with differnent ratings. That will cause this symptom every time.
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Unread 11-30-2011, 05:53 AM   #13
Foundrydude
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OK, 20s may be a heavy duty but the point of my post is the last 2 bulb digits signify interchangeability. So if you have a 1056 on one side and a higher watt 1156 on the other, one side may not flash if you're on the edge of the flasher's target resistance.

Transistorized flashers are towing flashers and don't come in a silver aluminum can, they typically have a smoked tint plastic instead of the silver can.
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Unread 11-30-2011, 07:18 AM   #14
JeepFish1979
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Do both brake lights come on? I had to tweak both of my taillight sockets to make good connection on my bulbs. But the brake light uses the same wire and filament as turn signal so you can use that to troubleshoot that tail light.
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Unread 11-30-2011, 08:52 PM   #15
Baldum
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I replaced the flasher with a transistor based one. Seems like everything is fixed, I just need to rewire a good amount of the tail lights because the PO was a butcher

Thanks for all the help, I would recommend replacing the thermal flasher to anyone with a CJ
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