turn signal/ marker light problem

[Coug]

The ground return leads have to be hooked to a proven good ground.

As an example the front park/turn lamp has more than one circuit, all of them use a single ground.

It that is faulty, current will find it's way thru another light and cause weird operations.

A bit of corrosion or a loose bolt will do that.

A lot of tactical electrical systems weren't designed to run LED lighting.

Most of the problems with them stem from the LACK of current used by them, and any questionable connection manifests as the problem.

Personally, I don't see the attraction in converting them into the system. Lifespan over incandescent? Cool factor?

It's your vehicle, indeed.

G744

There is one real advantage to using LED for the brake lights. The OEM brake light switch isn't really that great, and has a higher failure rate than it really should due to the overly complicated design. Using LED bulbs does reduce current and helps the brake switch last longer.

Update on diagnosing this. If I disconnect the parking light lead the turn signals will now flash when the headlights are on. If I reconnect the parking light lead the turn signals ceases to flash when the headlights are on. I'm looking at the wiring diagram and I cannot fathom what could be causing the parking lights to prevent the signals from flashing when the headlights are on. The turn signals work fine when the headlights are off.

So sounds like you've found a bad electrical path. There is a chance the issue might be somewhere else, but the light fixture is easy to access and not all that complicated (though can be slightly annoying to disassemble if there is corrosion)

 

[maxpower_365]

The ground return leads have to be hooked to a proven good ground.

As an example the front park/turn lamp has more than one circuit, all of them use a single ground.

It that is faulty, current will find it's way thru another light and cause weird operations.

A bit of corrosion or a loose bolt will do that.

A lot of tactical electrical systems weren't designed to run LED lighting.

Most of the problems with them stem from the LACK of current used by them, and any questionable connection manifests as the problem.

Personally, I don't see the attraction in converting them into the system. Lifespan over incandescent? Cool factor?

It's your vehicle, indeed.

G744

Thanks G744. I'll try cleaning and sanding the contacts for the common grounds on the front park/turn lamp. The thing that confuses me is that it does the same thing for both the right and the left turn signals. So it seems like the issue probably isn't at the common ground at the front park/turn lamps, but possibly wherever those go back and ground to the frame (do they both come back to a single point or are there different paths back to the frame for the left versus the right signals?).

Regarding the LEDs versus incandescents, yes, it's mostly because they look cool. However, it's only cool if they work properly. So, I hope I can get this working. Solving the puzzle is part of the fun.

 

[G744]

Fiberglas fenders & such can be deceiving...

Make sure you have a very low resistance circuit from the bulb socket to the metal body/frame.

G744