Central Lock problem please help (now lock heater parts needed)

[BBBurban at aol.com]

Thanks for the reply but turns out I found the problem... The fuse kept 
blowing and I was able to trace the problem to the passenger side door lock 
heater.  the control unit and the microswitch were both able to be plugged in 
without a problem but when I plugged in the heater it blew the fuse.  Does 
this automatically mean it is the heater or could it be the control unit is 
defective and the defect doesn't appear till I complete the circuit?  

Anyone have some extra parts kicking around for this system or know what I 
should be replacing?  

TIA
Hank 90q20v