Oh, and once you get the connections sorted, what type of batteries did you pull out? If the were something other than flooded lead acids, you might need to check and change the charger profile.
I have a Zivan charger, so someone with a Delta Q would have to help you there.
I actually had a zivan charger before I went to lithium, but I’m working on a friends car that has a delta. PM @inwo, he can sometimes repair them. If not I have two used zivan chargers I can part with.
You can always open the hood and check the turn light cables leading to the bulb terminals with a multimeter to see if signal is reaching out. Then work your way in. You can always just bypass everything and get an external flash controller, a switch, and some LED light strips off Amazon for for like $25. Just pay attention to the Voltage required and make sure you got an extra lead for it.