I check the DC resistance on my pickups with a multi meter. They are usually installed in the guitar though. You just use a guitar cord and measure the reistance on the 1/4 plug. I don't think it would be any different for an uninstalled pickup. It would tell you if you have continuity in the pickup. At least you would know that electricity flows through the pickup.
I am not an expert, and the pickup might still not work.
I am sure some of the electronics guys here will know.
The Blues is alright!
Guitars: 1968 Gibson SG, 2005 Gibson SG Standard, 1990 Gibson ES335,2006 Gibson LP Classic Gold top, 2004 Epiphone Elitist LP Custom, 1996 Gibson Les Paul Standard. 2001 Epiphone Sheraton II, 2007 Epiphone G400.
Fender Strats: 1996 Fender 68 Reissue CIJ, 2008 Squier CV 50s, 2009 Squier CV 50s Tele Butterescotch Blonde
Amps: Blues Junior Special edition Jensen in Brown Tolex with Wheat front, 65 Deluxe Reverb reissue,1970 Sonax reverb by Traynor, Avatar Custom 2/12 Cabinet with Eminence Legend V1216 speakers,
2008 DSL100 Marshall Amp , Fender Super Champ XD,Fender Vibro Champ XD
Effects and Pedals: Fulltone Fulldrive II, Fulltone OCD, Fulltone Mini Deja Vibe, Fulltone Fat Boost, Dunlop Crybaby Wah, Boss DS1, Boss DD20 Giga Delay, Boss TU2 tuner, Boss BD2, Ibanez TS9 Tube screamer, Zoom 505. Radial tonebone hot british.