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im getting a pz2471 interior lamp fault...


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PZ2471 is the interior lamp fault. Check the 10amp fuse (INST LPS) in the underhood fuse/relay center. If it is OK, then remove the interior lamp relay in the trunk fuse/relay center. Measure the voltage at the orange wire (A9). If you have battery voltage, then measure the voltage at terminal B7 (dark blue wire). If there is less than 1 volt, replace the relay.

If you do not have battery voltage at the orange wire, look for an open or short to ground in the supply circuit (680 I believe).

Post back your findings.

'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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