radio problems

[ds1950]

hi i'm new here hi all i have 2001 pt cruiser i tried to remove the stock stero to have a newer radio and while exchanging i noticed pci wire connector i do not know where this connects to on new radio and somehow don't my interior lights don't come on ( the ones that turn on when door opens ) the radio does not turn on a message appears on the odometer saying (no fuse) but all fuses were in place has anyone had this problem or can tell me why i'm having this problem any help will be appreciated

[MX-5]

A fuse has been blown when you were working with the wiring. The BCM body control module knows this.

The PCI communications bus circuit is multiplexed information from the BCM to all the PT's components. They are in constant communication. There are a dozen or so diagnostic codes and tests the OEM radio is capable of. These tests and codes are reported to the BCM via the PCI bus.
If you are installing and aftermarket radio, you will lose this feature. PCI is an OEM feature only.
The PCI bus wire is incorporated into the single wiring harness of the 2002 & newer factory radios.

[ds1950]

how do i know which fuse is blown no of them seem to be burnt or blown fry's gave me a wiring adapter but it was chrylers, jeeps 95 and up

[MX-5]

I guess that fuse #18 in the fuse box under the air cleaner, under the hood is blown.

It's a 20amp fuse with a plastic pull tab on it.

It controls IOD ignition-off draw.

Refer to section 8-11 of the 2001 service manual.