03 trailblazer wiring diagram needed

i have a customer that has an electrical issue and the haynes manual blows. i was wondering if anyone had a wiring diagram for the horn, alarm/keyless entry remote, interior lights. i think there is a body control module failure but i want to make sure.

i have a customer that has an electrical issue and the haynes manual blows. i was wondering if anyone had a wiring diagram for the horn, alarm/keyless entry remote, interior lights. i think there is a body control module failure but i want to make sure.

Factory repair manual or all data DIY is your best bet.
http://www.alldata.com/products/diy/index.html
Has the wiring and also repair flow charts.