Service manual

87
Switched Outputs
The switched outputs should operate each time a button is pressed, whether the igni-
tion is on or off. To check their operation, press a button while listening to the relays in
the Smart Fuse Block IPX to click. The Relays will operate even if the associated fuses
are opened. Power for these circuits comes from the OEM battery circuit. If the relays
do not operate, check for the presence of battery voltage at the module before going
further. Each of the four-switched circuits is fused individually. If there is a problem with
a particular circuit, check the fuse associated with that circuit.
Courtesy Lights
The courtesy light output should be on when the doors are opened. If the doors are left
opened for more than twenty minutes, they will go off. (If the ignition is on and the
doors are opened, the lights will never go off). To check this output, open the door and
turn the ignition on. Power for this circuit comes from the OEM battery circuit. Check
the Courtesy Light fuse and the presence of ignition and battery voltages before going
further.
Trouble Shooting
Problem Possible Cause/ Solution
Lights or TV do not
come on.
Fuses F3, F4, F6 or F7 7.5 amp open. Check and replace fuse
Listen for relays clicking in module when buttons are pressed. Clicking re-
lays indicate module is working.
Faulty OEM battery feed. Check for power coming from the OEM battery
feed at J6
Check signal line for switch voltage on J7-2. Should be 12 volts and should
drop when button is pressed. If not, check wiring and switch panel. Short
signal line, J7-2, to ground, Lights 1 should switch.
If the above fail to fix the problem, replace module.
Lights and TV do not
go off when ignition is
turned off.
Check ignition input at J3. Should be 12 volts with ignition on and 0 volts
with ignition off.
Courtesy Lights won’t
come on when doors
are open.
Courtesy Light fuse, F2, open, Replace fuse.
Door pin switches not working. Check for 12 volts between pins of J2 when
doors are open.
Check Courtesy Defeat Switch on dash (GM only).
Courtesy Lights won’t
go off when doors are
closed.
Door pin switch stuck or shorted. Unplug J2, lights should go off in 12 sec-
onds.
Check courtesy light switch on head light switch.
If the above fail to fix the problem, replace module.
Courtesy Lights do not
stay on for 12 seconds
Check ignition feed. Should be 0 volts with ignition off. If not check input
wiring.
Panel back lighting not
working.
Check fuse F10. Replace if open.
If the above fail to fix the problem, replace module.