I am having a nightmare trying to get this vehicle to start.

The customer was driving on the red key for a while and now the key light stays on solid. There is no ECU for this vehicle so I know I can direct wire the pump, but I would prefer to do a better fix.

I have the original yellow immo box and key and I also made another chip.

Can anyone advise the best way to get it going? Should I look for another yellow immop and key?

Thanks for help

Malva