Hey all,

I know this is a very common ask, but I've tried all the usual fixes.

So, my turn signals/brights/hazards are out. They were working intermittently, but usually solved by toggling the hazard switch like a maniac until they worked (for the past year? Also I had to signal manually most of the time, the stalk would give me a consistent light and I'd have to flick it to blink. Hazard would also just be on, not flashing. brights worked fine.

• I have replaced fuses 12 and 2
  
• I have taken apart and cleaned both my relay and switch, and have a spare hazard switch.
  
• I shorted the hazard 30 to 49, I can hear the click of the shifter by the relay responding, relay also getting signal from the stalk.
  
• Stalk always has given me intermittent wipers without issue.
  
• Flasher relay is audibly reacting to both the hazard switch, and the signal from the stalk (but solid on click, instead of flashing, as it was before)

What next? Pulling the instrument cluster for bad grounding? To be honest I don't know how to identify the issue once I pull it, I'm not great with electrical.


Going crazy trying to solve this while in quarantine, would love to get the hell out of Dodge (NYC)

Thanks so much all,

LBJ

__________________
1985 300D Surfblau "Blueberry" 250K R.I.P
1984 300CD Manila Beige "The Banana" 238K R.I.P
1984 300TD Cypress Green "Olive" 390K (M.I.A.)
1982 300D Orient Red "Steak" 195K
1985 Euro 300TD Lapis Blue “Pancake” 200k KM
1982 300D Light Ivory “Butter” 183k
1984 300TD Black “Pepper” 55k

clean the ground beside the RH headlight assy

Actually from the tests that you did and your deductions I would say you are much better then average with the electrical stuff.

__________________
84 300D, 82 Volvo 244Gl Diesel

Thank you! I'll give this a go and report back.

__________________
1985 300D Surfblau "Blueberry" 250K R.I.P
1984 300CD Manila Beige "The Banana" 238K R.I.P
1984 300TD Cypress Green "Olive" 390K (M.I.A.)
1982 300D Orient Red "Steak" 195K
1985 Euro 300TD Lapis Blue “Pancake” 200k KM
1982 300D Light Ivory “Butter” 183k
1984 300TD Black “Pepper” 55k

Thank you, I appreciate it!

I hit my limit of knowledge for this issue so here I am.

__________________
1985 300D Surfblau "Blueberry" 250K R.I.P
1984 300CD Manila Beige "The Banana" 238K R.I.P
1984 300TD Cypress Green "Olive" 390K (M.I.A.)
1982 300D Orient Red "Steak" 195K
1985 Euro 300TD Lapis Blue “Pancake” 200k KM
1982 300D Light Ivory “Butter” 183k
1984 300TD Black “Pepper” 55k

Taking apart and cleaning relays and switches is a good quarantine activity though, I feel somewhat productive.

high beams and turn signals not flashing are separate issues. to fix the turn signal not flashing, replace the 100uf/35v capacitor in the flasher relay. cleaning the contact points is good, but the flash is set by a resistance-capacitance circuit and the capacitors go bad with age.

-dan

When my Turn Signals stopped working I found that the Hazard Switch was the cause. Apparently my Wife had been thumping here purse down on top of the Hazard switch.
A new Hazard Switch fixed the issue.

__________________
84 300D, 82 Volvo 244Gl Diesel

go to page 28 of this wiring diagram:


https://www.startekinfo.com/StarTek/outside/12265/disc_2/program/ETM/83_300.pdf


and with a red hazard switch (which controls the turn signals too) removed check:


battery voltage at plug terminal #30


battery voltage at plug terminal #15 (ignition in run position for this one)


testing the hazard switch in OFF position :


terminal 15 and 49 continuity but no continuity between (49 and 30) or (30 and 15)

No continuity between 49a, L, R terminals

Resistance between 58 and 31 (that's the switch light)


testing the hazard switch in ON position :


terminal 30 and 49 continuity but no continuity between (49 and 15) or (30 and 15)

Continuity between 49a, L, R terminals (also resistance between any of those and 31)

58 should not have continuity between anything at this setting


report back and good luck

To check your flasher relay:


It's located in the center console forward of the shift lever


plug #4 should be grounded #3 is power from hazard switch and #1 is power going to turn signal stalk.


You could also hook it up on the bench if you follow the wiring diagram I posted in the previous post to check if it works.

gave this a go, the contacts were surprisingly clean, still nothing.

__________________
1985 300D Surfblau "Blueberry" 250K R.I.P
1984 300CD Manila Beige "The Banana" 238K R.I.P
1984 300TD Cypress Green "Olive" 390K (M.I.A.)
1982 300D Orient Red "Steak" 195K
1985 Euro 300TD Lapis Blue “Pancake” 200k KM
1982 300D Light Ivory “Butter” 183k
1984 300TD Black “Pepper” 55k

Thank you! I have one, will, pop that in tonight, now very familiar with pulling the relay and taking it apart...

__________________
1985 300D Surfblau "Blueberry" 250K R.I.P
1984 300CD Manila Beige "The Banana" 238K R.I.P
1984 300TD Cypress Green "Olive" 390K (M.I.A.)
1982 300D Orient Red "Steak" 195K
1985 Euro 300TD Lapis Blue “Pancake” 200k KM
1982 300D Light Ivory “Butter” 183k
1984 300TD Black “Pepper” 55k

I pulled and cleaned the relay, it's functioning but have to manually toggle, going to replace the capacitor tonight so when I DO have headlight, they flash.

the relay is getting signal from the stalk and the hazard switch.

I need to go through you other post/check the diagram and run down the list.

Thanks so much for taking the time

__________________
1985 300D Surfblau "Blueberry" 250K R.I.P
1984 300CD Manila Beige "The Banana" 238K R.I.P
1984 300TD Cypress Green "Olive" 390K (M.I.A.)
1982 300D Orient Red "Steak" 195K
1985 Euro 300TD Lapis Blue “Pancake” 200k KM
1982 300D Light Ivory “Butter” 183k
1984 300TD Black “Pepper” 55k

the relay senses ground from the bulbs/stalk and then it decides to send power THROUGH the stalk->bulbs in a blinking pattern

ohh, in my brain it worked the opposite way, I thought since the stalk was activating the relay it meant the stalk was good, but this means it could still be the culprit?

__________________
1985 300D Surfblau "Blueberry" 250K R.I.P
1984 300CD Manila Beige "The Banana" 238K R.I.P
1984 300TD Cypress Green "Olive" 390K (M.I.A.)
1982 300D Orient Red "Steak" 195K
1985 Euro 300TD Lapis Blue “Pancake” 200k KM
1982 300D Light Ivory “Butter” 183k
1984 300TD Black “Pepper” 55k