Hi JCF
Please check supply voltage and polarity of the converter.
If all ok the led must blink when converter is powered on.
Bluetooth module name HС-06 or jdy-33-spp ( spp33)
If led is not blinking then you need to measure voltage between pins 1 and 2 of the service connector
http://max.pilotpowersupply.com/wp-c.../pinout_en.jpg
there should be 5 volts.
If no - then protective diode dead and it needs to be replaced. In this case make photo of your converter from processor side in good resolution and attach it or send it to email - i'll mark control points for you.