Service manual

8-50 Horns Body and Accessories
2006 LSSV Service Manual Supplement
Horns Inoperative in Blackout (B/O) Mode (cont’d)
Step Action Yes No
11
Replace the blackout (B/O) service light switch. Refer to
Blackout (B/O) Switch Replacement in Lighting Systems.
Did you complete the replacement? Go to Step 13
___
12
Repair the open or high resistance in the (OG) circuit 40.
Did you complete the repair?
Go to Step 13
___
13
Verify the system operation.
Do the horns operate properly? System OK Go to Step 2
Horns Operate in Blackout (B/O) Mode
Step Action Yes No
Schematic Reference: Horn Schematics
1
Did you review Horns Description and Operation?
Go to Step 2
Go to Horn with
Blackout (B/O)
Control Circuit
Operation
2
Connect a test lamp between terminal 86 of the horn interrupt
relay block and ground.
Does the test lamp illuminate?
Go to Step 4 Go to Step 3
3
Replace the horn interrupt relay.
Did you complete the replacement?
Go to Step 7
___
4
1. Disconnect the blackout (B/O) service switch.
2. Connect a test lamp between cavity C of the blackout
(B/O) switch connector and ground.
Does the test lamp illuminate? Go to Step 6 Go to Step 5
5
Replace the blackout (B/O) service light switch. Refer to
Blackout (B/O) Switch Replacement in Lighting Systems.
Did you complete the replacement? Go to Step 7
___
6
Repair the short to voltage in the (OG) circuit 912.
Did you complete the repair? Go to Step 7
___
7
Verify the system operation.
Do the horns operate properly? System OK Go to Step 2