wiring diagram 89 suburban 1500 / 350

[cbtoolkit]

I have a Chilton's manual for the chevy trucks fitting my year but am wondering if someone has the specific diagram for an 89 Suburban, 1500 350 engine.

I've spent most of the day troubleshooting a short. Everytime I turn on the headlamps, the 20 amp fuse for the courtesy lights goes - bang! Well, more of a pop, actually.

The headlights work, the blinkers work, the hazards barely work, the running lights and brake lights do not work.

I am new to any type of car repair (successfully diagnosed and replaced a vacuum boosters but this has me very frustrated). Just got a multi-meter and read up on diagnostics but..lets just say I may be happy when I solve this or I may be not so happy - just relieved.

Thanks,
Matt Moran
e - mail
my first initial plus my last name at cbtoolkit.com