Headlight Bulb Connector

Phil A

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Jun 19, 2022
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Spain
Hi folks. I noticed my right headlight wasn't working the other day on my 2011 S10 so went out and bought a new set of bulbs. I noticed the black connector cap was looser than on the other side and appeared to be a slightly melted and part of the cover has broken off. I replaced both bulbs and connected and started the engine. The lights didn't come on but after about 15 seconds they did. I noticed what looked alike a little smoke coming so turned off. It's very cold here so tried again so I could take a photo but this time the lights didn't come at all so could be the fuse. Someoner has replaced them before as the old bulbs don't match brand and they hadn't put the dust covers on properly. What is the easiest way to replace this plastic connector? Is it part of complete wiring assembly?DSC_0624.jpg Thanks
 

SparrowHawkxx

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Oklahoma
Yes, its part of the headlight harness assembly. (Item 5 in the headlight parts diagram.)
In the US, there was a recall on the Gen 1 bikes to replace the headlight harness assembly for this same problem.
The new harness had a better connector for the headlight bulbs.
How many miles on the bike? Are you the first owner? You might check to see if a recall was done.

The connector at the other end of that harness is inside a black rubber boot behind the upper cowling on the right side of the bike.
 
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bimota

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its a small harness for the lights, like the one below not that expensive but i think there was a recall for this harnees

rob
 

Phil A

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Jun 19, 2022
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Spain
Yes, its part of the headlight harness assembly. (Item 5 in the headlight parts diagram.)
In the US, there was a recall on the Gen 1 bikes to replace the headlight harness assembly for this same problem.
The new harness had a better connector for the headlight bulbs.
How many miles on the bike? Are you the first owner? You might check to see if a recall was done.

The connector at the other end of that harness is inside a black rubber boot behind the upper cowling on the right side of the bike.
89,000 KM's , 2 previous owners. No record of any recall
 

Phil A

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Jun 19, 2022
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Spain
its a small harness for the lights, like the one below not that expensive but i think there was a recall for this harnees

rob
Brilliant. Will probably get this one as I'm in Spain, so no import charges
 

SparrowHawkxx

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89,000 KM's , 2 previous owners. No record of any recall
Yamaha should install the revised harness for no charge if it has not already been done.
With a new harness you would get new connectors at both ends of the wiring harness.

The connector at the other end of that harness has been known to do the same thing. The female connector starts to open up causing a resistive connection and overheating.
 
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Phil A

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Jun 19, 2022
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Spain
Yamaha should install the revised harness for no charge if it has not already been done.
With a new harness you would get new connectors at both ends of the wiring harness.

The connector at the other end of that harness has been known to do the same thing. The female connector starts to open up causing a resistive connection and overheating.
Thanks. I’ll check before ordering one
 

jeckyll

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Lotusland
Instead of fighting the dealer (apparently the headlight harness recall was done on my 2012 but it melted anyway) I just got a standard H7 connector from an autoparts store. Helps to have a friend because it's tight in there, but very basic fix. I want to say it was a $10 part (maybe less)

I think it took 20 minutes and we drank some beer while doing it.
 

Cycledude

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Rib lake wi
Instead of fighting the dealer (apparently the headlight harness recall was done on my 2012 but it melted anyway) I just got a standard H7 connector from an autoparts store. Helps to have a friend because it's tight in there, but very basic fix. I want to say it was a $10 part (maybe less)

I think it took 20 minutes and we drank some beer while doing it.
Well I definitely would have taken it back for repairs under warranty the second time, I’m just guessing but I bet they never replaced anything the first time but still collected money from Yamaha.
 

jeckyll

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Well I definitely would have taken it back for repairs under warranty the second time, I’m just guessing but I bet they never replaced anything the first time but still collected money from Yamaha.
Sure, it's possible. but I value my time, this was the quickest most effective way to get it solved :)

My bike is originally from the US, but was imported to Canada. Recall stuff can be tricky. <shrugs> You got to fight your battles.
 

2daMax

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Penang, Malaysia
Mine melted as well on the left side. Since I have no access to a recall claim, there were just 2 options for me:

1. Use LED bulbs as the temperature at the connector pin is much much lower vs halogen. (I am using this now)
2. If u want continue using Halogen bulbs, get the Ceramic Connectors headers to replace the melted ones.

Now, why the original melts is explained by Yamaha due to difference in thermal expansion. The connector is made of brass which expands faster than the steel on the H7 bulb at the same hot temperature. At the operating Halogen temperature, the brass connector becomes a loose fit. This causes an air gap to form which causes current to jump (arching). The arching temperature is really high and is the cause for the melting.

Using LED bulbs, it will not reach that hot temperature for the air gap to form.

These days, with better technology, u can get a LED H7 without those wires sticking out or with a giant heatsink sticking out. It's a drop in replacement and allows the dust cover to be fitted in like an ordinary H7 halogen.

LED H7 bulbs without bulging heat sink and wires sticking out.
In case u need a good working reference, Novsight In-Line N63 H7. This has a mini fan to keep the LED chips from overheating and cutting short the lifespan. A bad example that doesn't fit the Tenere is this model Auxito GFM H7. It's base diameter that contains the fan is just too large to fit the Tenere's lamp housing. What's great the Novsight (and also Auxito) is that is non-polarity. Plug in either + or - , it will still light up.

There are some without the Fan, and I suspect that if it gets too hot, it will drop the brightness for self preservation. They are cheaper too, much cheaper.
 

Phil A

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Jun 19, 2022
Messages
16
Location
Spain
Mine melted as well on the left side. Since I have no access to a recall claim, there were just 2 options for me:

1. Use LED bulbs as the temperature at the connector pin is much much lower vs halogen. (I am using this now)
2. If u want continue using Halogen bulbs, get the Ceramic Connectors headers to replace the melted ones.

Now, why the original melts is explained by Yamaha due to difference in thermal expansion. The connector is made of brass which expands faster than the steel on the H7 bulb at the same hot temperature. At the operating Halogen temperature, the brass connector becomes a loose fit. This causes an air gap to form which causes current to jump (arching). The arching temperature is really high and is the cause for the melting.

Using LED bulbs, it will not reach that hot temperature for the air gap to form.

These days, with better technology, u can get a LED H7 without those wires sticking out or with a giant heatsink sticking out. It's a drop in replacement and allows the dust cover to be fitted in like an ordinary H7 halogen.

LED H7 bulbs without bulging heat sink and wires sticking out.
In case u need a good working reference, Novsight In-Line N63 H7. This has a mini fan to keep the LED chips from overheating and cutting short the lifespan. A bad example that doesn't fit the Tenere is this model Auxito GFM H7. It's base diameter that contains the fan is just too large to fit the Tenere's lamp housing. What's great the Novsight (and also Auxito) is that is non-polarity. Plug in either + or - , it will still light up.

There are some without the Fan, and I suspect that if it gets too hot, it will drop the brightness for self preservation. They are cheaper too, much cheaper.
Thank you for the detailed explanation. I have ordered a headlight wiring harness and it should arrive this week and hope it fixes it, but I will look into using LED bulbs for the future
 
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