H3 Checking Signal Lead, Passenger Compartment Ceiling Light

Switch ignition off.
Remove central locking relay D/G.




Set ceiling light switch to activate when door opens.




Connect a voltmeter to position LA and position 31.
Ohmmeter should read approx. 0 volt.

Connect ground to position LA on the relay base terminal by bridging connection from position 31.
Interior lighting should activate.

If interior lighting comes on: Go to step G4. G4 Checking If Central Locking System Works

If voltmeter reads more than 1 volt:
Short-circuit in signal lead between relay base position LA and passenger compartment ceiling light 10/22:3.
Correct fault or replace ceiling light signal lead. Replace central locking relay D/G.

If the inner lighting does not come on:
Open-circuit in signal lead between relay base position LA and passenger compartment ceiling light 10/22:3.
Correct fault or replace ceiling light signal lead. Replace central locking relay D/G.