Could LED sealed beam melt a headlight plug? (fixed!)
Posted: Sun Jul 07, 2019 6:07 pm
Driver's headlight won't work on low. On high, both sections work.
Swapped the driver and pass'r lights, problem persists, so it's not the bulbs.
Put a brand-new switch, but that wasn't it (whoops)
Looked at the plug (brown one that the sealed beam plugs into), and the brown plastic is a bit melted.
Hit it with multimeter, and with low-beam on, looking at the plug head-on like this:
| _ |
The middle and right parts both read ~6.5V. it was alternating also, would go near-0 then come back to 6.5 every 1 second or so
Left part read 0
The melting was near the middle part
Passenger reads
| _ |
Left: 12.5V constant
Middle: nothing
Right: jumps to like 0.8 then sits back at 0, every time I check it
Passenger plug is ok and no melting
Plug being hot means it is encountering resistance, right? Could it be from the LEDs? Had halogens for years previously without issue
Had these LEDs in for a couple years or so
This problem appeared then went away about 6 months ago. Thought it was some shabby wiring which I replaced
Also: the driver's retract relay (right in front of battery) was collecting rainwater down in its wire loom. I dried it out and re-sealed it up. However, the up/down function has always worked fine. Not sure if that has anything to do with the light issue
They are Trucklite 27450C
Sure want to keep them if possible, super dark around here with a lot of deer
Thanks for readin my post
Swapped the driver and pass'r lights, problem persists, so it's not the bulbs.
Put a brand-new switch, but that wasn't it (whoops)
Looked at the plug (brown one that the sealed beam plugs into), and the brown plastic is a bit melted.
Hit it with multimeter, and with low-beam on, looking at the plug head-on like this:
| _ |
The middle and right parts both read ~6.5V. it was alternating also, would go near-0 then come back to 6.5 every 1 second or so
Left part read 0
The melting was near the middle part
Passenger reads
| _ |
Left: 12.5V constant
Middle: nothing
Right: jumps to like 0.8 then sits back at 0, every time I check it
Passenger plug is ok and no melting
Plug being hot means it is encountering resistance, right? Could it be from the LEDs? Had halogens for years previously without issue
Had these LEDs in for a couple years or so
This problem appeared then went away about 6 months ago. Thought it was some shabby wiring which I replaced
Also: the driver's retract relay (right in front of battery) was collecting rainwater down in its wire loom. I dried it out and re-sealed it up. However, the up/down function has always worked fine. Not sure if that has anything to do with the light issue
They are Trucklite 27450C
Sure want to keep them if possible, super dark around here with a lot of deer
Thanks for readin my post