Lighting Problem (no hi beams)
#1
#2
If the fuses are good, you need to go out there with a voltmeter and trace the circuit, beginning at the fuse, which should have voltage. I don't know what sequence you replaced the parts in (bulbs first?), but there was once in my life that I fixed this problem on a pickup that for no apparent reason, managed to burn out both low beams at the same time. Who would have ever thought...........
#4
When you check the fuse use an ohm meter not your eye. If the fuse is ok the next steps.
Measure the resistance between LH headlamp C147-2, circuit 12 (LG/BK), and fuse junction panel fuse 33, pin 2.
l Is the resistance less than 5 ohms?
è Yes
RECONNECT the LH headlamp. Go to «C3».
Place the headlamp switch in the ON position.
2 Verify the multi-function switch is in the high beam position.
Measure the voltage between fuse junction panel fuse 33, pin 1, and ground.
l Is the voltage greater than 10 volts?
è Yes
REPLACE the headlamp bulbs. TEST the system for normal operation.
Measure the resistance between multi-function switch C254-12, circuit 632 (GY/O), and fuse junction panel fuse 33, pin 1.
l Is the resistance less than 5 ohms?
è Yes
REPLACE the multi-function switch. TEST the system for normal operation.
Measure the resistance between LH headlamp C147-2, circuit 12 (LG/BK), and ground.
l Is the resistance greater than 10,000 ohms?
è Yes
RECONNECT the LH headlamp bulb. REPLACE fuse junction panel fuse 33 (15A). Go to «C6».
Measure the resistance between LH headlamp C147-2, circuit 12 (LG/BK), and fuse junction panel fuse 33, pin 2.
l Is the resistance less than 5 ohms?
è Yes
RECONNECT the LH headlamp. Go to «C3».
Place the headlamp switch in the ON position.
2 Verify the multi-function switch is in the high beam position.
Measure the voltage between fuse junction panel fuse 33, pin 1, and ground.
l Is the voltage greater than 10 volts?
è Yes
REPLACE the headlamp bulbs. TEST the system for normal operation.
Measure the resistance between multi-function switch C254-12, circuit 632 (GY/O), and fuse junction panel fuse 33, pin 1.
l Is the resistance less than 5 ohms?
è Yes
REPLACE the multi-function switch. TEST the system for normal operation.
Measure the resistance between LH headlamp C147-2, circuit 12 (LG/BK), and ground.
l Is the resistance greater than 10,000 ohms?
è Yes
RECONNECT the LH headlamp bulb. REPLACE fuse junction panel fuse 33 (15A). Go to «C6».
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