2
2. Place the headlamps in the AUTO
position.
Do the low beam headlamp bulbs
illuminate?
Go to Testing
for Intermittent
Conditions and
Poor
Connections
Go to Step 3
3
With a scan tool, observe the DRL Status
parameter in the body control module
(BCM) data list.
Does the scan tool display On?
Go to Step 4
Go to Step 7
4
Test the DRL supply voltage circuit for an
open, high resistance or short to ground.
Refer to Circuit Testing and Wiring
Repairs .
Did you find and correct the condition?
Go to Step 9
Go to Step 5
5
Inspect for poor connections at the harness
connector of the underhood fuse block.
Refer to Testing for Intermittent
Conditions and Poor Connections and
Connector Repairs .
Did you find and correct the condition?
Go to Step 9
Go to Step 6
6
Replace the DRL relay. Refer to Relay
Replacement (Attached to Wire
Harness) or Relay Replacement (Within
an Electrical Center) .
Did you complete the repair?
Go to Step 9
-
7
Inspect for poor connections at the harness
connector of the BCM. Refer to Testing
for Intermittent Conditions and Poor
Connections and Connector Repairs .
Did you find and correct the condition?
Go to Step 9
Go to Step 8
8
Replace the BCM. Refer to Control
Module References for replacement,
setup and programming.
Did you complete the replacement?
Go to Step 9
-
9
Operate the system in order to verify the
repair.
Did you correct the condition?
System OK
Go to Step 3
2007 Hummer H3
2007 ACCESSORIES & EQUIPMENT Lighting - H3