75 Turn Signal woes

[billstoudt]

I have been laboring over this issue ever since i bought my rig and i have never been able to figure out what is causing it. i'm sure its something simple but i just cant narrow it down.

turning the lever either right or left will cause the appropriate blinker to turn on ( but not off or blink )
turning on the hazzard causes the right blinker to blink. and when i turn hazzard and turnlever left both hazzards blink fine.

the voltages on the side bulb of the turn signal is 12+ volts however the top of the turn signal is only 7 volts.

ive done some checks with the wires to make sure they weren't shorting to ground and i cant seem to figure out where my problem lies.

any help would be greatly appreciated.

Bill

 

[npulver]

not 100% sure without screwing with it myself. but its sounds like either your switch is bad, or your relay is bad to me. That is if nothing is shorted anywhere else.

 

[BBQ BOY]

Praise the Lord someone else is having this same issue. My right blinker only works when it wants to. Bulb is new and that helped because. Before when I replaced it never worked but now it works about 10% of the time.

 

[davegonz]

Add a ground to the light housing that's giving you problems. Most of the time it's a grounding issue.

 

[bobm]

Ask LAMBCRUSHER

 

[billstoudt]

ok i'll add ground to the left light (right light is already grounded) and see if that helps

 

[billstoudt]

Ok so i went through and did all of the following

made sure that all light fixtures were properly grounded i ran a ground lead from the little screw in the light body directly to the chassis. (did not fix issue )

opened up the relay and ran some 800 grit on the contacts ( see picture ) reinstalled and this did not fix the issue.

took off the cover to the steering column to manually activate switch and... by god it worked.


so end result is i'm not sure what was causing the problem my guess was the switch was blocked by the steering column cover. but thats just a guess.

 

[LAMBCRUSHER]

Ask LAMBCRUSHER

ground the light fixture bucket. I added a ground wire to the turn signal housing- they relyed on the metal bit to do it, but after 30 years or so, they don't. you have to help the voltage get to where it is needed....

 

[LAMBCRUSHER]

well I stand corrected...in my place.

 

[billstoudt]

an interesting sidenote (regarding the grounding of the relay housing ) my relay worked fine when not bolted onto the chassis.

 

[billstoudt]

just like to report that 2 days and 100 miles later and the blinkers are still working fine. apparently i killed the gremlin. BBQ BOY i hope you get yours figured out.

 

[LAMBCRUSHER]

an interesting sidenote (regarding the grounding of the relay housing ) my relay worked fine when not bolted onto the chassis.

something nearby is using it as a ground...might try to clean up the rest of the grounds in that area; maybe just add a jumper to the under dash ground points and scratch the paint away from where switches are mounted...sometimes, just undoing the connection and reterminating it(even a bolt) can break up the corrosion- 12 volts is relatively weak...