Do the off-road lamps illuminate?
Go to Step 15
Go to Step 8
8
Connect a 3-amp fused jumper wire
between the battery positive circuit and
the off-road lamp supply voltage circuit of
the off-road lamps relay.
Do the off-road lamps illuminate?
Go to Step 9
Go to Step 11
9
Test the off-road lamp relay control circuit
of the off-road lamps switch for high
resistance, short to ground or an open.
Refer to Circuit Testing and Wiring
Repairs .
Did you find and correct the condition?
Go to Step 21
Go to Step 10
10
Test the ground circuit of the off-road
lamps relay for high resistance or an open.
Refer to Circuit Testing and Wiring
Repairs .
Did you find and correct the condition?
Go to Step 21
Go to Step 11
11
Test the battery positive voltage circuit of
the off-road lamps relay for high resistance
or an open. Refer to Circuit Testing and
Wiring Repairs .
Did you find and correct the condition?
Go to Step 21
Go to Step 12
12
Test the ground circuit of the off-road
lamps for high resistance or an open. Refer
to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?
Go to Step 21
Go to Step 17
13
Inspect for poor connections at the harness
connector of the off-road lamp. Refer to
Testing for Intermittent Conditions
and Poor Connections and Connector
Repairs .
Did you find and correct the condition?
Go to Step 21
Go to Step 18
14
Inspect for poor connections at the harness
connector of the off-road lamps relay.
Refer to Testing for Intermittent
Conditions and Poor Connections and
Connector Repairs .
Did you find and correct the condition?
Go to Step 21
Go to Step 19
2007 Hummer H3
2007 ACCESSORIES & EQUIPMENT Lighting - H3