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1997 Isuzu: diesel truck..THe high beams do not go off when the switch…

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I have a 1997 Isuzu...
I have a 1997 Isuzu NPR diesel truck. THe high beams do not go off when the switch is changed. I have replaced the switch with no change. Where can I get an electrical diagram? I suspect a relay is stuck somewhere.
Submitted: 8 years ago.Category: Heavy Equipment
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Answered in 4 hours by:
4/14/2010
Technician: daves71, Fleet Manager replied 8 years ago
daves71
daves71, Fleet Manager
Category: Heavy Equipment
Satisfied Customers: 719
Experience: 35+years working on heavy equipment and heavy duty trucks
Verified
Hi, here is the wiring for the combination switch and head lights,and yes there is a relay for the head light dimmer. The NPR's that I have worked on have had the relays located in a compartment on the passenger side dash.graphic
daves71
daves71, Fleet Manager
Category: Heavy Equipment
Satisfied Customers: 719
Experience: 35+years working on heavy equipment and heavy duty trucks
Verified
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