Melted fuse - not blown, Resistance at fuse box? Options

[FlacaProductions]

Greetings all,

Please excuse the first of what will probably be a small stream of posts as I'm finally with the 914 for a few days so I'm working through a few things.

First item:
I changed out the bulbs in my pilot driving lights that are in the stock positions - put there by a PO or probably Brad Mayeur. I changed them to standard H3 55w lamps but went to a little more blue color to match the LED headlights I have installed along with the spoke works relay to deal with rapid flash and other side effects of the LEDs.

The fog light fuse - 3rd from the right - gets pretty hot and will eventually melt but does not blow.
Could it be as simple as high resistance at the fuse location in the fuse box?

It appears - through trouble shooting - that it only happens when the drivers fog light is installed. if it's not and only the passenger lamp is installed, no issue. Different lamps show the same behavior.

Thanks for the input!

[Spoke]

Here's the basic circuit for the 914 low/high beams and foglights. A single relay is used for the pair of low, high, and foglights so the drive circuit is the same for the low/high beams and the foglights.

The only thing changed is going from 35W fogs to 55W fogs. A 35W foglight burns 2.5A and a 55W foglight burns 4A. Thus changing from 35W to 55W increases the single fuse current from 5A to 8A. That in itself is not significant.

Recall that the fuel pump fuse is 25A so a high current fuse should not be an issue. Running two 55W foglights should not be an issue with a 10A or 15A fuse as long as the fuse holder is clean and the connections are secure. The only improvement that could be made is to use separate fuses for each light like the low/high beams.