Here's a quick, simple fix that uses the square cube Bosch-type relays. I use the 60 amp ones, not because the lights need that much capacity, but the wires that come with the included mounting bracket are larger.
Here's the relay I use:
www.ebay.com/itm/283063032082?This ad is for a 30 amp, but the same type relay in 40-60 amp fits the same plug.
Have fun!
Jerry