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Perhaps - check both the cluster and the alarm systems
That function is controlled by the alarm/locking box and the cluster itself. You will likely need a PST2 or PIWIS tester to do a diagnostic check on both - as well as checking for fault codes. If you do not have access to one of those then you will likely need the assistance of a shop that one.
Was the cluster lighting okay before the ignition switch change?
Loren replied to Blue 996's topic in 996 Series (Carrera, Carrera 4, Carrera 4S, Targa)Porsche usually sells a half shaft with both CV joints. A lot easier and not as expensive as you might think.
Back to step 1. If you close the car doors and lock the car the cluster should go off in 3-5 minutes. Long by most people's standards. Does it do that?
From the Lost Radio Code FAQ... "CDR-23 (or later): These radios do not have a security code - that is, not that the user enters. These radios are security tested on the MOST (fiber optic bus) system to see if they are the "programmed" radio. The radios are programmed and recognized by the car’s DME and can only be replaced by a shop with a PST2 or PIWIS. These radios will not request a code when battery power is disconnected."
Loren replied to Citgot's topic in 996 Series (Carrera, Carrera 4, Carrera 4S, Targa)996 107 023 54 or 996 107 023 55 - either should work for your car. Though 996 107 023 54 is a discontinued part.
Has the instrument cluster been removed? If so, take it out again and check that all the connectors are snapped in and secure.
In the future please state the model year of the car. Thanks/ Information in the service manual for rear calipers states "Fit brake caliper. Tightening torque 85 Nm (63 ftlb.)"
Another possibility is the ignition switch. Wiggle the switch with the key in it and see if it has any effect.
Have you checked for water damage to the control unit under the left hand seat? Look for corroded grounds and other signs of water damage.