negative voltage from dc power supply

[jball85]

Im measuring voltage from a dc power supply after having a mishap with a neovibe (exploding 1000uf caps) My black lead is on the tip and my red is on the sleeve. When I reverse the leads my dmm reads + 27 volts. Negative -27 volts measured with black on the tip. Does this mean that my jack should be wired backwards for the neovibe (red tip, black,sleeve). I know this sounds confusing, but its the only way I figured that the caps would explode like that. This all started with a diode bridge installed backwards, that snapped a leg after I removed it. So I powered the neovibe up without the db, wired red to positive pad,  black to negative pad where the bridge used to be and the big caps blew up consecutively.

[jball85]

In order to fix this I will replace the caps and switch the wires, is there anything else that will be damaged from the reversed polarity?

[jball85]

fixed