Replaced the headlight connector on my car; Is it a definite solution?

I got the servicing of my 2017 Ford Figo done a few weeks after I noticed the headlight connector getting burned and was informed that the entire loom/wire had to be replaced to rectify it

BHPian AYP recently shared this with other enthusiasts:

One of the headlight connector of My Ford Figo 2017 model got burnt and the headlight stopped working. A few pics of the burnt connector-

I observed this sometime late last year. I am not using high wattage bulbs. I got the servicing of my car done a few weeks after I noticed this and was informed that the entire loom/wire had to be replaced to rectify it. The estimated cost was 15k-18k. However, after the service, the headlight started to work again. I am not sure if the SA got some adjustment done to it(he never mentioned anything).

However, a couple of days, it went kaput again. This time, I took to an FNG who replaced the headlight connector. The wires were spliced and the wiring of the new connector was joined to the car's original wiring and tape was wrapped over the joint. The connector was of Roots brand and costed me 200 bucks. Pics of the same-

I'd like to know your opinion on this work.

1. Is this method safe?

2. Should I ultimately aspire to change the entire loom/wiring?

3. Has anyone else changed only the headlight connector in their car? How has the experience been?

4. A few folks have suggested me to get the entire wiring change to be on the safe side. While I can't deny that changing the entire loom would be the better option, but I went through a lot of YouTube videos and Reddit only to realise that this method of changing only the connector is quite common and folks have done this on much more expensive cars. One example-

5. Any other pointers shall be appreciated.

Here's what BHPian sagarpadaki added to the discussion:

Yes, replacing only the H4 connector is safe, no need to change the entire loom. Roots is a reputed brand. However, I suggest you get the connection joint soldered and wrapped in heat shrink. Most garages just splice the wires, join them by twisting the strands and put a roll of insulation tape. But this is not the right way and over the time with exposure to heat and moisture the tape will get undone and may cause a short.

Meanwhile, BHPian Jeroen said this regarding the matter:

In general soldering of wires on cars is frowned upon. Use proper splicing techniques and connectors.

There are two reasons: one is that although soldering appears to be very easy, very few mechanics do it properly.

You need to have the correct soldering gun, temperature, solder, flux and know how. Poor soldering work will cause resistance, corrosion and breakage.

The second reason is that even the best made wire soldering remains brittle and vibrations, heat, humidity and so on will take effect over time.

So crimp connections are the recommended way of splicing car wire looms.

Jeroen

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