I swapped the master and slave last night in my 85 fj. Went out this morning in it and tried to turn the blinker on and got nothing. No sound no lights on the dash and no signal lights blinking. Fuse is good. Hazards don't work either. I'm sure I messed something up when I was fooling with unhooking/rehooking the clutch peddle up, but I'm stumped. Can anyone give me any leads? Any help is much appreciated.
Help - electrical issue. (1 Viewer)
- Thread starter nxtst
- Start date
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Doubt the electrical issue has any connection with swapping the clutch components. Did you disconnect the battery and forget to reconnect it? Try a jump start and see if that restores the electrical functions.
- Thread starter
- #4
horn works and the headlights work with ignition off and key out.
- Thread starter
- #5
I thought maybe I knocked a connection loose when I was working under the steering wheel adjusting the clutch pedal. Literally everything else is working as it should, just not the blinkers. I tried throwing battery charger on it on jump setting no luck.
The hazard, horn and headlight circuits all run off the same fusible link at the positive battery terminal. See wiring diagram below...I have highlighted those circuits in green.
This fusible link does not pass through the ignition switch, so this is why you should be able to turn them on with the Ignition OFF/Key OUT. The fact that the horn and headlights work indicates that the fusible link is good.
In the case of the Hazards, though, this is necessary but not sufficient for their functioning.
The Turn Signal (and also the Hazard) circuit runs off a different fusible link at the positive battery terminal, and must pass through the Ignition Switch. I have highlighted the circuit in red below.
EDIT: Note that I accidentally boxed in the 'stop' and 'backup' lights in with the turn signal lights...but in fact they are on a different circuit.
EDIT: Note that I accidentally boxed in the 'stop' and 'backup' lights in with the turn signal lights...but in fact they are on a different circuit.
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The Relay Block is located in the DS footwell. There is a Turn Signal Relay. If it isn't working, then the turn signals will not work...
According to the 'Body Electrical' Chapter of the '1980 Chassis-Body' FSM, if you don't hear an operation noise from the Turn Signal Relay (Key IN/Ign ON), then either the relay is bad, or the Turn Signal/Hazard switch is bad.
If you pull the Turn Signal Relay and see 12V at Terminal B (one of the terminals in the Relay Block where the Turn Signal Relay connects) with the Turn Signal switch ON to either L or R and Key IN/Ign ON, then you could assume that the switch is good and the relay is bad...and if you don't see 12V at terminal B under these conditions, then you might assume that the switch is bad.
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Might have bumped the turn signal relay when re-attaching the clutch pedal....
Try unplugging the relay and plugging it back in. Worth a try at least.
Try unplugging the relay and plugging it back in. Worth a try at least.
bunch of heros, hangin out here...you guys are alright
- Thread starter
- #12
Thanks a ton for all the help.
So, what I've gathered so far..
fusable link is good.
I don't seem to be getting 12v to the relay in the ds footwell, if I am correctly testing the correct relay, the turn signal relay is good.
So, that would mean it's the switch that's bad, right? Pardon my ignorance, but what is that, where is it, and what does it look like?
And is there any way to test it?Engine runs just fine. and the wipers work with the ignition on.
I was hoping it was something like that, thanks for the advice. I tried last night and if I pulled the correct relay, that was not the issue. (on mine its a big green square relay and it says "FLASHER" on it.)
So, that would mean it's the switch that's bad, right? Pardon my ignorance, but what is that, where is it, and what does it look like?
Double check that the 'Turn' fuse in the main fuse box is good (either visually or check for continuity electrically or both).
The '1980 Chassis_Body' FSM chapter 13 is the Body Electrical section. It contains images identifying the location of the Hazard switch, provides basic instructions on how you might access it and steps for troubleshooting it's function. The tests are electrical...continuity tests. Just need to unhook the connectors for the switch (positive cable on the battery is disconnected because when doing continuity tests the multi-meter generates it's own current), then follow the directions to check for continuity (or resistance...depending on multi-meter it can be called the same thing) between combinations of pins.
If you don't have the FSMs you can download them here:
https://forum.ih8mud.com/threads/fsms.743084/
Attached are (from that chapter in the FSM) images on where to locate the Hazard switch, the Wire Color Code and the steps for testing the switch.
Sounds like at least two of the three fusible links are good (because components behind these two are working)...and if the only thing not working is the turn signals, then the third is likely good too if you haven't directly measured the voltage at them...
Then sounds like that fusible link is good...as is the ignition switch...
- Thread starter
- #15
Thanks. When I get home I'll check the fuse again first, with a resistance tester, then I'll move to the switch. If the switch seems to be functioning properly and the fuse is good I'll just replace the relay and see if that fixes it.
When you tested for voltage at terminal B on the relay board (after having removed the Turn/Flasher Relay) was the Key IN/Ign ON? And was the Turn Signal handle flipped up or down (for L or R)?
That would be the next 'lowest cost' move...it is difficult to imagine how the Hazard switch itself is bad...but if it tests out as 'bad' you might try cleaning the contacts while you're in there...sometimes they just get contaminated after long life use...
Another thing to consider is a short at one of the turn signal light bulbs...but that usually results in blown fuses...and doesn't explain why you are not seeing 12V+ at terminal B on the Turn/Flasher Relay board...
That would be the next 'lowest cost' move...it is difficult to imagine how the Hazard switch itself is bad...but if it tests out as 'bad' you might try cleaning the contacts while you're in there...sometimes they just get contaminated after long life use...
Another thing to consider is a short at one of the turn signal light bulbs...but that usually results in blown fuses...and doesn't explain why you are not seeing 12V+ at terminal B on the Turn/Flasher Relay board...
- Thread starter
- #17
Yes the ignition was on and the signal was on. I tried both right and left signal, as well as hazards. I just did the test on the switch from the FSM and it failed the test. Thanks for all the help, I ordered the switch and I'll update y'all when I get it installed to see if that fixes it.
