Troublesome rear turn signal voltage. (1 Viewer)

[Engineer8000]

With these old switches, you can try to cycle it a bunch of times to see if it clears up. If not, you can also remove the gauge cluster to access the hazard switch. Remove the knob from the switch, there is a set screw you loosen then unscrew the knob. The nut holding the switch is called a pin nut. There are pin nut wrenches but most use snap ring pliers or needle nose pliers in the pin hoes to unscrew the nut, taking care to not jump out and scratch the dash. As @charliemeyer007 states, there are spring loaded parts inside the switch so work in a box. Randomly spraying stuff in the switch will likely not be a long term fix. Take it apart, clean it up and lube with dielectric grease to keep the contacts clean. @ToyotaMatt has refurbed a bunch of these so it can be done.

 

[pb4ugo]

pin hoes

 

[ToyotaMatt]

Pin wrench nut ....

use the largest right angle / 90' degree tipped ones you can

site-protect your painted dash with blue painters eazy-release tape ......the entire area round the HAZARD switch you are removing , so as not to mar the single stage enamel painted surface ,,,,


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[krispy]

Thanks all for the support, and directions! Thanks, Matt, for the photos and right-angle tool suggestion! I'll likely get to this on Sunday and let you all know what I find.

 

[Engineer8000]

Dang, missed that.

 

[Engineer8000]

Pin nut wrench

 

[krispy]

I got conscripted into hanging Xmas lights, so I didn't get too far into this investigation over the weekend. I did have a moment to get the hazard switch out, though. It's not as bad as some other parts of this rig, but it's definitely dirty and looks to have a good amount of dirt and dust in it. Is it ok to cut away that plastic? If so, what do I replace it with when im done?

That radio delete opening tore me up. I got to clean up those edges!

 

[45Dougal]

Personally I avoid doing anything which can't be undone unless it's absolutely essential. That means don't cut the switch up unless you've tested it with the meter and found it to be faulty, and then can't restore it with a bit of contact cleaner and some cycling in and out.

How does the connector for the switch look?
Corroded contacts or crimps?
Do you have a good 12v supply from both fuses?
Can you jumper across the connector and make it all work correctly? (needs three jumpers and is fiddly in situ tbf).
Did you check voltage at the front turn signals? If it was good, then I'd be looking at the solder joint in the harness at the back corner of the truck where it splits in two.

 

[krispy]

I got around to pulling apart, cleaning the contacts, and re-lubricating the ball bearing slide on the Hazard switch (thanks @

Engineer8000​

for the box tip, that was super handy). Since I was in that mode, I pulled apart and cleaned the wiper and the fan switches, too, and then also replaced the very corroded cigarette lighter adapter. They all work now, and everything seems to be functioning via switches. However, that did not solve my rear turn signal issue. What solved it, is a less than $10 flasher relay designed for LEDs. Once I put that in, the front signals brightened up, and the rear signals started working.

Thanks all for your help with this. Your guidance is super appreciated!