I don't know the answer but I have a 99 Crew Cab SD with a 7.3 that did not originally come with keyless entry. My question is how do you wire the relay into the wires on the driver side door switch?? I have tried different combos with no luck. The signal to the relays is VIA an alarm system.

Thanks,
Dave Shrum

http://www.carstereo.com/help/images/locks_5_wire.gif

Thank you. I didn't try cutting the wire and I have just been blowing fuses. I will try that tomorrow.

Got it. Diagram was close but on one of the relays in the picture needs to look like the other one and not different. Other than that it worked perfect.:)