Rlv430a

I would install a new Honeywell Baseboard RLV430A made to replace my old. So I removed the old, but Duh i forgot to note the corresponding colors L1 L2 T1 T2. So now I have 4 son, blue white black and red (or purple? I cannot say) I tested with my meter white and blue say 220 ... if I try any connct voltage tester is approximately 5V or so .. . thrmostat my new son is only two blacks. Thank you

It seems that the thermostat is 120 volts and disconnect one leg of 230 volts you.
The exchange against a 230-volt one.
2 Your son who would read 220 volts L1 and L2 are the other 2 T1 and T2

You have the wrong type of thermostat. You must use one designed for baseboard heaters.