Turn the water off to the faucet s supply lines under the sink.
Delta faucets repair instructions for shower.
Turn the faucet handles on to relieve the remaining water pressure.
Unscrew the stem bonnet nuts.
Delta bathroom and kitchen faucets with two handles often are stem style faucets that include a neoprene valve seat and spring the fit into the faucet below a cartridge like insert stem.
This is different from a true cartridge style faucet which closely resembles a stem faucet but does not have valve seats and springs.
If your delta faucet is jammed you may be able to fix the problem by disassembling the faucet until you find the piece that is jamming the faucet.
If you don t have a local plumbing supply store her.
Delta plastic acrylic handles will have a plastic index button covering a handle screw.
This video is about how to fix a leaky shower faucet for under 2.
If this is a broken piece you will need to purchase a repair kit or other replacement parts.