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Hazard light issue


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1985 Dodge Power Ram W150. was checking lights and such in prep for inspection and discovered the hazard lights are ...


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Old 12-02-2016, 12:07 PM   #1 (permalink)
 
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Default Hazard light issue
1985 Dodge Power Ram W150.

was checking lights and such in prep for inspection and discovered the hazard lights are dorked up.

1. the left rear hazard is VERY dim, can barely see it...
2. the right rear hazard doesn't flash at all
3. Both front hazards work fine...

WTH? where to start isolating? bulbs (fingers crossed), wiring?

Bruce


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Old 12-02-2016, 03:06 PM   #2 (permalink)
 
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update:

After pulling everything apart, found some old crusty connections, missing one bulb all together, one was broke a little (surprised it worked at all).

Replaced all bulbs (1156 and 1157 were the model numbers I needed). brakes, backup, turn and running lights all function fine...

The hazards are still displaying the "WEAK" on left side and "NADA" on the right side. gotta be wiring up stream, I suppose.

I did discover the following (see pics) the right side lower light, has a connector with dual connections whereas the left side lower light has a single connector. the 1157 bulb (dual filament) works with that double connector light on the right, but i'm not sure its correct. additionally, right side (obviously) has 3 wires coming into it, left side only 2.

Does anybody know what it is suppose to be ?
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Old 12-02-2016, 03:07 PM   #3 (permalink)
 
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Old 12-02-2016, 03:34 PM   #4 (permalink)
 
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i would be looking at the ground wires where they join together. you can try running a temporary ground to them anywhere you can get a good ground. it is common for moisture to get into the ground wires where they split behind the taillights.

as far as the connector goes they most likely had a rusty socket or something and needed to replace it. i personally did that exact same thing on my truck. 1157 bulbs all around. that way i never have to keep 1156 bulbs on me for the reverse lights.


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Old 12-02-2016, 03:49 PM   #5 (permalink)
 
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hey woolfie,

thanks for the response (again). Let me make sure I got this right (i'm by no means familiar with the intimate wiring of this beast).

the only ones that aren't working, are the hazards which appear to be using the upper light. I'm thinking, if there was a ground issue, I would have issues with the brake, turn and running lights as well, no? all 4 light functions seem to be using only the upper light...
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Old 12-02-2016, 04:04 PM   #6 (permalink)
 
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upper lights are turn signals bottom lights are reverse lights.

are you sure turn signals and marker lights are working when on together? a bad ground can cause lots of strange issues. even with a bad or week ground a light may work but be dim or have strange things happen.


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Old 12-02-2016, 04:33 PM   #7 (permalink)
 
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when you say marker lights, are you referring to the lights on the sides of the truck...I guess i'm not clear what you're saying on that one...

where should I start chasing a bad ground ? sounds ominous
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Old 12-02-2016, 04:51 PM   #8 (permalink)
 
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NEW DEVELOPMENT:

Both hazards are flashing BUT they are exceptionally dim...cant see them unless you get right up on em to see that they're flashing...that may have been the case all along, I just didn't recognize it...DOH!!!

I checked the lights with the headlights on, brake lights pressed and turn signals engaged...all seem to work...front and back...

I don't suppose there is a relay or anything that controls those hazards is there ? haven't dug my book out yet...I have a Haynes, but man, that thing doesn't have much detail to it at all...I get more info here from you fellas...

bruce
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Old 12-02-2016, 05:03 PM   #9 (permalink)
 
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I am still thinking it is a bad ground. You can even test it with test light. Ground the test light wire and just touch the metal on the light socket. The test light will most likely flash with the light if there is a bad ground.
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Old 12-02-2016, 05:11 PM   #10 (permalink)
 
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i'll give that a whirl...just started raining here, so will have to wait until that's over...

thanks for the responses...

dude, you're always on here answering the tuff questions...
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