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Ask Gary Your Own Question
Gary, Chevy Technician
Category: Chevy
Satisfied Customers: 16769
Experience:  15 years GM master tech
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2004 chevy trailblazer,no cruise control,air selector not

Customer Question

2004 chevy trailblazer,no cruise control,air selector not working, blows the #39 fuse,short somewhere
Submitted: 1 year ago.
Category: Chevy
Customer: replied 1 year ago.
replaced multifunction switch,brake light switch before short found,trying to get cruise to work
Expert:  Gary replied 1 year ago.

I am sorry for the long wait

is fuse # ***** still blowing ?

Customer: replied 1 year ago.
Expert:  Gary replied 1 year ago.

that fuse powers a lot of things for this truck

will it blow with the key OFF ? as soon as its turned on or when will it exactly blow ?

Customer: replied 1 year ago.
when you turn key on ac off
Expert:  Gary replied 1 year ago.

ok with there being so many brown power wires off of that fuse we need to narrow down which one is blowing the fuse

you need to fist get under the rear fuse box and find this connector C1 as seen here and confirm in terminals A8 and B8 and C8 and E8 and F8 those are ALL brown wires

if they are you have the right connector and what we need to do with the key OFF is unplug that connector and remove those 5 terminals out of the connector marking them so you do not mix up witch ones came out of what terminal

then connect them back in one at a time and find the one you plug in that the fuse will blow

once we know that then we know which brown wire is doing this and which component is on the leg blowing the fuse

then what ever component is on the brown wire that blows the fuse unplug if the fuse still blows the brown wire is shorted from the box to the component which usually running a new wire is the best to do.if it stops blowing with the component unplugged then which ever one you unplugged is bad

Customer: replied 1 year ago.
get back to you got busy
Expert:  Gary replied 1 year ago.

ok let me know