51 no-caster pickups low impedance?

[Der Groovemeister]

Hope somebody can shine a light on this for me.
I put Fender Custom Shop 51 no-caster pickups in a Squier Affinity Tele. They sound great, but the neck pickup is rather weak in output. I changed the wiring to standard Tele specs (with 250 K CTS pots). Now if i roll of the tone pot the neck pu sounds very thin (no lows). So i removed the tone pot from the neck pu. Only on the bridge (it works good on that).

Now when i use fuzzes or lpb1 booster or electra overdrive the neck pickup sounds also very thin with no lows. Only with my Overdrive 250/Dist + clone it sounds good. Does that have something to do with hi or low impedance or is there something wrong with the neck pickup?

Thanks in advance!

[Gus]

Check the resistance of the pickup.  You could have a broken wire at the coil or coil to eyelets or back connection at the eyelets to the wires.

[Der Groovemeister]

You're right! There's a loose connection somewhere in the pickup. If I measure the resistance it measures nothing. The other pu measures 7.3 K. How is it possible that I get any sound at all?