556U, 2001 Altima and 1997 Expedition

If you are installing the 556U, all connections can be made at the R/S harness while bench wiring, and the ring just wraps around the key cylinder. Very straight forward.

easy just connect bypass module red to 12volts and black(blue)  to alarm neg disarm/aux out during start if using a dei alarm thin blue/white wire as to bypass wires there are none when using 556u jus put key in box wire as stated and mount ring around ignition switch  securely then activate rs and the module automatically sends the code from the box to the ign switch thru ring simple these are the easiest bypass mods to use on two of the easiest vehicles to do