Blinker problems

[71GTX440]

do the turn signals flash when you turn them on and the dash light is on but does not flash ?

Yes! That is the problem. Going to try the alligator/ground wire idea. If it works, then I will rebuild the lights wiring harness and make sure the valance is a good ground

 

[wahya]

I rebuilt both lights, by themselves, the system works. I install both lights, I get the flasher fault. Right flasher light stays lit on the dash

I asked about this because I had an issue with my 71. Had put everything together and lights worked. A few weeks later, I noticed that the left turn signal did not flash, the light on dash stayed lit. I moved the bulb a little and it flashed. I removed bulb. cleaned socket and contacts. Still not working after that. I replaced bulb and its been working since then.

 

[bigmanjbmopar]

Yep usually just a wrong bulb type it happens or bulb is bad, ohmmeter check would be first before even sticking it in.

 

[71GTX440]

No, the whole outer housing. The screws that mount the housings into the valance are the ground path.

ahh, ok, I will clean the housing openings and clean up the screw locations.

 

[71GTX440]

They always say if it's goofy it's probably a ground. When I'm having these issues I just use a jumper wire with an alligator clip, clip it to the negative post or a known good ground then manually ground the suspect housing.

so.....I grounded the turn signal housing from the backside by using a longer screw and clipping the alligator clip onto the end sticking up and ran the other end of the wire to a known good ground point. Low and behold, the blinkers worked properly. Unfortunately, it doesnt answer the question on how it just stopped working properly. I can put in just one turn signal light, one on the right or one on the left and there are no issues, I install both and the problem shows up.

 

[747mopar]

I'd say whatever ground you had became loose or corroded. Just take the mounting screws out and clean the surfaces and apply some electrical grease to prevent further corrosion. In some cases I've even drilled and tapped a ground right to the housing then grounded them to the chassis.

 

[72RoadrunnerGTX]

I have also found with those particular front turn/park housings that high resistance can build up between the bulb socket shell and the pot metal housing due to corrosion. A crimp fit initially, forcing a slight back and forth twisting of the shell in the housing can restore continuity temporarily. As mentioned the ground path for the 1157 two element bulb is through the socket shell-pot metal housing-housing mounting screws to front valance. I’ve run external ground leads to the housings before to supplement this connection.

 

[Car Nut]

Have you checked the fluid level, could be low.

 

[71GTX440]

I'd say whatever ground you had became loose or corroded. Just take the mounting screws out and clean the surfaces and apply some electrical grease to prevent further corrosion. In some cases I've even drilled and tapped a ground right to the housing then grounded them to the chassis.

Your idea sounds like a good fix, I can hide ground wife behind the valance.

 

[71GTX440]

Have you checked the fluid level, could be low.

View attachment 389012

completely forget about that fluid check, maybe I can tell how bad I am burning the blinker fluid with a good bag full of exhaust to check as well.

 

[oldbee]

'71gtx- spelling on previous post, ur wife won't fit behind valence! LOL...

 

[WileE]

I always say, check ALL bulbs & grounds before anything else.

 

[Shorthorse]

I always say, check ALL bulbs & grounds before anything else.

Absolutely and like 747mopar said, "if it's goofy it's probably a ground." If you follow the Electric & Ignition section, you will see an overwhelming number of posts where grounding is the issue/cure. The only thing you have to remember when dealing with lights is that an incandescent bulb is nothing but a resistor that glows. So when checking power leads, especially continuity with a volt meter, you have to remove all the lights in the circuit or you will get a false reading to ground.

 

[71GTX440]

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I have also found with those particular front turn/park housings that high resistance can build up between the bulb socket shell and the pot metal housing due to corrosion. A crimp fit initially, forcing a slight back and forth twisting of the shell in the housing can restore continuity temporarily. As mentioned the ground path for the 1157 two element bulb is through the socket shell-pot metal housing-housing mounting screws to front valance. I’ve run external ground leads to the housings before to supplement this connection.

o you just use a longer machine screw and solder a wire onto the back side and run a ground with an eyelet to a chassis ground?

 

[72RoadrunnerGTX]

Same concept, in my case I secured a lead with a ring terminal to a housing rib with a pop rivet. Didn’t want to break the fresh paint on the valance with the mounting screws. On the ‘72’s there is an unused ground provided in the forward lighting harness at the turn signal housing connector, connected the new housing ground there.

 

[Nacho-RT74]

On the ‘72’s there is an unused ground provided in the forward lighting harness at the turn signal housing connector, connected the new housing ground there.

74 Chargers too, not earliers though

 

[Nacho-RT74]

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