Sorry for the common post, 1978 CJ5 turn signal failure - JeepForum.com

 
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post #1 of 7 Old 05-31-2016, 10:21 AM Thread Starter
turbogus
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Sorry for the common post, 1978 CJ5 turn signal failure

Having issues with my computer viewing threads from this site I'm forced to make a new thread that I can view from my phone.
Howdy all, well now that 'Black Betty' is running once more I need to address other things. The turn signals recently quit. Both batteries are at 12v +, Headlights, hazard, running and brake lights work, just not the turn signals. Before this issue I added LED indicator lights that worked fine for a couple of months before this failure.
I recall it was something simple the last time this happened, but with all of the Head work and Carb work I've had to contend with I've forgotten.
By the TSM for this '78 apart from loose connections and burned out bulbs is an incorrect flasher, I've verified the connections and grounds and according to the TSM following this "If is no signal at any front, rear or indicator lamp, check the fuse". The flasher has not been disturbed. (unlike myself)
My question, where IS the fuse on this '78? The wiring diagram makes no clear reference to it.
Thanks and a lift of the lynch lid for your responses.
Gus


The parts shop that stocks part for Skylab II will not have parts for our year/model of Jeep
We cannot accurately judge the trajectory of a speeding critter (cat, dog, sasquatch)
Record heat waves and floods only occur when we visit that area
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post #2 of 7 Old 05-31-2016, 10:37 AM
Hellions
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If you still have the LED signal lights you will need to install a different flasher module (electronic version). LED's don't pull enough current to cycle the flasher circuit. It's plug-n-play and they're cheap.
By the way, what is a "lift of the lynch lid"?

1982 Jeep CJ7 +4". 360 w/Edelbrock Performer Intake and Holley Truck Avenger carb. T18/D300 (Advance Adaptors). Hedman inframes. CV Driveshafts. Dana 44 w/Locker. American Racing Stics 5 on 33/12.50 Cooper rubber. Poison Spyder Rocker Knockers. Bushwacker flares. YJ family cage and ORF spreaders.
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post #3 of 7 Old 05-31-2016, 01:32 PM Thread Starter
turbogus
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Thanks for your response Hellions, my Jeep has no "LED Signal Lights" only the speedometer head indicator lights are LED and they and the incadescent lights bulbs were working until recently.

"Lift of the lynch lid" as in tip of the hat... From the old National Lampoon magazine

The parts shop that stocks part for Skylab II will not have parts for our year/model of Jeep
We cannot accurately judge the trajectory of a speeding critter (cat, dog, sasquatch)
Record heat waves and floods only occur when we visit that area
turbogus is offline  
post #4 of 7 Old 05-31-2016, 04:48 PM Thread Starter
turbogus
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This photo represents what my fuse panel looks like;

The parts shop that stocks part for Skylab II will not have parts for our year/model of Jeep
We cannot accurately judge the trajectory of a speeding critter (cat, dog, sasquatch)
Record heat waves and floods only occur when we visit that area
turbogus is offline  
post #5 of 7 Old 06-01-2016, 06:47 AM
John Strenk
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I seriously think there is no fuse for the the turn signals on a 78 CJ.

Look at this picture:


The accessory feed from the ignition switch, (Yellow) goes directly to the flasher. The red/white wire from the flasher goes directly to the steering column connector for the turn signal switch.

Here is a 76-77 schematic which will be the same as yours except for the heater fan.
http://civilianjeep.info/Strenk/Elec...77hiMerged.jpg

You can trace the wires out and see there is no fuse in the circuit.

the TSM actually said to check the fuse?
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post #6 of 7 Old 06-01-2016, 08:20 AM Thread Starter
turbogus
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I can dig that John, thanks so much for that photo, the '78 Schedmatic shows no fuse either. It's the text in the TSM for the '79 that mentions that fuse, perhaps they flirted to install a fuse for it in the panel back in '77 but thought better of it.
From the '78 TSM
"DIRECTIONAL SIGNAL SWITCH
The most frequest cause of failure in the directional
signal system are loose connections and burned out bulbs.
A flashing rate approximately twice the normal rate
usually indicates a shorted out bulb in the circuit.
If a three lamp flasher is installed in a vehicle having
only two lamp bulbs per side, the lamps will light but
will not flash. If a two lamp flasher is used on a vehicle
having three lamps, the too high current draw will cause
the lamps to flash too fast.
If there is no signal at any front, rear or indicator lamp,
check the fuse."

This being said, while I do have running lights, just no turn signals at the indicator and lamps this'd lead me to the incorrect flasher mentioned above. What troubles me is the same flasher has been in place since I first purchased this Jeep over 5 years ago.
When I get a chance I'm going to engage the circuit and trace the wiring from the fuse panel, column connector and lastly inside the column where I have other issues (haz button won't stay pressed in and ignition key has to be forcefully held in while cranking the starter, theft prevention?)

The parts shop that stocks part for Skylab II will not have parts for our year/model of Jeep
We cannot accurately judge the trajectory of a speeding critter (cat, dog, sasquatch)
Record heat waves and floods only occur when we visit that area
turbogus is offline  
post #7 of 7 Old 06-01-2016, 08:38 PM Thread Starter
turbogus
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Join Date: Jun 2005
Location: Albany~town, Oregon
Posts: 2,046
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...it was the relay...
sometimes I can just feel those donkey ears spring up

I reckon I just became accustomed what with all the work on the motor of late to be having to go full tilt boogie on solving issues. Now it's on to the port side rocker bridges.

The parts shop that stocks part for Skylab II will not have parts for our year/model of Jeep
We cannot accurately judge the trajectory of a speeding critter (cat, dog, sasquatch)
Record heat waves and floods only occur when we visit that area
turbogus is offline  
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